/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:02:12,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:02:12,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:02:12,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:02:12,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 15:02:12,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 15:02:12,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 15:02:12,468 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 15:02:12,502 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:02:12,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:02:12,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:02:12,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:02:12,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:02:12,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:02:12,505 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:02:12,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:02:12,506 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:02:12,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:02:12,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:02:12,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:02:12,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:02:12,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:02:12,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:02:12,507 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:02:12,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:02:12,507 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:02:12,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:02:12,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:02:12,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:02:12,508 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:02:12,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:02:12,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:02:12,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:02:12,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:02:12,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:02:12,508 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:02:12,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:02:12,509 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:02:12,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:02:12,509 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:02:12,509 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:02:12,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:02:12,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:02:12,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:02:12,824 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:02:12,825 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:02:12,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl [2021-06-05 15:02:12,826 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl' [2021-06-05 15:02:12,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:02:12,868 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:02:12,869 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:02:12,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:02:12,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:02:12,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:12" (1/1) ... [2021-06-05 15:02:12,887 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:12" (1/1) ... [2021-06-05 15:02:12,892 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:02:12,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:02:12,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:02:12,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:02:12,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:12" (1/1) ... [2021-06-05 15:02:12,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:12" (1/1) ... [2021-06-05 15:02:12,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:12" (1/1) ... [2021-06-05 15:02:12,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:12" (1/1) ... [2021-06-05 15:02:12,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:12" (1/1) ... [2021-06-05 15:02:12,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:12" (1/1) ... [2021-06-05 15:02:12,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:12" (1/1) ... [2021-06-05 15:02:12,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:02:12,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:02:12,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:02:12,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:02:12,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:02:12,980 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:02:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:02:12,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:02:12,981 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:02:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:02:12,981 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:02:12,981 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:02:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:02:12,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:02:12,982 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:02:12,983 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:02:12,983 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:02:12,983 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 15:02:12,983 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 15:02:12,984 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 15:02:12,984 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-05 15:02:12,984 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-05 15:02:12,984 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-05 15:02:12,985 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-06-05 15:02:12,985 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-06-05 15:02:12,985 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-06-05 15:02:12,986 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:02:13,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:02:13,221 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-05 15:02:13,221 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 15:02:13,222 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 15:02:13,222 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-06-05 15:02:13,222 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-06-05 15:02:13,236 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:02:13 BoogieIcfgContainer [2021-06-05 15:02:13,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:02:13,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:02:13,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:02:13,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:02:13,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:12" (1/2) ... [2021-06-05 15:02:13,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2ca84e and model type parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:02:13, skipping insertion in model container [2021-06-05 15:02:13,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:02:13" (2/2) ... [2021-06-05 15:02:13,261 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1-dsl.wvr.bpl [2021-06-05 15:02:13,266 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:02:13,266 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:02:13,266 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:02:13,267 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:02:13,402 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-06-05 15:02:13,420 INFO L255 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-06-05 15:02:13,437 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:02:13,437 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:02:13,437 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:02:13,437 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:02:13,438 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:02:13,438 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:02:13,438 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:02:13,438 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:02:13,447 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-06-05 15:02:13,483 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:13,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:02:13,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:13,501 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:13,502 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:13,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2039335680, now seen corresponding path program 1 times [2021-06-05 15:02:13,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:13,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134081242] [2021-06-05 15:02:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:13,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:13,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134081242] [2021-06-05 15:02:13,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134081242] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:13,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:02:13,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:02:13,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143403430] [2021-06-05 15:02:13,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:02:13,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:13,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:02:13,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:02:13,789 INFO L87 Difference]: Start difference. First operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:13,889 INFO L93 Difference]: Finished difference Result 1089 states and 4336 transitions. [2021-06-05 15:02:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:02:13,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 15:02:13,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:13,921 INFO L225 Difference]: With dead ends: 1089 [2021-06-05 15:02:13,921 INFO L226 Difference]: Without dead ends: 1068 [2021-06-05 15:02:13,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:02:13,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-06-05 15:02:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 525. [2021-06-05 15:02:14,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.881679389312977) internal successors, (2034), 524 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 2034 transitions. [2021-06-05 15:02:14,024 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 2034 transitions. Word has length 22 [2021-06-05 15:02:14,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:14,025 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 2034 transitions. [2021-06-05 15:02:14,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 2034 transitions. [2021-06-05 15:02:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:02:14,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:14,031 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:14,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:02:14,032 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:14,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:14,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1643355036, now seen corresponding path program 2 times [2021-06-05 15:02:14,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:14,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336748928] [2021-06-05 15:02:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:14,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:14,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336748928] [2021-06-05 15:02:14,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336748928] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:14,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:02:14,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:02:14,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287555241] [2021-06-05 15:02:14,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:02:14,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:14,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:02:14,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:02:14,134 INFO L87 Difference]: Start difference. First operand 525 states and 2034 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:14,189 INFO L93 Difference]: Finished difference Result 1218 states and 4830 transitions. [2021-06-05 15:02:14,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:02:14,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 15:02:14,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:14,199 INFO L225 Difference]: With dead ends: 1218 [2021-06-05 15:02:14,199 INFO L226 Difference]: Without dead ends: 1197 [2021-06-05 15:02:14,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:02:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-05 15:02:14,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 545. [2021-06-05 15:02:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.8529411764705883) internal successors, (2096), 544 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 2096 transitions. [2021-06-05 15:02:14,230 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 2096 transitions. Word has length 22 [2021-06-05 15:02:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:14,231 INFO L482 AbstractCegarLoop]: Abstraction has 545 states and 2096 transitions. [2021-06-05 15:02:14,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 2096 transitions. [2021-06-05 15:02:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:02:14,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:14,233 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:14,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:02:14,234 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:14,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:14,235 INFO L82 PathProgramCache]: Analyzing trace with hash -661584511, now seen corresponding path program 1 times [2021-06-05 15:02:14,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:14,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43818206] [2021-06-05 15:02:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:14,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:14,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43818206] [2021-06-05 15:02:14,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43818206] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:14,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:02:14,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:02:14,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47220829] [2021-06-05 15:02:14,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:02:14,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:14,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:02:14,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:02:14,293 INFO L87 Difference]: Start difference. First operand 545 states and 2096 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:14,320 INFO L93 Difference]: Finished difference Result 545 states and 1997 transitions. [2021-06-05 15:02:14,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:02:14,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:02:14,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:14,324 INFO L225 Difference]: With dead ends: 545 [2021-06-05 15:02:14,324 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 15:02:14,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:02:14,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 15:02:14,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-06-05 15:02:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.6761363636363638) internal successors, (1941), 528 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1941 transitions. [2021-06-05 15:02:14,345 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1941 transitions. Word has length 24 [2021-06-05 15:02:14,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:14,346 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1941 transitions. [2021-06-05 15:02:14,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1941 transitions. [2021-06-05 15:02:14,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:02:14,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:14,348 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:14,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 15:02:14,348 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:14,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:14,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1934875805, now seen corresponding path program 2 times [2021-06-05 15:02:14,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:14,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794588837] [2021-06-05 15:02:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:14,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:14,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794588837] [2021-06-05 15:02:14,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794588837] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:14,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:02:14,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:02:14,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780305575] [2021-06-05 15:02:14,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:02:14,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:14,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:02:14,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:02:14,414 INFO L87 Difference]: Start difference. First operand 529 states and 1941 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:14,544 INFO L93 Difference]: Finished difference Result 1358 states and 5017 transitions. [2021-06-05 15:02:14,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:02:14,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:02:14,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:14,554 INFO L225 Difference]: With dead ends: 1358 [2021-06-05 15:02:14,554 INFO L226 Difference]: Without dead ends: 1346 [2021-06-05 15:02:14,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:02:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-06-05 15:02:14,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 680. [2021-06-05 15:02:14,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.787923416789396) internal successors, (2572), 679 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2572 transitions. [2021-06-05 15:02:14,591 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2572 transitions. Word has length 24 [2021-06-05 15:02:14,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:14,592 INFO L482 AbstractCegarLoop]: Abstraction has 680 states and 2572 transitions. [2021-06-05 15:02:14,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2572 transitions. [2021-06-05 15:02:14,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:02:14,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:14,594 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:14,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 15:02:14,596 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:14,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:14,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2074450649, now seen corresponding path program 1 times [2021-06-05 15:02:14,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:14,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522691189] [2021-06-05 15:02:14,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:14,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:14,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522691189] [2021-06-05 15:02:14,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522691189] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:14,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:02:14,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:02:14,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949119933] [2021-06-05 15:02:14,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:02:14,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:14,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:02:14,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:02:14,638 INFO L87 Difference]: Start difference. First operand 680 states and 2572 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:14,664 INFO L93 Difference]: Finished difference Result 652 states and 2325 transitions. [2021-06-05 15:02:14,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:02:14,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:02:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:14,670 INFO L225 Difference]: With dead ends: 652 [2021-06-05 15:02:14,670 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 15:02:14,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:02:14,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 15:02:14,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-06-05 15:02:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.583747927031509) internal successors, (2161), 603 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 2161 transitions. [2021-06-05 15:02:14,692 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 2161 transitions. Word has length 24 [2021-06-05 15:02:14,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:14,692 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 2161 transitions. [2021-06-05 15:02:14,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:14,692 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 2161 transitions. [2021-06-05 15:02:14,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:02:14,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:14,694 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:14,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 15:02:14,695 INFO L430 AbstractCegarLoop]: === Iteration 6 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:14,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:14,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1944733407, now seen corresponding path program 1 times [2021-06-05 15:02:14,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:14,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976941264] [2021-06-05 15:02:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:14,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:14,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976941264] [2021-06-05 15:02:14,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976941264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:14,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755939700] [2021-06-05 15:02:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:14,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:02:14,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:14,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755939700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:14,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:14,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 15:02:14,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964643987] [2021-06-05 15:02:14,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:02:14,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:14,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:02:14,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:02:14,998 INFO L87 Difference]: Start difference. First operand 604 states and 2161 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:15,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:15,067 INFO L93 Difference]: Finished difference Result 1057 states and 3653 transitions. [2021-06-05 15:02:15,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:02:15,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:02:15,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:15,074 INFO L225 Difference]: With dead ends: 1057 [2021-06-05 15:02:15,074 INFO L226 Difference]: Without dead ends: 989 [2021-06-05 15:02:15,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:02:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-06-05 15:02:15,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 685. [2021-06-05 15:02:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.6271929824561404) internal successors, (2481), 684 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:15,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2481 transitions. [2021-06-05 15:02:15,109 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2481 transitions. Word has length 24 [2021-06-05 15:02:15,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:15,110 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 2481 transitions. [2021-06-05 15:02:15,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:15,110 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2481 transitions. [2021-06-05 15:02:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:02:15,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:15,114 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:15,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-05 15:02:15,325 INFO L430 AbstractCegarLoop]: === Iteration 7 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:15,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1051081059, now seen corresponding path program 2 times [2021-06-05 15:02:15,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:15,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733713437] [2021-06-05 15:02:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:15,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:15,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733713437] [2021-06-05 15:02:15,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733713437] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:15,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:02:15,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:02:15,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475941984] [2021-06-05 15:02:15,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:02:15,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:15,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:02:15,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:02:15,350 INFO L87 Difference]: Start difference. First operand 685 states and 2481 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:15,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:15,429 INFO L93 Difference]: Finished difference Result 990 states and 3448 transitions. [2021-06-05 15:02:15,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:02:15,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:02:15,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:15,436 INFO L225 Difference]: With dead ends: 990 [2021-06-05 15:02:15,436 INFO L226 Difference]: Without dead ends: 963 [2021-06-05 15:02:15,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:02:15,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-06-05 15:02:15,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 703. [2021-06-05 15:02:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.6210826210826212) internal successors, (2542), 702 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2542 transitions. [2021-06-05 15:02:15,464 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2542 transitions. Word has length 24 [2021-06-05 15:02:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:15,465 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2542 transitions. [2021-06-05 15:02:15,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2542 transitions. [2021-06-05 15:02:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:02:15,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:15,471 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:15,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 15:02:15,472 INFO L430 AbstractCegarLoop]: === Iteration 8 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:15,472 INFO L82 PathProgramCache]: Analyzing trace with hash 628675505, now seen corresponding path program 3 times [2021-06-05 15:02:15,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:15,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788762863] [2021-06-05 15:02:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:15,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:15,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788762863] [2021-06-05 15:02:15,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788762863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:15,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98928437] [2021-06-05 15:02:15,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:15,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:02:15,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:15,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:02:15,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:15,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98928437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:15,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:15,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 15:02:15,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856531201] [2021-06-05 15:02:15,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:02:15,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:15,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:02:15,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:02:15,632 INFO L87 Difference]: Start difference. First operand 703 states and 2542 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:15,703 INFO L93 Difference]: Finished difference Result 1033 states and 3563 transitions. [2021-06-05 15:02:15,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:02:15,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:02:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:15,709 INFO L225 Difference]: With dead ends: 1033 [2021-06-05 15:02:15,710 INFO L226 Difference]: Without dead ends: 949 [2021-06-05 15:02:15,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:02:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-06-05 15:02:15,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 628. [2021-06-05 15:02:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.5964912280701755) internal successors, (2255), 627 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2255 transitions. [2021-06-05 15:02:15,731 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2255 transitions. Word has length 24 [2021-06-05 15:02:15,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:15,731 INFO L482 AbstractCegarLoop]: Abstraction has 628 states and 2255 transitions. [2021-06-05 15:02:15,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2255 transitions. [2021-06-05 15:02:15,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:02:15,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:15,733 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:15,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:15,956 INFO L430 AbstractCegarLoop]: === Iteration 9 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:15,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:15,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1476649541, now seen corresponding path program 4 times [2021-06-05 15:02:15,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:15,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298555872] [2021-06-05 15:02:15,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:15,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:15,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298555872] [2021-06-05 15:02:15,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298555872] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:15,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:02:15,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:02:15,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068523386] [2021-06-05 15:02:15,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:02:15,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:15,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:02:15,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:02:15,984 INFO L87 Difference]: Start difference. First operand 628 states and 2255 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:16,062 INFO L93 Difference]: Finished difference Result 847 states and 3018 transitions. [2021-06-05 15:02:16,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:02:16,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:02:16,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:16,067 INFO L225 Difference]: With dead ends: 847 [2021-06-05 15:02:16,067 INFO L226 Difference]: Without dead ends: 827 [2021-06-05 15:02:16,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:02:16,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-06-05 15:02:16,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 620. [2021-06-05 15:02:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.61389337641357) internal successors, (2237), 619 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2237 transitions. [2021-06-05 15:02:16,087 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2237 transitions. Word has length 24 [2021-06-05 15:02:16,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:16,087 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 2237 transitions. [2021-06-05 15:02:16,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,087 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2237 transitions. [2021-06-05 15:02:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:02:16,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:16,089 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:16,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 15:02:16,089 INFO L430 AbstractCegarLoop]: === Iteration 10 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:16,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:16,090 INFO L82 PathProgramCache]: Analyzing trace with hash 954675751, now seen corresponding path program 3 times [2021-06-05 15:02:16,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:16,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138261000] [2021-06-05 15:02:16,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:16,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:16,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138261000] [2021-06-05 15:02:16,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138261000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:16,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692994849] [2021-06-05 15:02:16,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:16,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:02:16,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:16,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:02:16,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:16,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692994849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:16,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:16,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 15:02:16,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205049684] [2021-06-05 15:02:16,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:02:16,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:16,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:02:16,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:02:16,248 INFO L87 Difference]: Start difference. First operand 620 states and 2237 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:16,310 INFO L93 Difference]: Finished difference Result 857 states and 3066 transitions. [2021-06-05 15:02:16,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:02:16,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:02:16,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:16,316 INFO L225 Difference]: With dead ends: 857 [2021-06-05 15:02:16,316 INFO L226 Difference]: Without dead ends: 857 [2021-06-05 15:02:16,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:02:16,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-06-05 15:02:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 548. [2021-06-05 15:02:16,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.579524680073126) internal successors, (1958), 547 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1958 transitions. [2021-06-05 15:02:16,338 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1958 transitions. Word has length 24 [2021-06-05 15:02:16,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:16,338 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1958 transitions. [2021-06-05 15:02:16,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,338 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1958 transitions. [2021-06-05 15:02:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:02:16,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:16,340 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:16,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:02:16,563 INFO L430 AbstractCegarLoop]: === Iteration 11 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:16,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:16,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1922149633, now seen corresponding path program 5 times [2021-06-05 15:02:16,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:16,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367691217] [2021-06-05 15:02:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:16,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:16,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367691217] [2021-06-05 15:02:16,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367691217] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:16,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:02:16,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:02:16,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803004523] [2021-06-05 15:02:16,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:02:16,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:16,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:02:16,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:02:16,596 INFO L87 Difference]: Start difference. First operand 548 states and 1958 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:16,720 INFO L93 Difference]: Finished difference Result 866 states and 3014 transitions. [2021-06-05 15:02:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:02:16,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:02:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:16,726 INFO L225 Difference]: With dead ends: 866 [2021-06-05 15:02:16,726 INFO L226 Difference]: Without dead ends: 842 [2021-06-05 15:02:16,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:02:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-06-05 15:02:16,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 608. [2021-06-05 15:02:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.602965403624382) internal successors, (2187), 607 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2187 transitions. [2021-06-05 15:02:16,745 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2187 transitions. Word has length 24 [2021-06-05 15:02:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:16,745 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 2187 transitions. [2021-06-05 15:02:16,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2187 transitions. [2021-06-05 15:02:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:02:16,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:16,748 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:16,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 15:02:16,748 INFO L430 AbstractCegarLoop]: === Iteration 12 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:16,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1932007235, now seen corresponding path program 4 times [2021-06-05 15:02:16,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:16,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281919853] [2021-06-05 15:02:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:16,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:16,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281919853] [2021-06-05 15:02:16,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281919853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:16,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490152174] [2021-06-05 15:02:16,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:16,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:16,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:02:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:16,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490152174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:16,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:16,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 15:02:16,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821814415] [2021-06-05 15:02:16,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:02:16,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:16,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:02:16,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:02:16,900 INFO L87 Difference]: Start difference. First operand 608 states and 2187 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:16,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:16,977 INFO L93 Difference]: Finished difference Result 825 states and 2855 transitions. [2021-06-05 15:02:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:02:16,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:02:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:16,982 INFO L225 Difference]: With dead ends: 825 [2021-06-05 15:02:16,982 INFO L226 Difference]: Without dead ends: 757 [2021-06-05 15:02:16,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:02:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-05 15:02:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 603. [2021-06-05 15:02:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 3.5930232558139537) internal successors, (2163), 602 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 2163 transitions. [2021-06-05 15:02:17,001 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 2163 transitions. Word has length 24 [2021-06-05 15:02:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:17,001 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 2163 transitions. [2021-06-05 15:02:17,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 2163 transitions. [2021-06-05 15:02:17,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:02:17,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:17,003 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:17,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:17,226 INFO L430 AbstractCegarLoop]: === Iteration 13 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:17,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:17,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1038354887, now seen corresponding path program 5 times [2021-06-05 15:02:17,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:17,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617890824] [2021-06-05 15:02:17,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:17,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:17,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617890824] [2021-06-05 15:02:17,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617890824] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:17,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:02:17,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:02:17,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423675820] [2021-06-05 15:02:17,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:02:17,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:17,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:02:17,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:02:17,258 INFO L87 Difference]: Start difference. First operand 603 states and 2163 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:17,357 INFO L93 Difference]: Finished difference Result 985 states and 3379 transitions. [2021-06-05 15:02:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:02:17,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:02:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:17,362 INFO L225 Difference]: With dead ends: 985 [2021-06-05 15:02:17,362 INFO L226 Difference]: Without dead ends: 946 [2021-06-05 15:02:17,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:02:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-05 15:02:17,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 591. [2021-06-05 15:02:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.6) internal successors, (2124), 590 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 2124 transitions. [2021-06-05 15:02:17,382 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 2124 transitions. Word has length 24 [2021-06-05 15:02:17,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:17,382 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 2124 transitions. [2021-06-05 15:02:17,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 2124 transitions. [2021-06-05 15:02:17,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:02:17,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:17,384 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:17,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 15:02:17,384 INFO L430 AbstractCegarLoop]: === Iteration 14 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:17,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:17,385 INFO L82 PathProgramCache]: Analyzing trace with hash 641401677, now seen corresponding path program 6 times [2021-06-05 15:02:17,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:17,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670547485] [2021-06-05 15:02:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:17,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:17,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670547485] [2021-06-05 15:02:17,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670547485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:17,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329610258] [2021-06-05 15:02:17,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:17,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:02:17,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:17,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:02:17,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:17,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329610258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:17,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:17,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 15:02:17,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578094904] [2021-06-05 15:02:17,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:02:17,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:17,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:02:17,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:02:17,526 INFO L87 Difference]: Start difference. First operand 591 states and 2124 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:17,579 INFO L93 Difference]: Finished difference Result 783 states and 2748 transitions. [2021-06-05 15:02:17,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:02:17,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:02:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:17,584 INFO L225 Difference]: With dead ends: 783 [2021-06-05 15:02:17,584 INFO L226 Difference]: Without dead ends: 783 [2021-06-05 15:02:17,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:02:17,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-06-05 15:02:17,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 582. [2021-06-05 15:02:17,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 3.604130808950086) internal successors, (2094), 581 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:17,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 2094 transitions. [2021-06-05 15:02:17,601 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 2094 transitions. Word has length 24 [2021-06-05 15:02:17,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:17,601 INFO L482 AbstractCegarLoop]: Abstraction has 582 states and 2094 transitions. [2021-06-05 15:02:17,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:17,601 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 2094 transitions. [2021-06-05 15:02:17,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:02:17,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:17,603 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:17,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 15:02:17,826 INFO L430 AbstractCegarLoop]: === Iteration 15 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:17,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:17,827 INFO L82 PathProgramCache]: Analyzing trace with hash 831548115, now seen corresponding path program 6 times [2021-06-05 15:02:17,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:17,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131198623] [2021-06-05 15:02:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:17,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:17,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131198623] [2021-06-05 15:02:17,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131198623] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:17,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:02:17,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:02:17,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981949231] [2021-06-05 15:02:17,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:02:17,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:17,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:02:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:02:17,847 INFO L87 Difference]: Start difference. First operand 582 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:17,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:17,907 INFO L93 Difference]: Finished difference Result 597 states and 2122 transitions. [2021-06-05 15:02:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:02:17,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:02:17,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:17,911 INFO L225 Difference]: With dead ends: 597 [2021-06-05 15:02:17,911 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 15:02:17,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:02:17,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 15:02:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-06-05 15:02:17,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.6382978723404253) internal successors, (2052), 564 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:17,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 2052 transitions. [2021-06-05 15:02:17,925 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 2052 transitions. Word has length 24 [2021-06-05 15:02:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:17,925 INFO L482 AbstractCegarLoop]: Abstraction has 565 states and 2052 transitions. [2021-06-05 15:02:17,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 2052 transitions. [2021-06-05 15:02:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:02:17,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:17,927 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:17,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 15:02:17,927 INFO L430 AbstractCegarLoop]: === Iteration 16 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:17,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:17,927 INFO L82 PathProgramCache]: Analyzing trace with hash -293162627, now seen corresponding path program 7 times [2021-06-05 15:02:17,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:17,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16021404] [2021-06-05 15:02:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:17,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:17,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16021404] [2021-06-05 15:02:17,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16021404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:17,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79031834] [2021-06-05 15:02:17,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:18,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:02:18,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:18,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79031834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:18,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:18,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 15:02:18,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257986056] [2021-06-05 15:02:18,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:02:18,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:18,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:02:18,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:02:18,081 INFO L87 Difference]: Start difference. First operand 565 states and 2052 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:18,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:18,144 INFO L93 Difference]: Finished difference Result 595 states and 2146 transitions. [2021-06-05 15:02:18,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:02:18,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:02:18,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:18,148 INFO L225 Difference]: With dead ends: 595 [2021-06-05 15:02:18,148 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 15:02:18,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:02:18,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 15:02:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 487. [2021-06-05 15:02:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.625514403292181) internal successors, (1762), 486 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1762 transitions. [2021-06-05 15:02:18,162 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1762 transitions. Word has length 24 [2021-06-05 15:02:18,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:18,163 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1762 transitions. [2021-06-05 15:02:18,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1762 transitions. [2021-06-05 15:02:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:18,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:18,164 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:18,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:18,381 INFO L430 AbstractCegarLoop]: === Iteration 17 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:18,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:18,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1216404668, now seen corresponding path program 1 times [2021-06-05 15:02:18,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:18,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507770057] [2021-06-05 15:02:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:18,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:18,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507770057] [2021-06-05 15:02:18,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507770057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:18,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036458895] [2021-06-05 15:02:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:18,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:18,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:18,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:18,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:02:18,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:18,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:18,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:18,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:02:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:18,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036458895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:18,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:18,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:02:18,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945546575] [2021-06-05 15:02:18,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:02:18,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:18,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:02:18,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:18,960 INFO L87 Difference]: Start difference. First operand 487 states and 1762 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:19,351 INFO L93 Difference]: Finished difference Result 941 states and 3508 transitions. [2021-06-05 15:02:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:02:19,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:19,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:19,355 INFO L225 Difference]: With dead ends: 941 [2021-06-05 15:02:19,355 INFO L226 Difference]: Without dead ends: 860 [2021-06-05 15:02:19,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:02:19,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-06-05 15:02:19,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 547. [2021-06-05 15:02:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 3.6336996336996337) internal successors, (1984), 546 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1984 transitions. [2021-06-05 15:02:19,372 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1984 transitions. Word has length 26 [2021-06-05 15:02:19,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:19,372 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1984 transitions. [2021-06-05 15:02:19,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:19,372 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1984 transitions. [2021-06-05 15:02:19,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:19,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:19,374 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:19,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 15:02:19,598 INFO L430 AbstractCegarLoop]: === Iteration 18 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:19,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:19,598 INFO L82 PathProgramCache]: Analyzing trace with hash 469022628, now seen corresponding path program 1 times [2021-06-05 15:02:19,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:19,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516870453] [2021-06-05 15:02:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:19,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:19,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516870453] [2021-06-05 15:02:19,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516870453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:19,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401741299] [2021-06-05 15:02:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:19,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:19,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:19,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:19,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:02:20,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:20,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:20,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:20,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:02:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:20,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401741299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:20,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:20,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:02:20,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527239889] [2021-06-05 15:02:20,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:02:20,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:20,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:02:20,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:20,054 INFO L87 Difference]: Start difference. First operand 547 states and 1984 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:20,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:20,435 INFO L93 Difference]: Finished difference Result 1017 states and 3788 transitions. [2021-06-05 15:02:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:02:20,435 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:20,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:20,438 INFO L225 Difference]: With dead ends: 1017 [2021-06-05 15:02:20,439 INFO L226 Difference]: Without dead ends: 936 [2021-06-05 15:02:20,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:02:20,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-05 15:02:20,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 569. [2021-06-05 15:02:20,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.653169014084507) internal successors, (2075), 568 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:20,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 2075 transitions. [2021-06-05 15:02:20,462 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 2075 transitions. Word has length 26 [2021-06-05 15:02:20,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:20,462 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 2075 transitions. [2021-06-05 15:02:20,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:20,462 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 2075 transitions. [2021-06-05 15:02:20,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:20,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:20,464 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:20,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 15:02:20,688 INFO L430 AbstractCegarLoop]: === Iteration 19 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:20,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:20,688 INFO L82 PathProgramCache]: Analyzing trace with hash -573555838, now seen corresponding path program 2 times [2021-06-05 15:02:20,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:20,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800411144] [2021-06-05 15:02:20,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:20,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:20,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800411144] [2021-06-05 15:02:20,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800411144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:20,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825732194] [2021-06-05 15:02:20,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:20,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:20,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:20,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:02:20,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:20,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:20,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:20,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:20,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:20,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:20,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:02:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:21,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825732194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:21,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:21,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:02:21,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862533424] [2021-06-05 15:02:21,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:02:21,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:21,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:02:21,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:21,106 INFO L87 Difference]: Start difference. First operand 569 states and 2075 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:22,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:22,328 INFO L93 Difference]: Finished difference Result 1392 states and 5274 transitions. [2021-06-05 15:02:22,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:02:22,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:22,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:22,333 INFO L225 Difference]: With dead ends: 1392 [2021-06-05 15:02:22,333 INFO L226 Difference]: Without dead ends: 1319 [2021-06-05 15:02:22,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 887.9ms TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:02:22,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-06-05 15:02:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 596. [2021-06-05 15:02:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.6621848739495797) internal successors, (2179), 595 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 2179 transitions. [2021-06-05 15:02:22,354 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 2179 transitions. Word has length 26 [2021-06-05 15:02:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:22,354 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 2179 transitions. [2021-06-05 15:02:22,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 2179 transitions. [2021-06-05 15:02:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:22,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:22,356 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:22,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:22,578 INFO L430 AbstractCegarLoop]: === Iteration 20 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:22,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:22,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1969142914, now seen corresponding path program 3 times [2021-06-05 15:02:22,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:22,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442908643] [2021-06-05 15:02:22,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:22,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:22,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442908643] [2021-06-05 15:02:22,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442908643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:22,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394460190] [2021-06-05 15:02:22,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:22,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:02:22,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:22,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:02:22,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:22,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:22,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:22,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:22,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:22,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:22,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:02:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:22,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394460190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:22,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:22,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:02:22,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512833620] [2021-06-05 15:02:22,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:02:22,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:22,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:02:22,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:22,979 INFO L87 Difference]: Start difference. First operand 596 states and 2179 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:24,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:24,277 INFO L93 Difference]: Finished difference Result 1450 states and 5515 transitions. [2021-06-05 15:02:24,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:02:24,277 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:24,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:24,283 INFO L225 Difference]: With dead ends: 1450 [2021-06-05 15:02:24,283 INFO L226 Difference]: Without dead ends: 1367 [2021-06-05 15:02:24,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 902.7ms TimeCoverageRelationStatistics Valid=319, Invalid=1241, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:02:24,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-06-05 15:02:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 594. [2021-06-05 15:02:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 3.6627318718381114) internal successors, (2172), 593 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 2172 transitions. [2021-06-05 15:02:24,305 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 2172 transitions. Word has length 26 [2021-06-05 15:02:24,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:24,305 INFO L482 AbstractCegarLoop]: Abstraction has 594 states and 2172 transitions. [2021-06-05 15:02:24,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 2172 transitions. [2021-06-05 15:02:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:24,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:24,306 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:24,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:24,509 INFO L430 AbstractCegarLoop]: === Iteration 21 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:24,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:24,509 INFO L82 PathProgramCache]: Analyzing trace with hash 730358562, now seen corresponding path program 2 times [2021-06-05 15:02:24,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:24,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308331943] [2021-06-05 15:02:24,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:02:24,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:24,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308331943] [2021-06-05 15:02:24,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308331943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:24,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500121689] [2021-06-05 15:02:24,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:24,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:24,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:24,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:02:24,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:24,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:24,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:24,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:24,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:24,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:24,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:02:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:24,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500121689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:24,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:24,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:02:24,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109637226] [2021-06-05 15:02:24,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:02:24,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:24,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:02:24,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:24,926 INFO L87 Difference]: Start difference. First operand 594 states and 2172 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:26,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:26,009 INFO L93 Difference]: Finished difference Result 2074 states and 7690 transitions. [2021-06-05 15:02:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:02:26,010 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:26,016 INFO L225 Difference]: With dead ends: 2074 [2021-06-05 15:02:26,016 INFO L226 Difference]: Without dead ends: 1801 [2021-06-05 15:02:26,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 791.6ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:02:26,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-06-05 15:02:26,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 663. [2021-06-05 15:02:26,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 3.7447129909365557) internal successors, (2479), 662 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:26,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 2479 transitions. [2021-06-05 15:02:26,044 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 2479 transitions. Word has length 26 [2021-06-05 15:02:26,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:26,044 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 2479 transitions. [2021-06-05 15:02:26,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:26,044 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 2479 transitions. [2021-06-05 15:02:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:26,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:26,046 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:26,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 15:02:26,269 INFO L430 AbstractCegarLoop]: === Iteration 22 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:26,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:26,269 INFO L82 PathProgramCache]: Analyzing trace with hash 197601580, now seen corresponding path program 3 times [2021-06-05 15:02:26,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:26,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654043620] [2021-06-05 15:02:26,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:02:26,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:26,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654043620] [2021-06-05 15:02:26,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654043620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:26,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616705889] [2021-06-05 15:02:26,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:26,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:02:26,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:26,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:02:26,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:26,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:26,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:26,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:26,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:26,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:26,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:02:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:26,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616705889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:26,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:26,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:02:26,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100256987] [2021-06-05 15:02:26,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:02:26,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:26,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:02:26,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:26,649 INFO L87 Difference]: Start difference. First operand 663 states and 2479 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:27,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:27,844 INFO L93 Difference]: Finished difference Result 2233 states and 8308 transitions. [2021-06-05 15:02:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:02:27,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:27,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:27,851 INFO L225 Difference]: With dead ends: 2233 [2021-06-05 15:02:27,851 INFO L226 Difference]: Without dead ends: 1961 [2021-06-05 15:02:27,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 890.3ms TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:02:27,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-05 15:02:27,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 704. [2021-06-05 15:02:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 3.8207681365576103) internal successors, (2686), 703 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:27,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 2686 transitions. [2021-06-05 15:02:27,880 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 2686 transitions. Word has length 26 [2021-06-05 15:02:27,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:27,880 INFO L482 AbstractCegarLoop]: Abstraction has 704 states and 2686 transitions. [2021-06-05 15:02:27,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:27,880 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 2686 transitions. [2021-06-05 15:02:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:27,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:27,882 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:28,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 15:02:28,101 INFO L430 AbstractCegarLoop]: === Iteration 23 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:28,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:28,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1995337340, now seen corresponding path program 1 times [2021-06-05 15:02:28,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:28,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850116168] [2021-06-05 15:02:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:28,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:28,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850116168] [2021-06-05 15:02:28,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850116168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:28,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181044608] [2021-06-05 15:02:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:28,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:28,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:28,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:28,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:02:28,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:28,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:28,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:28,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:02:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:28,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181044608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:28,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:28,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:02:28,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196686940] [2021-06-05 15:02:28,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:28,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:28,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:28,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:28,435 INFO L87 Difference]: Start difference. First operand 704 states and 2686 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:28,739 INFO L93 Difference]: Finished difference Result 1073 states and 4116 transitions. [2021-06-05 15:02:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:02:28,740 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:28,743 INFO L225 Difference]: With dead ends: 1073 [2021-06-05 15:02:28,743 INFO L226 Difference]: Without dead ends: 1000 [2021-06-05 15:02:28,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-06-05 15:02:28,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 731. [2021-06-05 15:02:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.8273972602739725) internal successors, (2794), 730 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2794 transitions. [2021-06-05 15:02:28,763 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2794 transitions. Word has length 26 [2021-06-05 15:02:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:28,764 INFO L482 AbstractCegarLoop]: Abstraction has 731 states and 2794 transitions. [2021-06-05 15:02:28,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:28,764 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2794 transitions. [2021-06-05 15:02:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:28,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:28,766 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:28,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 15:02:28,989 INFO L430 AbstractCegarLoop]: === Iteration 24 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:28,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:28,989 INFO L82 PathProgramCache]: Analyzing trace with hash -773558878, now seen corresponding path program 2 times [2021-06-05 15:02:28,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:28,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752343150] [2021-06-05 15:02:28,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:29,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:29,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752343150] [2021-06-05 15:02:29,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752343150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:29,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083464080] [2021-06-05 15:02:29,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:29,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:29,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:29,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:29,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:29,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:29,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:29,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:29,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:29,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:29,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 15:02:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:29,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083464080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:29,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:29,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 15:02:29,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601208464] [2021-06-05 15:02:29,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:02:29,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:29,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:02:29,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:29,369 INFO L87 Difference]: Start difference. First operand 731 states and 2794 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:30,076 INFO L93 Difference]: Finished difference Result 1158 states and 4457 transitions. [2021-06-05 15:02:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:02:30,077 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:30,080 INFO L225 Difference]: With dead ends: 1158 [2021-06-05 15:02:30,080 INFO L226 Difference]: Without dead ends: 1083 [2021-06-05 15:02:30,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 541.5ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:02:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-06-05 15:02:30,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 727. [2021-06-05 15:02:30,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.8264462809917354) internal successors, (2778), 726 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2778 transitions. [2021-06-05 15:02:30,099 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2778 transitions. Word has length 26 [2021-06-05 15:02:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:30,099 INFO L482 AbstractCegarLoop]: Abstraction has 727 states and 2778 transitions. [2021-06-05 15:02:30,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2778 transitions. [2021-06-05 15:02:30,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:30,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:30,101 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:30,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:30,323 INFO L430 AbstractCegarLoop]: === Iteration 25 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:30,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:30,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1010642212, now seen corresponding path program 1 times [2021-06-05 15:02:30,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:30,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851926750] [2021-06-05 15:02:30,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:30,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:30,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851926750] [2021-06-05 15:02:30,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851926750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:30,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545125264] [2021-06-05 15:02:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:30,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:30,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:30,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:30,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:02:30,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:30,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:30,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:30,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:02:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:30,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545125264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:30,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:30,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:02:30,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674206130] [2021-06-05 15:02:30,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:30,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:30,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:30,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:30,615 INFO L87 Difference]: Start difference. First operand 727 states and 2778 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:30,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:30,842 INFO L93 Difference]: Finished difference Result 1126 states and 4320 transitions. [2021-06-05 15:02:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:02:30,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:30,845 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 15:02:30,846 INFO L226 Difference]: Without dead ends: 1044 [2021-06-05 15:02:30,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:30,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-05 15:02:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 738. [2021-06-05 15:02:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.8317503392130257) internal successors, (2824), 737 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2824 transitions. [2021-06-05 15:02:30,865 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2824 transitions. Word has length 26 [2021-06-05 15:02:30,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:30,865 INFO L482 AbstractCegarLoop]: Abstraction has 738 states and 2824 transitions. [2021-06-05 15:02:30,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:30,865 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2824 transitions. [2021-06-05 15:02:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:30,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:30,867 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:31,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 15:02:31,088 INFO L430 AbstractCegarLoop]: === Iteration 26 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:31,089 INFO L82 PathProgramCache]: Analyzing trace with hash -390158146, now seen corresponding path program 2 times [2021-06-05 15:02:31,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:31,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906662606] [2021-06-05 15:02:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:31,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:31,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906662606] [2021-06-05 15:02:31,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906662606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:31,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309066552] [2021-06-05 15:02:31,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:31,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:31,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:31,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:31,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:31,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:31,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:31,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:31,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:31,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:31,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 15:02:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:31,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309066552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:31,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:31,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 15:02:31,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829386526] [2021-06-05 15:02:31,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:02:31,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:31,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:02:31,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:31,456 INFO L87 Difference]: Start difference. First operand 738 states and 2824 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:32,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:32,078 INFO L93 Difference]: Finished difference Result 1204 states and 4625 transitions. [2021-06-05 15:02:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:02:32,079 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:32,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:32,082 INFO L225 Difference]: With dead ends: 1204 [2021-06-05 15:02:32,082 INFO L226 Difference]: Without dead ends: 1131 [2021-06-05 15:02:32,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 496.5ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:02:32,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-06-05 15:02:32,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 736. [2021-06-05 15:02:32,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.83265306122449) internal successors, (2817), 735 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:32,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2817 transitions. [2021-06-05 15:02:32,101 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2817 transitions. Word has length 26 [2021-06-05 15:02:32,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:32,101 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2817 transitions. [2021-06-05 15:02:32,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:32,101 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2817 transitions. [2021-06-05 15:02:32,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:32,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:32,103 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:32,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:32,325 INFO L430 AbstractCegarLoop]: === Iteration 27 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:32,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:32,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1105227200, now seen corresponding path program 3 times [2021-06-05 15:02:32,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:32,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653730020] [2021-06-05 15:02:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:32,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:32,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653730020] [2021-06-05 15:02:32,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653730020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:32,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212529797] [2021-06-05 15:02:32,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:32,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:02:32,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:32,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:32,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:32,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:32,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 15:02:32,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:32,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:32,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:32,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-06-05 15:02:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:32,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212529797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:32,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:32,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 15:02:32,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689979475] [2021-06-05 15:02:32,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:02:32,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:32,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:02:32,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:32,701 INFO L87 Difference]: Start difference. First operand 736 states and 2817 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:33,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:33,363 INFO L93 Difference]: Finished difference Result 1194 states and 4592 transitions. [2021-06-05 15:02:33,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:02:33,363 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:33,366 INFO L225 Difference]: With dead ends: 1194 [2021-06-05 15:02:33,367 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 15:02:33,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 451.4ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 15:02:33,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 760. [2021-06-05 15:02:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.8194993412384717) internal successors, (2899), 759 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:33,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2899 transitions. [2021-06-05 15:02:33,386 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2899 transitions. Word has length 26 [2021-06-05 15:02:33,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:33,386 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2899 transitions. [2021-06-05 15:02:33,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:33,386 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2899 transitions. [2021-06-05 15:02:33,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:33,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:33,388 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:33,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 15:02:33,602 INFO L430 AbstractCegarLoop]: === Iteration 28 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:33,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1970882652, now seen corresponding path program 3 times [2021-06-05 15:02:33,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:33,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348090531] [2021-06-05 15:02:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:33,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:33,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348090531] [2021-06-05 15:02:33,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348090531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:33,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765560896] [2021-06-05 15:02:33,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:33,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:02:33,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:33,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:33,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:33,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:33,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 15:02:33,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:33,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:33,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:33,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-06-05 15:02:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:33,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765560896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:33,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:33,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 15:02:33,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112667432] [2021-06-05 15:02:33,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:02:33,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:33,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:02:33,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:02:33,984 INFO L87 Difference]: Start difference. First operand 760 states and 2899 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:34,580 INFO L93 Difference]: Finished difference Result 1244 states and 4764 transitions. [2021-06-05 15:02:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:02:34,581 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:34,584 INFO L225 Difference]: With dead ends: 1244 [2021-06-05 15:02:34,584 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 15:02:34,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 471.8ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:02:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 15:02:34,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 736. [2021-06-05 15:02:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.83265306122449) internal successors, (2817), 735 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2817 transitions. [2021-06-05 15:02:34,604 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2817 transitions. Word has length 26 [2021-06-05 15:02:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:34,604 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2817 transitions. [2021-06-05 15:02:34,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:34,604 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2817 transitions. [2021-06-05 15:02:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:34,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:34,606 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:34,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 15:02:34,829 INFO L430 AbstractCegarLoop]: === Iteration 29 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:34,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:34,829 INFO L82 PathProgramCache]: Analyzing trace with hash -248765392, now seen corresponding path program 4 times [2021-06-05 15:02:34,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:34,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734651639] [2021-06-05 15:02:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:34,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:34,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734651639] [2021-06-05 15:02:34,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734651639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:34,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721852522] [2021-06-05 15:02:34,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:34,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:34,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:34,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:34,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:35,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:35,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:02:35,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:35,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:35,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:35,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 15:02:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:35,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721852522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:35,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:35,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:02:35,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702095464] [2021-06-05 15:02:35,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:35,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:35,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:35,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:35,093 INFO L87 Difference]: Start difference. First operand 736 states and 2817 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:35,394 INFO L93 Difference]: Finished difference Result 1173 states and 4474 transitions. [2021-06-05 15:02:35,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:02:35,394 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:35,401 INFO L225 Difference]: With dead ends: 1173 [2021-06-05 15:02:35,401 INFO L226 Difference]: Without dead ends: 1100 [2021-06-05 15:02:35,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-06-05 15:02:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 772. [2021-06-05 15:02:35,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.8171206225680936) internal successors, (2943), 771 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2943 transitions. [2021-06-05 15:02:35,430 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2943 transitions. Word has length 26 [2021-06-05 15:02:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:35,430 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2943 transitions. [2021-06-05 15:02:35,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2943 transitions. [2021-06-05 15:02:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:35,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:35,435 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:35,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 15:02:35,649 INFO L430 AbstractCegarLoop]: === Iteration 30 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:35,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:35,649 INFO L82 PathProgramCache]: Analyzing trace with hash -959064550, now seen corresponding path program 4 times [2021-06-05 15:02:35,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:35,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781111992] [2021-06-05 15:02:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:35,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:35,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781111992] [2021-06-05 15:02:35,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781111992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:35,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274696663] [2021-06-05 15:02:35,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:35,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:35,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:35,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:35,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:35,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:35,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:02:35,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:35,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:35,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:35,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 15:02:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:35,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274696663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:35,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:35,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:02:35,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997301625] [2021-06-05 15:02:35,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:35,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:35,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:35,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:35,889 INFO L87 Difference]: Start difference. First operand 772 states and 2943 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:36,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:36,128 INFO L93 Difference]: Finished difference Result 1131 states and 4327 transitions. [2021-06-05 15:02:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:02:36,129 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:36,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:36,132 INFO L225 Difference]: With dead ends: 1131 [2021-06-05 15:02:36,132 INFO L226 Difference]: Without dead ends: 1058 [2021-06-05 15:02:36,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:36,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-05 15:02:36,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 772. [2021-06-05 15:02:36,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.8171206225680936) internal successors, (2943), 771 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2943 transitions. [2021-06-05 15:02:36,151 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2943 transitions. Word has length 26 [2021-06-05 15:02:36,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:36,151 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2943 transitions. [2021-06-05 15:02:36,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:36,151 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2943 transitions. [2021-06-05 15:02:36,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:36,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:36,153 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:36,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 15:02:36,373 INFO L430 AbstractCegarLoop]: === Iteration 31 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:36,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:36,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1223906964, now seen corresponding path program 5 times [2021-06-05 15:02:36,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:36,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605817332] [2021-06-05 15:02:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:36,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:36,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605817332] [2021-06-05 15:02:36,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605817332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:36,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292609516] [2021-06-05 15:02:36,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:36,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:36,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:36,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:36,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:36,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:36,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:02:36,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:36,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:36,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:36,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:02:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:36,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292609516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:36,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:36,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:02:36,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135290545] [2021-06-05 15:02:36,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:36,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:36,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:36,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:36,665 INFO L87 Difference]: Start difference. First operand 772 states and 2943 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:36,862 INFO L93 Difference]: Finished difference Result 1162 states and 4434 transitions. [2021-06-05 15:02:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:02:36,863 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:36,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:36,865 INFO L225 Difference]: With dead ends: 1162 [2021-06-05 15:02:36,865 INFO L226 Difference]: Without dead ends: 1089 [2021-06-05 15:02:36,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:36,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-05 15:02:36,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 781. [2021-06-05 15:02:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.8205128205128207) internal successors, (2980), 780 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2980 transitions. [2021-06-05 15:02:36,883 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2980 transitions. Word has length 26 [2021-06-05 15:02:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:36,883 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2980 transitions. [2021-06-05 15:02:36,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2980 transitions. [2021-06-05 15:02:36,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:36,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:36,885 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:37,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:37,108 INFO L430 AbstractCegarLoop]: === Iteration 32 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:37,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1537433360, now seen corresponding path program 6 times [2021-06-05 15:02:37,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:37,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383830526] [2021-06-05 15:02:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:37,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:37,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383830526] [2021-06-05 15:02:37,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383830526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:37,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647366957] [2021-06-05 15:02:37,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:37,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:02:37,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:37,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:02:37,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:37,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:37,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:37,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:37,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:37,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:37,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:02:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:37,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647366957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:37,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:37,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:02:37,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531478567] [2021-06-05 15:02:37,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:02:37,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:37,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:02:37,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:37,396 INFO L87 Difference]: Start difference. First operand 781 states and 2980 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:38,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:38,244 INFO L93 Difference]: Finished difference Result 1321 states and 5044 transitions. [2021-06-05 15:02:38,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:02:38,245 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:38,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:38,247 INFO L225 Difference]: With dead ends: 1321 [2021-06-05 15:02:38,247 INFO L226 Difference]: Without dead ends: 1238 [2021-06-05 15:02:38,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 568.1ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:02:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-05 15:02:38,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 772. [2021-06-05 15:02:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.8171206225680936) internal successors, (2943), 771 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:38,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2943 transitions. [2021-06-05 15:02:38,263 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2943 transitions. Word has length 26 [2021-06-05 15:02:38,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:38,263 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2943 transitions. [2021-06-05 15:02:38,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:38,263 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2943 transitions. [2021-06-05 15:02:38,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:38,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:38,265 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:38,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:38,488 INFO L430 AbstractCegarLoop]: === Iteration 33 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:38,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:38,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1898034838, now seen corresponding path program 5 times [2021-06-05 15:02:38,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:38,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232247605] [2021-06-05 15:02:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:38,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:38,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232247605] [2021-06-05 15:02:38,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232247605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:38,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849724351] [2021-06-05 15:02:38,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:38,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:38,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:38,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:38,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:38,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:38,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:02:38,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:38,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:38,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:38,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:02:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:38,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849724351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:38,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:38,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:02:38,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042812128] [2021-06-05 15:02:38,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:38,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:38,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:38,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:38,768 INFO L87 Difference]: Start difference. First operand 772 states and 2943 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:38,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:38,993 INFO L93 Difference]: Finished difference Result 1118 states and 4279 transitions. [2021-06-05 15:02:38,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:02:38,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:38,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:38,995 INFO L225 Difference]: With dead ends: 1118 [2021-06-05 15:02:38,995 INFO L226 Difference]: Without dead ends: 1045 [2021-06-05 15:02:38,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-06-05 15:02:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 781. [2021-06-05 15:02:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.821794871794872) internal successors, (2981), 780 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2981 transitions. [2021-06-05 15:02:39,010 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2981 transitions. Word has length 26 [2021-06-05 15:02:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:39,010 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2981 transitions. [2021-06-05 15:02:39,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2981 transitions. [2021-06-05 15:02:39,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:39,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:39,012 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:39,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 15:02:39,235 INFO L430 AbstractCegarLoop]: === Iteration 34 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:39,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1441749820, now seen corresponding path program 6 times [2021-06-05 15:02:39,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:39,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811646647] [2021-06-05 15:02:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:39,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:39,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811646647] [2021-06-05 15:02:39,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811646647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:39,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041190973] [2021-06-05 15:02:39,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:39,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:02:39,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:39,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:02:39,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:39,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:39,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:39,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:39,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:39,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:39,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:02:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:39,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041190973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:39,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:39,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:02:39,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051962685] [2021-06-05 15:02:39,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:02:39,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:39,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:02:39,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:39,533 INFO L87 Difference]: Start difference. First operand 781 states and 2981 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:40,376 INFO L93 Difference]: Finished difference Result 1254 states and 4780 transitions. [2021-06-05 15:02:40,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:02:40,376 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:40,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:40,378 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 15:02:40,378 INFO L226 Difference]: Without dead ends: 1179 [2021-06-05 15:02:40,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 591.7ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:02:40,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-06-05 15:02:40,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 772. [2021-06-05 15:02:40,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.8171206225680936) internal successors, (2943), 771 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:40,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2943 transitions. [2021-06-05 15:02:40,394 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2943 transitions. Word has length 26 [2021-06-05 15:02:40,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:40,394 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2943 transitions. [2021-06-05 15:02:40,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:40,394 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2943 transitions. [2021-06-05 15:02:40,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:40,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:40,396 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:40,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:40,618 INFO L430 AbstractCegarLoop]: === Iteration 35 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:40,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1317477424, now seen corresponding path program 4 times [2021-06-05 15:02:40,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:40,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315009692] [2021-06-05 15:02:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:40,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:40,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315009692] [2021-06-05 15:02:40,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315009692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:40,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543590255] [2021-06-05 15:02:40,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:40,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:40,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:40,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:40,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:40,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:40,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:02:40,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:40,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:40,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:40,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 15:02:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:40,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543590255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:40,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:40,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:02:40,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796516200] [2021-06-05 15:02:40,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:40,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:40,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:40,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:40,891 INFO L87 Difference]: Start difference. First operand 772 states and 2943 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:41,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:41,269 INFO L93 Difference]: Finished difference Result 1441 states and 5439 transitions. [2021-06-05 15:02:41,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:02:41,269 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:41,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:41,271 INFO L225 Difference]: With dead ends: 1441 [2021-06-05 15:02:41,271 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 15:02:41,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:02:41,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 15:02:41,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 850. [2021-06-05 15:02:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.872791519434629) internal successors, (3288), 849 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 3288 transitions. [2021-06-05 15:02:41,292 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 3288 transitions. Word has length 26 [2021-06-05 15:02:41,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:41,293 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 3288 transitions. [2021-06-05 15:02:41,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 3288 transitions. [2021-06-05 15:02:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:41,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:41,295 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:41,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 15:02:41,517 INFO L430 AbstractCegarLoop]: === Iteration 36 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:41,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:41,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2027776582, now seen corresponding path program 4 times [2021-06-05 15:02:41,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:41,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89360232] [2021-06-05 15:02:41,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:41,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:41,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89360232] [2021-06-05 15:02:41,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89360232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:41,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601661905] [2021-06-05 15:02:41,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:41,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:41,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:41,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:41,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:41,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:41,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:02:41,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:41,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:41,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:41,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 15:02:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:41,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601661905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:41,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:41,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:02:41,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570662136] [2021-06-05 15:02:41,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:41,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:41,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:41,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:41,792 INFO L87 Difference]: Start difference. First operand 850 states and 3288 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:42,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:42,007 INFO L93 Difference]: Finished difference Result 1248 states and 4823 transitions. [2021-06-05 15:02:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:02:42,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:42,009 INFO L225 Difference]: With dead ends: 1248 [2021-06-05 15:02:42,010 INFO L226 Difference]: Without dead ends: 1166 [2021-06-05 15:02:42,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:42,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-05 15:02:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 826. [2021-06-05 15:02:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.896969696969697) internal successors, (3215), 825 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 3215 transitions. [2021-06-05 15:02:42,024 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 3215 transitions. Word has length 26 [2021-06-05 15:02:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:42,024 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 3215 transitions. [2021-06-05 15:02:42,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 3215 transitions. [2021-06-05 15:02:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:42,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:42,026 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:42,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 15:02:42,241 INFO L430 AbstractCegarLoop]: === Iteration 37 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash -177742916, now seen corresponding path program 5 times [2021-06-05 15:02:42,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:42,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962071744] [2021-06-05 15:02:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:42,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:42,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962071744] [2021-06-05 15:02:42,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962071744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:42,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115039035] [2021-06-05 15:02:42,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:42,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:02:42,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:42,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:02:42,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:42,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:42,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:02:42,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:42,498 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.9 percent of original size [2021-06-05 15:02:42,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:42,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:13 [2021-06-05 15:02:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:42,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115039035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:42,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:42,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 15:02:42,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800109538] [2021-06-05 15:02:42,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:02:42,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:42,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:02:42,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:42,550 INFO L87 Difference]: Start difference. First operand 826 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:42,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:42,948 INFO L93 Difference]: Finished difference Result 1332 states and 5148 transitions. [2021-06-05 15:02:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:02:42,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:42,950 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 15:02:42,951 INFO L226 Difference]: Without dead ends: 1241 [2021-06-05 15:02:42,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 296.2ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:02:42,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-06-05 15:02:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 844. [2021-06-05 15:02:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.9383155397390275) internal successors, (3320), 843 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:42,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 3320 transitions. [2021-06-05 15:02:42,965 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 3320 transitions. Word has length 26 [2021-06-05 15:02:42,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:42,965 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 3320 transitions. [2021-06-05 15:02:42,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:42,966 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 3320 transitions. [2021-06-05 15:02:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:42,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:42,968 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:43,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 15:02:43,177 INFO L430 AbstractCegarLoop]: === Iteration 38 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:43,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1790221484, now seen corresponding path program 6 times [2021-06-05 15:02:43,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:43,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814604039] [2021-06-05 15:02:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:43,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:43,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814604039] [2021-06-05 15:02:43,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814604039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:43,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807336216] [2021-06-05 15:02:43,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:43,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:02:43,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:43,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:02:43,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:43,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:43,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:43,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:43,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:43,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:43,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-06-05 15:02:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:43,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807336216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:43,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:43,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 15:02:43,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038157979] [2021-06-05 15:02:43,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:02:43,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:43,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:02:43,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:02:43,524 INFO L87 Difference]: Start difference. First operand 844 states and 3320 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:44,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:44,436 INFO L93 Difference]: Finished difference Result 1842 states and 7162 transitions. [2021-06-05 15:02:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:02:44,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:44,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:44,439 INFO L225 Difference]: With dead ends: 1842 [2021-06-05 15:02:44,439 INFO L226 Difference]: Without dead ends: 1679 [2021-06-05 15:02:44,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 682.6ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:02:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2021-06-05 15:02:44,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 868. [2021-06-05 15:02:44,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:44,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-06-05 15:02:44,459 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-06-05 15:02:44,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:44,459 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-06-05 15:02:44,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:44,460 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-06-05 15:02:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:44,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:44,462 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:44,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 15:02:44,673 INFO L430 AbstractCegarLoop]: === Iteration 39 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:44,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1647634560, now seen corresponding path program 5 times [2021-06-05 15:02:44,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:44,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069469750] [2021-06-05 15:02:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:44,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:44,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069469750] [2021-06-05 15:02:44,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069469750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:44,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967352239] [2021-06-05 15:02:44,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:44,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:44,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:44,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:44,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:44,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:44,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:02:44,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:44,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:44,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:44,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:02:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:44,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967352239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:44,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:44,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:02:44,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002369594] [2021-06-05 15:02:44,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:44,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:44,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:44,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:44,894 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:45,128 INFO L93 Difference]: Finished difference Result 1245 states and 4905 transitions. [2021-06-05 15:02:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:02:45,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:45,130 INFO L225 Difference]: With dead ends: 1245 [2021-06-05 15:02:45,130 INFO L226 Difference]: Without dead ends: 1163 [2021-06-05 15:02:45,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-06-05 15:02:45,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 877. [2021-06-05 15:02:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.9817351598173514) internal successors, (3488), 876 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3488 transitions. [2021-06-05 15:02:45,143 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3488 transitions. Word has length 26 [2021-06-05 15:02:45,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:45,143 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 3488 transitions. [2021-06-05 15:02:45,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3488 transitions. [2021-06-05 15:02:45,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:45,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:45,146 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:45,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:45,368 INFO L430 AbstractCegarLoop]: === Iteration 40 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:45,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:45,369 INFO L82 PathProgramCache]: Analyzing trace with hash -881304204, now seen corresponding path program 6 times [2021-06-05 15:02:45,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:45,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864584245] [2021-06-05 15:02:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:45,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:45,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864584245] [2021-06-05 15:02:45,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864584245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:45,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794656107] [2021-06-05 15:02:45,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:45,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:02:45,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:45,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:02:45,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:45,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:45,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:45,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:45,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:45,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:45,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-06-05 15:02:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:45,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794656107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:45,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:45,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 15:02:45,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595899292] [2021-06-05 15:02:45,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:02:45,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:45,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:02:45,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:02:45,685 INFO L87 Difference]: Start difference. First operand 877 states and 3488 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:46,766 INFO L93 Difference]: Finished difference Result 1631 states and 6370 transitions. [2021-06-05 15:02:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:02:46,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:46,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:46,769 INFO L225 Difference]: With dead ends: 1631 [2021-06-05 15:02:46,769 INFO L226 Difference]: Without dead ends: 1558 [2021-06-05 15:02:46,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 860.4ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:02:46,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2021-06-05 15:02:46,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 868. [2021-06-05 15:02:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:46,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-06-05 15:02:46,785 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-06-05 15:02:46,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:46,785 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-06-05 15:02:46,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:46,785 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-06-05 15:02:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:46,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:46,787 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:47,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:47,001 INFO L430 AbstractCegarLoop]: === Iteration 41 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:47,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:47,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1976988362, now seen corresponding path program 7 times [2021-06-05 15:02:47,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:47,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700920864] [2021-06-05 15:02:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:47,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:47,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700920864] [2021-06-05 15:02:47,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700920864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:47,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381196965] [2021-06-05 15:02:47,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:47,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:47,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:47,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:47,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:02:47,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:47,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:47,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:47,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:02:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:47,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381196965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:47,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:47,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:02:47,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550729936] [2021-06-05 15:02:47,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:02:47,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:47,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:02:47,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:47,346 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:47,654 INFO L93 Difference]: Finished difference Result 1431 states and 5615 transitions. [2021-06-05 15:02:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:02:47,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:47,656 INFO L225 Difference]: With dead ends: 1431 [2021-06-05 15:02:47,656 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 15:02:47,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:02:47,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 15:02:47,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 910. [2021-06-05 15:02:47,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.957095709570957) internal successors, (3597), 909 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3597 transitions. [2021-06-05 15:02:47,674 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3597 transitions. Word has length 26 [2021-06-05 15:02:47,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:47,675 INFO L482 AbstractCegarLoop]: Abstraction has 910 states and 3597 transitions. [2021-06-05 15:02:47,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,675 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3597 transitions. [2021-06-05 15:02:47,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:47,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:47,677 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:47,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:47,890 INFO L430 AbstractCegarLoop]: === Iteration 42 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:47,890 INFO L82 PathProgramCache]: Analyzing trace with hash -632551638, now seen corresponding path program 7 times [2021-06-05 15:02:47,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:47,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183871273] [2021-06-05 15:02:47,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:47,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:47,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183871273] [2021-06-05 15:02:47,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183871273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:47,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20173543] [2021-06-05 15:02:47,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:47,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:47,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:48,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:48,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:02:48,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:48,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:48,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:48,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:02:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:48,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20173543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:48,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:48,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:02:48,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702262468] [2021-06-05 15:02:48,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:02:48,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:48,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:02:48,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:48,187 INFO L87 Difference]: Start difference. First operand 910 states and 3597 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:48,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:48,537 INFO L93 Difference]: Finished difference Result 1481 states and 5795 transitions. [2021-06-05 15:02:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:02:48,537 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:48,540 INFO L225 Difference]: With dead ends: 1481 [2021-06-05 15:02:48,540 INFO L226 Difference]: Without dead ends: 1400 [2021-06-05 15:02:48,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:02:48,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-06-05 15:02:48,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 880. [2021-06-05 15:02:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.973833902161547) internal successors, (3493), 879 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3493 transitions. [2021-06-05 15:02:48,557 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3493 transitions. Word has length 26 [2021-06-05 15:02:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:48,557 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3493 transitions. [2021-06-05 15:02:48,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:48,557 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3493 transitions. [2021-06-05 15:02:48,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:48,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:48,559 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:48,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 15:02:48,781 INFO L430 AbstractCegarLoop]: === Iteration 43 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:48,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:48,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1675130104, now seen corresponding path program 8 times [2021-06-05 15:02:48,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:48,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377459664] [2021-06-05 15:02:48,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:48,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:48,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377459664] [2021-06-05 15:02:48,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377459664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:48,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258247537] [2021-06-05 15:02:48,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:48,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:48,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:48,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:02:48,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:48,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:48,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:48,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:48,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:48,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:48,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:02:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:49,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258247537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:49,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:49,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:02:49,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83583573] [2021-06-05 15:02:49,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:02:49,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:49,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:02:49,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:49,120 INFO L87 Difference]: Start difference. First operand 880 states and 3493 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:50,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:50,223 INFO L93 Difference]: Finished difference Result 1684 states and 6608 transitions. [2021-06-05 15:02:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:02:50,223 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:50,226 INFO L225 Difference]: With dead ends: 1684 [2021-06-05 15:02:50,226 INFO L226 Difference]: Without dead ends: 1611 [2021-06-05 15:02:50,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 803.1ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:02:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-06-05 15:02:50,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 889. [2021-06-05 15:02:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.975225225225225) internal successors, (3530), 888 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3530 transitions. [2021-06-05 15:02:50,245 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3530 transitions. Word has length 26 [2021-06-05 15:02:50,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:50,245 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3530 transitions. [2021-06-05 15:02:50,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3530 transitions. [2021-06-05 15:02:50,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:50,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:50,248 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:50,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:50,457 INFO L430 AbstractCegarLoop]: === Iteration 44 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:50,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:50,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1224250116, now seen corresponding path program 9 times [2021-06-05 15:02:50,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:50,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344041857] [2021-06-05 15:02:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:50,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:50,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344041857] [2021-06-05 15:02:50,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344041857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:50,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050180055] [2021-06-05 15:02:50,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:50,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:02:50,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:50,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:02:50,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:50,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:50,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:50,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:50,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:50,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:50,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:02:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:50,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050180055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:50,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:50,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:02:50,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745296080] [2021-06-05 15:02:50,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:02:50,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:50,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:02:50,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:02:50,786 INFO L87 Difference]: Start difference. First operand 889 states and 3530 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:51,972 INFO L93 Difference]: Finished difference Result 1684 states and 6639 transitions. [2021-06-05 15:02:51,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:02:51,972 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:51,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:51,974 INFO L225 Difference]: With dead ends: 1684 [2021-06-05 15:02:51,974 INFO L226 Difference]: Without dead ends: 1601 [2021-06-05 15:02:51,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 885.2ms TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:02:51,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-06-05 15:02:51,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 880. [2021-06-05 15:02:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.973833902161547) internal successors, (3493), 879 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3493 transitions. [2021-06-05 15:02:51,989 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3493 transitions. Word has length 26 [2021-06-05 15:02:51,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:51,989 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3493 transitions. [2021-06-05 15:02:51,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,989 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3493 transitions. [2021-06-05 15:02:51,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:51,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:51,991 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:52,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 15:02:52,191 INFO L430 AbstractCegarLoop]: === Iteration 45 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:52,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:52,192 INFO L82 PathProgramCache]: Analyzing trace with hash -371215704, now seen corresponding path program 8 times [2021-06-05 15:02:52,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:52,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796306505] [2021-06-05 15:02:52,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:52,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:52,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796306505] [2021-06-05 15:02:52,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796306505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:52,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91304125] [2021-06-05 15:02:52,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:52,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:52,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:52,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:02:52,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:52,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:52,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:52,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:52,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:52,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:52,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:02:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:52,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91304125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:52,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:52,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:02:52,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642212708] [2021-06-05 15:02:52,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:02:52,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:52,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:02:52,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:02:52,555 INFO L87 Difference]: Start difference. First operand 880 states and 3493 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:53,841 INFO L93 Difference]: Finished difference Result 2501 states and 9470 transitions. [2021-06-05 15:02:53,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:02:53,841 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:53,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:53,845 INFO L225 Difference]: With dead ends: 2501 [2021-06-05 15:02:53,845 INFO L226 Difference]: Without dead ends: 2228 [2021-06-05 15:02:53,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 998.6ms TimeCoverageRelationStatistics Valid=363, Invalid=1529, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:02:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-05 15:02:53,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 886. [2021-06-05 15:02:53,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.977401129943503) internal successors, (3520), 885 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3520 transitions. [2021-06-05 15:02:53,864 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3520 transitions. Word has length 26 [2021-06-05 15:02:53,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:53,864 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3520 transitions. [2021-06-05 15:02:53,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,864 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3520 transitions. [2021-06-05 15:02:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:53,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:53,866 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:54,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:54,066 INFO L430 AbstractCegarLoop]: === Iteration 46 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:54,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:54,067 INFO L82 PathProgramCache]: Analyzing trace with hash -903972686, now seen corresponding path program 9 times [2021-06-05 15:02:54,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:54,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407711558] [2021-06-05 15:02:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:54,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:54,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407711558] [2021-06-05 15:02:54,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407711558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:54,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479485088] [2021-06-05 15:02:54,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:54,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:02:54,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:54,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:02:54,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:54,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:54,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:54,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:54,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:54,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:54,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:02:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:54,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479485088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:54,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:54,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:02:54,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513805926] [2021-06-05 15:02:54,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:02:54,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:54,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:02:54,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:02:54,426 INFO L87 Difference]: Start difference. First operand 886 states and 3520 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:55,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:55,703 INFO L93 Difference]: Finished difference Result 2590 states and 9786 transitions. [2021-06-05 15:02:55,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:02:55,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:55,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:55,707 INFO L225 Difference]: With dead ends: 2590 [2021-06-05 15:02:55,707 INFO L226 Difference]: Without dead ends: 2318 [2021-06-05 15:02:55,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 953.3ms TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:02:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-06-05 15:02:55,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 871. [2021-06-05 15:02:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.9770114942528734) internal successors, (3460), 870 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 3460 transitions. [2021-06-05 15:02:55,725 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 3460 transitions. Word has length 26 [2021-06-05 15:02:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:55,726 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 3460 transitions. [2021-06-05 15:02:55,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:55,726 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 3460 transitions. [2021-06-05 15:02:55,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:55,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:55,727 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:55,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:55,928 INFO L430 AbstractCegarLoop]: === Iteration 47 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:55,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:55,928 INFO L82 PathProgramCache]: Analyzing trace with hash 2100006690, now seen corresponding path program 10 times [2021-06-05 15:02:55,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:55,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813796976] [2021-06-05 15:02:55,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:55,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:56,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:56,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813796976] [2021-06-05 15:02:56,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813796976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:56,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187379633] [2021-06-05 15:02:56,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:56,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:56,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:56,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:56,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:56,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:56,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:02:56,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:56,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:56,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:56,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:02:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:56,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187379633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:56,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:56,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:02:56,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158744307] [2021-06-05 15:02:56,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:02:56,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:56,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:02:56,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:56,234 INFO L87 Difference]: Start difference. First operand 871 states and 3460 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:56,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:56,780 INFO L93 Difference]: Finished difference Result 1975 states and 7789 transitions. [2021-06-05 15:02:56,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:02:56,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:56,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:56,785 INFO L225 Difference]: With dead ends: 1975 [2021-06-05 15:02:56,785 INFO L226 Difference]: Without dead ends: 1894 [2021-06-05 15:02:56,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 269.6ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:02:56,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-06-05 15:02:56,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 911. [2021-06-05 15:02:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.9472527472527474) internal successors, (3592), 910 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3592 transitions. [2021-06-05 15:02:56,805 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3592 transitions. Word has length 26 [2021-06-05 15:02:56,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:56,805 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 3592 transitions. [2021-06-05 15:02:56,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:56,805 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3592 transitions. [2021-06-05 15:02:56,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:56,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:56,807 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:57,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 15:02:57,007 INFO L430 AbstractCegarLoop]: === Iteration 48 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:57,007 INFO L82 PathProgramCache]: Analyzing trace with hash -509533310, now seen corresponding path program 10 times [2021-06-05 15:02:57,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:57,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663954325] [2021-06-05 15:02:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:57,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:57,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663954325] [2021-06-05 15:02:57,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663954325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:57,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732228849] [2021-06-05 15:02:57,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:57,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:57,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:57,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:57,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:57,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:57,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:02:57,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:57,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:57,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:57,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:02:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:57,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732228849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:57,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:57,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:02:57,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176567444] [2021-06-05 15:02:57,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:02:57,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:57,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:02:57,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:57,296 INFO L87 Difference]: Start difference. First operand 911 states and 3592 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:57,755 INFO L93 Difference]: Finished difference Result 2026 states and 7973 transitions. [2021-06-05 15:02:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:02:57,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:57,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:57,758 INFO L225 Difference]: With dead ends: 2026 [2021-06-05 15:02:57,758 INFO L226 Difference]: Without dead ends: 1945 [2021-06-05 15:02:57,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:02:57,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-06-05 15:02:57,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 881. [2021-06-05 15:02:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.963636363636364) internal successors, (3488), 880 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 3488 transitions. [2021-06-05 15:02:57,774 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 3488 transitions. Word has length 26 [2021-06-05 15:02:57,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:57,774 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 3488 transitions. [2021-06-05 15:02:57,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,774 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 3488 transitions. [2021-06-05 15:02:57,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:57,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:57,775 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:57,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:57,976 INFO L430 AbstractCegarLoop]: === Iteration 49 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:57,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:57,976 INFO L82 PathProgramCache]: Analyzing trace with hash -203283562, now seen corresponding path program 7 times [2021-06-05 15:02:57,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:57,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949361591] [2021-06-05 15:02:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:58,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:58,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949361591] [2021-06-05 15:02:58,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949361591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:58,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262524459] [2021-06-05 15:02:58,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:58,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:58,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:58,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:58,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:02:58,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:58,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:58,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:58,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:02:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:58,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262524459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:58,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:58,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:02:58,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925015789] [2021-06-05 15:02:58,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:58,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:58,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:58,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:58,236 INFO L87 Difference]: Start difference. First operand 881 states and 3488 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:58,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:58,583 INFO L93 Difference]: Finished difference Result 1346 states and 5309 transitions. [2021-06-05 15:02:58,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:02:58,583 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:58,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:58,585 INFO L225 Difference]: With dead ends: 1346 [2021-06-05 15:02:58,585 INFO L226 Difference]: Without dead ends: 1273 [2021-06-05 15:02:58,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:02:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-06-05 15:02:58,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 902. [2021-06-05 15:02:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.9644839067702553) internal successors, (3572), 901 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3572 transitions. [2021-06-05 15:02:58,598 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3572 transitions. Word has length 26 [2021-06-05 15:02:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:58,599 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3572 transitions. [2021-06-05 15:02:58,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3572 transitions. [2021-06-05 15:02:58,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:58,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:58,600 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:58,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 15:02:58,801 INFO L430 AbstractCegarLoop]: === Iteration 50 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:58,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:58,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1322787516, now seen corresponding path program 8 times [2021-06-05 15:02:58,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:58,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013383575] [2021-06-05 15:02:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:58,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:58,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013383575] [2021-06-05 15:02:58,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013383575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:58,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343799818] [2021-06-05 15:02:58,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:58,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:58,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:58,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:58,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:59,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:59,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:02:59,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:59,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:59,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:59,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:02:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:59,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343799818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:59,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:59,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:02:59,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632722649] [2021-06-05 15:02:59,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:59,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:59,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:59,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:59,086 INFO L87 Difference]: Start difference. First operand 902 states and 3572 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:59,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:59,388 INFO L93 Difference]: Finished difference Result 1342 states and 5292 transitions. [2021-06-05 15:02:59,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:02:59,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:02:59,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:59,390 INFO L225 Difference]: With dead ends: 1342 [2021-06-05 15:02:59,390 INFO L226 Difference]: Without dead ends: 1267 [2021-06-05 15:02:59,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:02:59,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-05 15:02:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 893. [2021-06-05 15:02:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.9618834080717487) internal successors, (3534), 892 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3534 transitions. [2021-06-05 15:02:59,404 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3534 transitions. Word has length 26 [2021-06-05 15:02:59,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:59,404 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3534 transitions. [2021-06-05 15:02:59,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3534 transitions. [2021-06-05 15:02:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:02:59,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:59,407 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:59,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:59,623 INFO L430 AbstractCegarLoop]: === Iteration 51 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:59,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1085704182, now seen corresponding path program 7 times [2021-06-05 15:02:59,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:59,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358324411] [2021-06-05 15:02:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:59,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:59,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358324411] [2021-06-05 15:02:59,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358324411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:59,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845200804] [2021-06-05 15:02:59,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:59,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:59,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:59,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:02:59,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:02:59,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:59,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:59,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:59,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:02:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:59,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845200804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:59,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:59,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:02:59,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375991393] [2021-06-05 15:02:59,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:59,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:59,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:59,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:59,891 INFO L87 Difference]: Start difference. First operand 893 states and 3534 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:00,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:00,272 INFO L93 Difference]: Finished difference Result 1390 states and 5478 transitions. [2021-06-05 15:03:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:03:00,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:00,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:00,275 INFO L225 Difference]: With dead ends: 1390 [2021-06-05 15:03:00,275 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 15:03:00,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 15:03:00,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 902. [2021-06-05 15:03:00,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.9633740288568258) internal successors, (3571), 901 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:00,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3571 transitions. [2021-06-05 15:03:00,291 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3571 transitions. Word has length 26 [2021-06-05 15:03:00,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:00,292 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3571 transitions. [2021-06-05 15:03:00,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:00,292 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3571 transitions. [2021-06-05 15:03:00,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:00,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:00,294 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:00,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 15:03:00,509 INFO L430 AbstractCegarLoop]: === Iteration 52 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:00,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:00,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1706188248, now seen corresponding path program 8 times [2021-06-05 15:03:00,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:00,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832652064] [2021-06-05 15:03:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:00,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:00,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832652064] [2021-06-05 15:03:00,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832652064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:00,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742954931] [2021-06-05 15:03:00,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:00,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:00,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:00,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:00,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:00,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:00,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:00,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:00,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:00,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:00,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 15:03:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:00,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742954931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:00,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:00,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 15:03:00,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558275346] [2021-06-05 15:03:00,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:00,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:00,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:00,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:00,859 INFO L87 Difference]: Start difference. First operand 902 states and 3571 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:01,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:01,654 INFO L93 Difference]: Finished difference Result 1438 states and 5653 transitions. [2021-06-05 15:03:01,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:03:01,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:01,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:01,656 INFO L225 Difference]: With dead ends: 1438 [2021-06-05 15:03:01,656 INFO L226 Difference]: Without dead ends: 1365 [2021-06-05 15:03:01,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 576.1ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:03:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-06-05 15:03:01,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 893. [2021-06-05 15:03:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.9618834080717487) internal successors, (3534), 892 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3534 transitions. [2021-06-05 15:03:01,669 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3534 transitions. Word has length 26 [2021-06-05 15:03:01,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:01,669 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3534 transitions. [2021-06-05 15:03:01,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:01,670 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3534 transitions. [2021-06-05 15:03:01,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:01,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:01,671 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:01,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:01,871 INFO L430 AbstractCegarLoop]: === Iteration 53 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:01,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1093393702, now seen corresponding path program 9 times [2021-06-05 15:03:01,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:01,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618824282] [2021-06-05 15:03:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:01,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:01,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618824282] [2021-06-05 15:03:01,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618824282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:01,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503735591] [2021-06-05 15:03:01,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:01,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:01,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:01,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:01,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:02,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:02,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:03:02,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:02,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:02,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:02,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:03:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:02,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503735591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:02,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:02,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:02,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660385465] [2021-06-05 15:03:02,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:02,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:02,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:02,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:02,131 INFO L87 Difference]: Start difference. First operand 893 states and 3534 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:02,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:02,475 INFO L93 Difference]: Finished difference Result 1359 states and 5336 transitions. [2021-06-05 15:03:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:03:02,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:02,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:02,477 INFO L225 Difference]: With dead ends: 1359 [2021-06-05 15:03:02,477 INFO L226 Difference]: Without dead ends: 1288 [2021-06-05 15:03:02,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-05 15:03:02,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 917. [2021-06-05 15:03:02,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 3.947598253275109) internal successors, (3616), 916 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:02,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 3616 transitions. [2021-06-05 15:03:02,498 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 3616 transitions. Word has length 26 [2021-06-05 15:03:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:02,499 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 3616 transitions. [2021-06-05 15:03:02,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:02,499 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 3616 transitions. [2021-06-05 15:03:02,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:02,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:02,501 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:02,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:02,713 INFO L430 AbstractCegarLoop]: === Iteration 54 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash -227738250, now seen corresponding path program 9 times [2021-06-05 15:03:02,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:02,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649633867] [2021-06-05 15:03:02,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:02,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:02,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649633867] [2021-06-05 15:03:02,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649633867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:02,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922687851] [2021-06-05 15:03:02,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:02,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:03:02,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:02,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:02,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:02,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:02,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:03:02,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:02,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:02,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:02,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:03:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:03,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922687851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:03,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:03,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:03:03,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723945836] [2021-06-05 15:03:03,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:03,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:03,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:03,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:03,012 INFO L87 Difference]: Start difference. First operand 917 states and 3616 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:03,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:03,382 INFO L93 Difference]: Finished difference Result 1400 states and 5483 transitions. [2021-06-05 15:03:03,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:03:03,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:03,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:03,385 INFO L225 Difference]: With dead ends: 1400 [2021-06-05 15:03:03,385 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 15:03:03,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 236.4ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:03,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 15:03:03,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 884. [2021-06-05 15:03:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.9614949037372593) internal successors, (3498), 883 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3498 transitions. [2021-06-05 15:03:03,402 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3498 transitions. Word has length 26 [2021-06-05 15:03:03,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:03,402 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3498 transitions. [2021-06-05 15:03:03,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3498 transitions. [2021-06-05 15:03:03,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:03,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:03,404 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:03,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 15:03:03,627 INFO L430 AbstractCegarLoop]: === Iteration 55 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:03,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:03,627 INFO L82 PathProgramCache]: Analyzing trace with hash -55965950, now seen corresponding path program 10 times [2021-06-05 15:03:03,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:03,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127796714] [2021-06-05 15:03:03,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:03,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:03,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127796714] [2021-06-05 15:03:03,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127796714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:03,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736859977] [2021-06-05 15:03:03,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:03,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:03,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:03,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:03,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:03,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:03:03,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:03,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:03,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:03,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:03:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:03,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736859977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:03,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:03,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:03:03,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353988449] [2021-06-05 15:03:03,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:03,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:03,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:03,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:03,991 INFO L87 Difference]: Start difference. First operand 884 states and 3498 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:04,378 INFO L93 Difference]: Finished difference Result 1728 states and 6709 transitions. [2021-06-05 15:03:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:03:04,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:04,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:04,381 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 15:03:04,381 INFO L226 Difference]: Without dead ends: 1657 [2021-06-05 15:03:04,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:03:04,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-06-05 15:03:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 916. [2021-06-05 15:03:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.9366120218579237) internal successors, (3602), 915 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3602 transitions. [2021-06-05 15:03:04,398 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3602 transitions. Word has length 26 [2021-06-05 15:03:04,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:04,398 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 3602 transitions. [2021-06-05 15:03:04,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:04,398 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3602 transitions. [2021-06-05 15:03:04,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:04,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:04,400 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:04,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:04,601 INFO L430 AbstractCegarLoop]: === Iteration 56 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:04,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:04,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1629461346, now seen corresponding path program 10 times [2021-06-05 15:03:04,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:04,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589301599] [2021-06-05 15:03:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:04,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:04,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589301599] [2021-06-05 15:03:04,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589301599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:04,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772645489] [2021-06-05 15:03:04,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:04,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:04,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:04,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:04,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:04,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:04,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:03:04,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:04,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:04,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:04,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:03:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:04,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772645489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:04,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:04,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:03:04,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613166231] [2021-06-05 15:03:04,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:04,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:04,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:04,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:04,894 INFO L87 Difference]: Start difference. First operand 916 states and 3602 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:05,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:05,296 INFO L93 Difference]: Finished difference Result 1770 states and 6860 transitions. [2021-06-05 15:03:05,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:03:05,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:05,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:05,300 INFO L225 Difference]: With dead ends: 1770 [2021-06-05 15:03:05,300 INFO L226 Difference]: Without dead ends: 1699 [2021-06-05 15:03:05,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:03:05,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-06-05 15:03:05,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 884. [2021-06-05 15:03:05,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.9614949037372593) internal successors, (3498), 883 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3498 transitions. [2021-06-05 15:03:05,315 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3498 transitions. Word has length 26 [2021-06-05 15:03:05,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:05,315 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3498 transitions. [2021-06-05 15:03:05,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:05,315 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3498 transitions. [2021-06-05 15:03:05,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:05,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:05,317 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:05,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 15:03:05,517 INFO L430 AbstractCegarLoop]: === Iteration 57 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:05,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:05,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1871455264, now seen corresponding path program 11 times [2021-06-05 15:03:05,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:05,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091387785] [2021-06-05 15:03:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:05,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:05,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091387785] [2021-06-05 15:03:05,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091387785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:05,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526507719] [2021-06-05 15:03:05,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:05,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:05,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:05,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:05,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:05,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:05,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:05,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:05,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:05,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:05,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 15:03:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:05,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526507719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:05,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:05,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:03:05,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845920620] [2021-06-05 15:03:05,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:05,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:05,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:05,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:05,775 INFO L87 Difference]: Start difference. First operand 884 states and 3498 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:05,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:05,971 INFO L93 Difference]: Finished difference Result 1351 states and 5290 transitions. [2021-06-05 15:03:05,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:05,972 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:05,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:05,974 INFO L225 Difference]: With dead ends: 1351 [2021-06-05 15:03:05,974 INFO L226 Difference]: Without dead ends: 1270 [2021-06-05 15:03:05,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 196.4ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-06-05 15:03:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 923. [2021-06-05 15:03:05,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 3.9425162689804774) internal successors, (3635), 922 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:05,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 3635 transitions. [2021-06-05 15:03:05,987 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 3635 transitions. Word has length 26 [2021-06-05 15:03:05,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:05,987 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 3635 transitions. [2021-06-05 15:03:05,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:05,987 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 3635 transitions. [2021-06-05 15:03:05,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:05,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:05,989 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:06,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:06,189 INFO L430 AbstractCegarLoop]: === Iteration 58 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:06,190 INFO L82 PathProgramCache]: Analyzing trace with hash -186027968, now seen corresponding path program 11 times [2021-06-05 15:03:06,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:06,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638022548] [2021-06-05 15:03:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:06,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:06,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638022548] [2021-06-05 15:03:06,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638022548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:06,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773080734] [2021-06-05 15:03:06,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:06,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:06,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:06,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:06,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:06,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:06,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:06,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:06,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:06,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:06,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 15:03:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:06,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773080734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:06,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:06,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 15:03:06,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557066899] [2021-06-05 15:03:06,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:06,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:06,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:06,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:06,441 INFO L87 Difference]: Start difference. First operand 923 states and 3635 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:06,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:06,973 INFO L93 Difference]: Finished difference Result 1488 states and 5810 transitions. [2021-06-05 15:03:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:03:06,973 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:06,976 INFO L225 Difference]: With dead ends: 1488 [2021-06-05 15:03:06,976 INFO L226 Difference]: Without dead ends: 1407 [2021-06-05 15:03:06,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:03:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-06-05 15:03:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 893. [2021-06-05 15:03:06,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.958520179372197) internal successors, (3531), 892 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:07,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3531 transitions. [2021-06-05 15:03:07,001 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3531 transitions. Word has length 26 [2021-06-05 15:03:07,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:07,001 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3531 transitions. [2021-06-05 15:03:07,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:07,001 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3531 transitions. [2021-06-05 15:03:07,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:07,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:07,003 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:07,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 15:03:07,203 INFO L430 AbstractCegarLoop]: === Iteration 59 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:07,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:07,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1228606434, now seen corresponding path program 12 times [2021-06-05 15:03:07,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:07,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204332061] [2021-06-05 15:03:07,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:07,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:07,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204332061] [2021-06-05 15:03:07,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204332061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:07,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59539120] [2021-06-05 15:03:07,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:07,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:03:07,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:07,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:07,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:07,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:07,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:07,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:07,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:07,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:07,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:07,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59539120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:07,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:07,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:03:07,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180013618] [2021-06-05 15:03:07,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:07,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:07,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:07,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:07,561 INFO L87 Difference]: Start difference. First operand 893 states and 3531 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:09,709 INFO L93 Difference]: Finished difference Result 2041 states and 7758 transitions. [2021-06-05 15:03:09,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:03:09,709 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:09,713 INFO L225 Difference]: With dead ends: 2041 [2021-06-05 15:03:09,713 INFO L226 Difference]: Without dead ends: 1882 [2021-06-05 15:03:09,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1614.6ms TimeCoverageRelationStatistics Valid=641, Invalid=2551, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:03:09,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-06-05 15:03:09,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 928. [2021-06-05 15:03:09,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.95361380798274) internal successors, (3665), 927 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3665 transitions. [2021-06-05 15:03:09,729 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3665 transitions. Word has length 26 [2021-06-05 15:03:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:09,729 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3665 transitions. [2021-06-05 15:03:09,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:09,729 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3665 transitions. [2021-06-05 15:03:09,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:09,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:09,731 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:09,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:09,931 INFO L430 AbstractCegarLoop]: === Iteration 60 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:09,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:09,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1670773786, now seen corresponding path program 13 times [2021-06-05 15:03:09,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:09,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102236867] [2021-06-05 15:03:09,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:10,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:10,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102236867] [2021-06-05 15:03:10,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102236867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:10,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617902517] [2021-06-05 15:03:10,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:10,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:10,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:10,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:10,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:10,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:10,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:10,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:10,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:10,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617902517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:10,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:10,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:10,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608391762] [2021-06-05 15:03:10,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:10,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:10,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:10,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:10,156 INFO L87 Difference]: Start difference. First operand 928 states and 3665 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:10,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:10,368 INFO L93 Difference]: Finished difference Result 1338 states and 5244 transitions. [2021-06-05 15:03:10,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:10,368 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:10,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:10,370 INFO L225 Difference]: With dead ends: 1338 [2021-06-05 15:03:10,370 INFO L226 Difference]: Without dead ends: 1255 [2021-06-05 15:03:10,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:10,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-05 15:03:10,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 925. [2021-06-05 15:03:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 3.955627705627706) internal successors, (3655), 924 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 3655 transitions. [2021-06-05 15:03:10,383 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 3655 transitions. Word has length 26 [2021-06-05 15:03:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:10,383 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 3655 transitions. [2021-06-05 15:03:10,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 3655 transitions. [2021-06-05 15:03:10,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:10,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:10,384 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:10,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:10,587 INFO L430 AbstractCegarLoop]: === Iteration 61 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:10,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:10,587 INFO L82 PathProgramCache]: Analyzing trace with hash 75307966, now seen corresponding path program 12 times [2021-06-05 15:03:10,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:10,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029995869] [2021-06-05 15:03:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:03:10,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:10,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029995869] [2021-06-05 15:03:10,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029995869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:10,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271889234] [2021-06-05 15:03:10,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:10,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:03:10,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:10,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:10,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:10,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:10,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:10,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:10,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:10,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:10,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:10,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271889234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:10,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:10,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:03:10,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930088659] [2021-06-05 15:03:10,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:10,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:10,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:10,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:10,921 INFO L87 Difference]: Start difference. First operand 925 states and 3655 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:11,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:11,780 INFO L93 Difference]: Finished difference Result 2198 states and 8311 transitions. [2021-06-05 15:03:11,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:03:11,781 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:11,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:11,784 INFO L225 Difference]: With dead ends: 2198 [2021-06-05 15:03:11,784 INFO L226 Difference]: Without dead ends: 1925 [2021-06-05 15:03:11,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 639.8ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:03:11,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-06-05 15:03:11,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 925. [2021-06-05 15:03:11,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 3.955627705627706) internal successors, (3655), 924 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:11,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 3655 transitions. [2021-06-05 15:03:11,799 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 3655 transitions. Word has length 26 [2021-06-05 15:03:11,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:11,799 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 3655 transitions. [2021-06-05 15:03:11,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:11,800 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 3655 transitions. [2021-06-05 15:03:11,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:11,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:11,801 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:12,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 15:03:12,002 INFO L430 AbstractCegarLoop]: === Iteration 62 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:12,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:12,002 INFO L82 PathProgramCache]: Analyzing trace with hash -457449016, now seen corresponding path program 13 times [2021-06-05 15:03:12,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:12,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365928089] [2021-06-05 15:03:12,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:03:12,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:12,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365928089] [2021-06-05 15:03:12,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365928089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:12,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604063687] [2021-06-05 15:03:12,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:12,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:12,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:12,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:12,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:12,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:12,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:12,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:12,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:12,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604063687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:12,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:12,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:12,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955848511] [2021-06-05 15:03:12,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:12,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:12,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:12,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:12,223 INFO L87 Difference]: Start difference. First operand 925 states and 3655 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:12,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:12,566 INFO L93 Difference]: Finished difference Result 1457 states and 5683 transitions. [2021-06-05 15:03:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:03:12,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:12,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:12,569 INFO L225 Difference]: With dead ends: 1457 [2021-06-05 15:03:12,569 INFO L226 Difference]: Without dead ends: 1367 [2021-06-05 15:03:12,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:12,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-06-05 15:03:12,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 922. [2021-06-05 15:03:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:12,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-05 15:03:12,587 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-05 15:03:12,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:12,587 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-05 15:03:12,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-05 15:03:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:12,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:12,589 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:12,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:12,805 INFO L430 AbstractCegarLoop]: === Iteration 63 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:12,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:12,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1340286744, now seen corresponding path program 11 times [2021-06-05 15:03:12,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:12,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049402103] [2021-06-05 15:03:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:12,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:12,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049402103] [2021-06-05 15:03:12,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049402103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:12,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654047799] [2021-06-05 15:03:12,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:12,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:03:12,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:12,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:12,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:12,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:12,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:12,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:12,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:12,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:12,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:13,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654047799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:13,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:13,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:13,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288454542] [2021-06-05 15:03:13,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:13,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:13,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:13,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:13,027 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:13,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:13,271 INFO L93 Difference]: Finished difference Result 1298 states and 5098 transitions. [2021-06-05 15:03:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:13,271 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:13,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:13,273 INFO L225 Difference]: With dead ends: 1298 [2021-06-05 15:03:13,274 INFO L226 Difference]: Without dead ends: 1225 [2021-06-05 15:03:13,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 154.0ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:13,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-05 15:03:13,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 940. [2021-06-05 15:03:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.961661341853035) internal successors, (3720), 939 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:13,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3720 transitions. [2021-06-05 15:03:13,286 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3720 transitions. Word has length 26 [2021-06-05 15:03:13,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:13,286 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3720 transitions. [2021-06-05 15:03:13,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:13,286 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3720 transitions. [2021-06-05 15:03:13,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:13,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:13,288 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:13,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 15:03:13,489 INFO L430 AbstractCegarLoop]: === Iteration 64 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:13,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:13,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1428609474, now seen corresponding path program 12 times [2021-06-05 15:03:13,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:13,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53826966] [2021-06-05 15:03:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:13,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:13,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53826966] [2021-06-05 15:03:13,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53826966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:13,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444479188] [2021-06-05 15:03:13,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:13,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:03:13,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:13,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:13,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:13,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:13,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:13,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:13,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:13,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:13,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-06-05 15:03:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:13,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444479188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:13,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:13,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 15:03:13,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069162378] [2021-06-05 15:03:13,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:03:13,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:13,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:03:13,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:03:13,747 INFO L87 Difference]: Start difference. First operand 940 states and 3720 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:14,765 INFO L93 Difference]: Finished difference Result 1722 states and 6769 transitions. [2021-06-05 15:03:14,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:03:14,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:14,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:14,769 INFO L225 Difference]: With dead ends: 1722 [2021-06-05 15:03:14,769 INFO L226 Difference]: Without dead ends: 1647 [2021-06-05 15:03:14,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 805.0ms TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:03:14,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-05 15:03:14,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 931. [2021-06-05 15:03:14,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-05 15:03:14,785 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-05 15:03:14,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:14,785 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-05 15:03:14,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,785 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-05 15:03:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:14,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:14,787 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:14,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 15:03:14,987 INFO L430 AbstractCegarLoop]: === Iteration 65 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:14,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:14,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1665692808, now seen corresponding path program 11 times [2021-06-05 15:03:14,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:14,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839249821] [2021-06-05 15:03:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:15,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:15,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839249821] [2021-06-05 15:03:15,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839249821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:15,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135575508] [2021-06-05 15:03:15,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:15,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:03:15,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:15,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:15,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:15,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:15,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:15,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:15,196 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.9 percent of original size [2021-06-05 15:03:15,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:15,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:13 [2021-06-05 15:03:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:15,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135575508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:15,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:15,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 15:03:15,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377826380] [2021-06-05 15:03:15,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:15,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:15,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:15,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:15,251 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:15,643 INFO L93 Difference]: Finished difference Result 1339 states and 5257 transitions. [2021-06-05 15:03:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:15,644 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:15,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:15,646 INFO L225 Difference]: With dead ends: 1339 [2021-06-05 15:03:15,646 INFO L226 Difference]: Without dead ends: 1257 [2021-06-05 15:03:15,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-06-05 15:03:15,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 940. [2021-06-05 15:03:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.9605963791267307) internal successors, (3719), 939 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3719 transitions. [2021-06-05 15:03:15,658 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3719 transitions. Word has length 26 [2021-06-05 15:03:15,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:15,659 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3719 transitions. [2021-06-05 15:03:15,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:15,659 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3719 transitions. [2021-06-05 15:03:15,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:15,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:15,660 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:15,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 15:03:15,861 INFO L430 AbstractCegarLoop]: === Iteration 66 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:15,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:15,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1045208742, now seen corresponding path program 12 times [2021-06-05 15:03:15,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:15,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918226719] [2021-06-05 15:03:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:15,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:15,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918226719] [2021-06-05 15:03:15,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918226719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:15,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65880522] [2021-06-05 15:03:15,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:15,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:03:15,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:15,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:15,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:16,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:16,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:16,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:16,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:16,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:16,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 15:03:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:16,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65880522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:16,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:16,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 15:03:16,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847156502] [2021-06-05 15:03:16,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:03:16,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:16,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:03:16,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:03:16,098 INFO L87 Difference]: Start difference. First operand 940 states and 3719 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:16,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:16,537 INFO L93 Difference]: Finished difference Result 1443 states and 5632 transitions. [2021-06-05 15:03:16,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:03:16,537 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:16,539 INFO L225 Difference]: With dead ends: 1443 [2021-06-05 15:03:16,540 INFO L226 Difference]: Without dead ends: 1370 [2021-06-05 15:03:16,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 329.1ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:03:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-06-05 15:03:16,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 931. [2021-06-05 15:03:16,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:16,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-05 15:03:16,556 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-05 15:03:16,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:16,556 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-05 15:03:16,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:16,556 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-05 15:03:16,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:16,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:16,557 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:16,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 15:03:16,760 INFO L430 AbstractCegarLoop]: === Iteration 67 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:16,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:16,760 INFO L82 PathProgramCache]: Analyzing trace with hash 450176604, now seen corresponding path program 13 times [2021-06-05 15:03:16,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:16,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679436163] [2021-06-05 15:03:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:16,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:16,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679436163] [2021-06-05 15:03:16,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679436163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:16,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802193415] [2021-06-05 15:03:16,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:16,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:16,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:16,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:16,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:16,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:16,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:16,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:16,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 15:03:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:16,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802193415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:16,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:16,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:16,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828096652] [2021-06-05 15:03:16,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:16,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:16,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:16,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:16,983 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:17,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:17,252 INFO L93 Difference]: Finished difference Result 1323 states and 5177 transitions. [2021-06-05 15:03:17,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:17,253 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:17,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:17,255 INFO L225 Difference]: With dead ends: 1323 [2021-06-05 15:03:17,255 INFO L226 Difference]: Without dead ends: 1252 [2021-06-05 15:03:17,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:17,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-06-05 15:03:17,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 955. [2021-06-05 15:03:17,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.9454926624737947) internal successors, (3764), 954 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:17,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3764 transitions. [2021-06-05 15:03:17,278 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3764 transitions. Word has length 26 [2021-06-05 15:03:17,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:17,279 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3764 transitions. [2021-06-05 15:03:17,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:17,279 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3764 transitions. [2021-06-05 15:03:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:17,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:17,281 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:17,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:17,503 INFO L430 AbstractCegarLoop]: === Iteration 68 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:17,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:17,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1315832056, now seen corresponding path program 13 times [2021-06-05 15:03:17,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:17,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091196025] [2021-06-05 15:03:17,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:17,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:17,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091196025] [2021-06-05 15:03:17,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091196025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:17,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151592207] [2021-06-05 15:03:17,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:17,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:17,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:17,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:17,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:17,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:17,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:17,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:17,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 15:03:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:17,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151592207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:17,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:17,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:03:17,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343119034] [2021-06-05 15:03:17,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:17,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:17,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:17,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:17,714 INFO L87 Difference]: Start difference. First operand 955 states and 3764 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:17,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:17,937 INFO L93 Difference]: Finished difference Result 1359 states and 5303 transitions. [2021-06-05 15:03:17,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:17,937 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:17,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:17,940 INFO L225 Difference]: With dead ends: 1359 [2021-06-05 15:03:17,940 INFO L226 Difference]: Without dead ends: 1288 [2021-06-05 15:03:17,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:17,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-05 15:03:17,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 922. [2021-06-05 15:03:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-05 15:03:17,970 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-05 15:03:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:17,971 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-05 15:03:17,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-05 15:03:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:17,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:17,972 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:18,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 15:03:18,173 INFO L430 AbstractCegarLoop]: === Iteration 69 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:18,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:18,173 INFO L82 PathProgramCache]: Analyzing trace with hash -903815988, now seen corresponding path program 14 times [2021-06-05 15:03:18,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:18,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541474381] [2021-06-05 15:03:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:18,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:18,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541474381] [2021-06-05 15:03:18,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541474381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:18,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414993720] [2021-06-05 15:03:18,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:18,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:18,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:18,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:18,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:18,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:18,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:18,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:18,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:18,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:18,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 15:03:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:18,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414993720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:18,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:18,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:03:18,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888846674] [2021-06-05 15:03:18,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:18,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:18,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:18,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:18,441 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:19,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:19,269 INFO L93 Difference]: Finished difference Result 1718 states and 6716 transitions. [2021-06-05 15:03:19,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:03:19,269 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:19,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:19,272 INFO L225 Difference]: With dead ends: 1718 [2021-06-05 15:03:19,272 INFO L226 Difference]: Without dead ends: 1645 [2021-06-05 15:03:19,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 520.0ms TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:03:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-06-05 15:03:19,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 958. [2021-06-05 15:03:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 3.941483803552769) internal successors, (3772), 957 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:19,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3772 transitions. [2021-06-05 15:03:19,286 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3772 transitions. Word has length 26 [2021-06-05 15:03:19,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:19,287 INFO L482 AbstractCegarLoop]: Abstraction has 958 states and 3772 transitions. [2021-06-05 15:03:19,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:19,287 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3772 transitions. [2021-06-05 15:03:19,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:19,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:19,288 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:19,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:19,489 INFO L430 AbstractCegarLoop]: === Iteration 70 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:19,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1614115146, now seen corresponding path program 14 times [2021-06-05 15:03:19,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:19,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259171630] [2021-06-05 15:03:19,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:19,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:19,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259171630] [2021-06-05 15:03:19,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259171630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:19,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101545248] [2021-06-05 15:03:19,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:19,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:19,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:19,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:19,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:19,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:19,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:19,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:19,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:19,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:19,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 15:03:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:19,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101545248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:19,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:19,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:03:19,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224533723] [2021-06-05 15:03:19,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:19,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:19,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:19,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:19,787 INFO L87 Difference]: Start difference. First operand 958 states and 3772 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:20,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:20,603 INFO L93 Difference]: Finished difference Result 1671 states and 6552 transitions. [2021-06-05 15:03:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:03:20,603 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:20,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:20,605 INFO L225 Difference]: With dead ends: 1671 [2021-06-05 15:03:20,605 INFO L226 Difference]: Without dead ends: 1598 [2021-06-05 15:03:20,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 532.5ms TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:03:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2021-06-05 15:03:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 931. [2021-06-05 15:03:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-05 15:03:20,620 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-05 15:03:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:20,620 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-05 15:03:20,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:20,620 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-05 15:03:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:20,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:20,621 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:20,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 15:03:20,822 INFO L430 AbstractCegarLoop]: === Iteration 71 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:20,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:20,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1878957560, now seen corresponding path program 15 times [2021-06-05 15:03:20,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:20,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881149149] [2021-06-05 15:03:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:20,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:20,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881149149] [2021-06-05 15:03:20,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881149149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:20,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320911189] [2021-06-05 15:03:20,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:20,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:03:20,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:20,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:20,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:20,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:20,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:20,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:20,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:20,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:20,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:21,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320911189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:21,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:21,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:03:21,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905309122] [2021-06-05 15:03:21,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:21,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:21,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:21,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:21,093 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:22,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:22,200 INFO L93 Difference]: Finished difference Result 1783 states and 6937 transitions. [2021-06-05 15:03:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:03:22,200 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:22,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:22,203 INFO L225 Difference]: With dead ends: 1783 [2021-06-05 15:03:22,203 INFO L226 Difference]: Without dead ends: 1710 [2021-06-05 15:03:22,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 815.5ms TimeCoverageRelationStatistics Valid=337, Invalid=1223, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:03:22,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-06-05 15:03:22,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 940. [2021-06-05 15:03:22,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.9605963791267307) internal successors, (3719), 939 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:22,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3719 transitions. [2021-06-05 15:03:22,218 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3719 transitions. Word has length 26 [2021-06-05 15:03:22,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:22,218 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3719 transitions. [2021-06-05 15:03:22,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:22,218 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3719 transitions. [2021-06-05 15:03:22,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:22,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:22,220 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:22,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:22,420 INFO L430 AbstractCegarLoop]: === Iteration 72 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:22,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2102483340, now seen corresponding path program 16 times [2021-06-05 15:03:22,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:22,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521198328] [2021-06-05 15:03:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:22,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:22,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521198328] [2021-06-05 15:03:22,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521198328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:22,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727756381] [2021-06-05 15:03:22,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:22,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:22,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:22,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:22,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:22,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:22,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:22,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:22,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:22,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:22,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:22,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727756381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:22,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:22,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:22,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682261552] [2021-06-05 15:03:22,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:22,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:22,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:22,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:22,634 INFO L87 Difference]: Start difference. First operand 940 states and 3719 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:22,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:22,881 INFO L93 Difference]: Finished difference Result 1357 states and 5334 transitions. [2021-06-05 15:03:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:22,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:22,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:22,883 INFO L225 Difference]: With dead ends: 1357 [2021-06-05 15:03:22,883 INFO L226 Difference]: Without dead ends: 1274 [2021-06-05 15:03:22,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-05 15:03:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 931. [2021-06-05 15:03:22,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-05 15:03:22,896 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-05 15:03:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:22,896 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-05 15:03:22,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-05 15:03:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:22,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:22,897 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:23,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 15:03:23,098 INFO L430 AbstractCegarLoop]: === Iteration 73 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:23,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:23,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1242984242, now seen corresponding path program 15 times [2021-06-05 15:03:23,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:23,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42861321] [2021-06-05 15:03:23,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:23,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:23,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42861321] [2021-06-05 15:03:23,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42861321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:23,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253332572] [2021-06-05 15:03:23,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:23,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:03:23,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:23,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:23,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:23,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:23,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:23,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:23,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:23,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:23,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:23,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253332572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:23,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:23,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:03:23,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102766549] [2021-06-05 15:03:23,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:23,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:23,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:23,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:23,388 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:24,155 INFO L93 Difference]: Finished difference Result 1660 states and 6502 transitions. [2021-06-05 15:03:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:24,155 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:24,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:24,158 INFO L225 Difference]: With dead ends: 1660 [2021-06-05 15:03:24,158 INFO L226 Difference]: Without dead ends: 1587 [2021-06-05 15:03:24,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 554.8ms TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:03:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-06-05 15:03:24,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 940. [2021-06-05 15:03:24,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.961661341853035) internal successors, (3720), 939 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:24,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3720 transitions. [2021-06-05 15:03:24,173 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3720 transitions. Word has length 26 [2021-06-05 15:03:24,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:24,173 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3720 transitions. [2021-06-05 15:03:24,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:24,173 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3720 transitions. [2021-06-05 15:03:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:24,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:24,175 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:24,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 15:03:24,393 INFO L430 AbstractCegarLoop]: === Iteration 74 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:24,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:24,393 INFO L82 PathProgramCache]: Analyzing trace with hash 786699224, now seen corresponding path program 16 times [2021-06-05 15:03:24,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:24,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070337291] [2021-06-05 15:03:24,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:24,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:24,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:24,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070337291] [2021-06-05 15:03:24,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070337291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:24,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367259491] [2021-06-05 15:03:24,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:24,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:24,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:24,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:24,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:24,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:24,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:24,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:24,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:24,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:24,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:24,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367259491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:24,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:24,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:24,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165257426] [2021-06-05 15:03:24,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:24,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:24,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:24,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:24,601 INFO L87 Difference]: Start difference. First operand 940 states and 3720 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:24,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:24,835 INFO L93 Difference]: Finished difference Result 1301 states and 5111 transitions. [2021-06-05 15:03:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:24,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:24,837 INFO L225 Difference]: With dead ends: 1301 [2021-06-05 15:03:24,837 INFO L226 Difference]: Without dead ends: 1226 [2021-06-05 15:03:24,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:24,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-06-05 15:03:24,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 922. [2021-06-05 15:03:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-05 15:03:24,854 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-05 15:03:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:24,854 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-05 15:03:24,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-05 15:03:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:24,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:24,856 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:25,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 15:03:25,077 INFO L430 AbstractCegarLoop]: === Iteration 75 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:25,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1972528020, now seen corresponding path program 14 times [2021-06-05 15:03:25,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:25,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101408076] [2021-06-05 15:03:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:25,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:25,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101408076] [2021-06-05 15:03:25,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101408076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:25,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228127261] [2021-06-05 15:03:25,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:25,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:25,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:25,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:25,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:25,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:25,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:03:25,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:25,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:25,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:25,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:03:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:25,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228127261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:25,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:25,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:25,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091178017] [2021-06-05 15:03:25,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:25,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:25,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:25,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:25,334 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:25,748 INFO L93 Difference]: Finished difference Result 1634 states and 6315 transitions. [2021-06-05 15:03:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:03:25,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:25,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:25,752 INFO L225 Difference]: With dead ends: 1634 [2021-06-05 15:03:25,752 INFO L226 Difference]: Without dead ends: 1543 [2021-06-05 15:03:25,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-06-05 15:03:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 964. [2021-06-05 15:03:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 3.936656282450675) internal successors, (3791), 963 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3791 transitions. [2021-06-05 15:03:25,766 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3791 transitions. Word has length 26 [2021-06-05 15:03:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:25,766 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 3791 transitions. [2021-06-05 15:03:25,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:25,766 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3791 transitions. [2021-06-05 15:03:25,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:25,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:25,767 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:25,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 15:03:25,968 INFO L430 AbstractCegarLoop]: === Iteration 76 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:25,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:25,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1612140118, now seen corresponding path program 14 times [2021-06-05 15:03:25,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:25,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547642644] [2021-06-05 15:03:25,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:26,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:26,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547642644] [2021-06-05 15:03:26,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547642644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:26,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904463710] [2021-06-05 15:03:26,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:26,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:26,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:26,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:26,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:26,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:26,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:26,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:26,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:26,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:26,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-06-05 15:03:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:26,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904463710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:26,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:26,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 15:03:26,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110114146] [2021-06-05 15:03:26,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:03:26,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:26,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:03:26,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:03:26,233 INFO L87 Difference]: Start difference. First operand 964 states and 3791 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:27,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:27,003 INFO L93 Difference]: Finished difference Result 1767 states and 6932 transitions. [2021-06-05 15:03:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:03:27,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:27,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:27,006 INFO L225 Difference]: With dead ends: 1767 [2021-06-05 15:03:27,006 INFO L226 Difference]: Without dead ends: 1685 [2021-06-05 15:03:27,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 537.1ms TimeCoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:03:27,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-06-05 15:03:27,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 931. [2021-06-05 15:03:27,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-06-05 15:03:27,021 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-06-05 15:03:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:27,022 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-06-05 15:03:27,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:27,022 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-06-05 15:03:27,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:27,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:27,023 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:27,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 15:03:27,225 INFO L430 AbstractCegarLoop]: === Iteration 77 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:27,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:27,225 INFO L82 PathProgramCache]: Analyzing trace with hash -832793512, now seen corresponding path program 15 times [2021-06-05 15:03:27,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:27,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023447775] [2021-06-05 15:03:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:27,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:27,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023447775] [2021-06-05 15:03:27,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023447775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:27,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768328377] [2021-06-05 15:03:27,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:27,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:27,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:27,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:27,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:27,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:27,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:27,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:27,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:27,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:27,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 15:03:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:27,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768328377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:27,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:27,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 15:03:27,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059176436] [2021-06-05 15:03:27,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:27,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:27,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:27,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:27,541 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:28,218 INFO L93 Difference]: Finished difference Result 1732 states and 6724 transitions. [2021-06-05 15:03:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:03:28,219 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:28,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:28,221 INFO L225 Difference]: With dead ends: 1732 [2021-06-05 15:03:28,221 INFO L226 Difference]: Without dead ends: 1568 [2021-06-05 15:03:28,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:03:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-06-05 15:03:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 931. [2021-06-05 15:03:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-06-05 15:03:28,239 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-06-05 15:03:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:28,239 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-06-05 15:03:28,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:28,240 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-06-05 15:03:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:28,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:28,242 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:28,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:28,457 INFO L430 AbstractCegarLoop]: === Iteration 78 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:28,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:28,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1849695216, now seen corresponding path program 16 times [2021-06-05 15:03:28,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:28,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939365590] [2021-06-05 15:03:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:28,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:28,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939365590] [2021-06-05 15:03:28,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939365590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:28,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80907580] [2021-06-05 15:03:28,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:28,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:28,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:28,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:28,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:28,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:28,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:28,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:28,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:28,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:28,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:28,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80907580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:28,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:28,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:28,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202911589] [2021-06-05 15:03:28,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:28,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:28,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:28,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:28,732 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:29,073 INFO L93 Difference]: Finished difference Result 1446 states and 5660 transitions. [2021-06-05 15:03:29,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:03:29,074 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:29,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:29,077 INFO L225 Difference]: With dead ends: 1446 [2021-06-05 15:03:29,077 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 15:03:29,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 228.2ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:29,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 15:03:29,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 931. [2021-06-05 15:03:29,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-06-05 15:03:29,096 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-06-05 15:03:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:29,096 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-06-05 15:03:29,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,096 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-06-05 15:03:29,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:29,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:29,098 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:29,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 15:03:29,321 INFO L430 AbstractCegarLoop]: === Iteration 79 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:29,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:29,321 INFO L82 PathProgramCache]: Analyzing trace with hash 992583964, now seen corresponding path program 15 times [2021-06-05 15:03:29,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:29,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412035587] [2021-06-05 15:03:29,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:29,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:29,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412035587] [2021-06-05 15:03:29,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412035587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:29,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86214324] [2021-06-05 15:03:29,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:29,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:03:29,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:29,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:29,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:29,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:29,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:29,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:29,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:29,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:29,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-06-05 15:03:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:29,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86214324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:29,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:29,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 15:03:29,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27428971] [2021-06-05 15:03:29,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:03:29,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:29,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:03:29,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:03:29,583 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:30,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:30,576 INFO L93 Difference]: Finished difference Result 1803 states and 7103 transitions. [2021-06-05 15:03:30,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:03:30,576 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:30,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:30,579 INFO L225 Difference]: With dead ends: 1803 [2021-06-05 15:03:30,579 INFO L226 Difference]: Without dead ends: 1721 [2021-06-05 15:03:30,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 751.8ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:03:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-06-05 15:03:30,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 940. [2021-06-05 15:03:30,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.957401490947817) internal successors, (3716), 939 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:30,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3716 transitions. [2021-06-05 15:03:30,593 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3716 transitions. Word has length 26 [2021-06-05 15:03:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:30,593 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3716 transitions. [2021-06-05 15:03:30,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3716 transitions. [2021-06-05 15:03:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:30,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:30,594 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:30,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:30,796 INFO L430 AbstractCegarLoop]: === Iteration 80 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:30,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:30,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1536354800, now seen corresponding path program 16 times [2021-06-05 15:03:30,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:30,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116298508] [2021-06-05 15:03:30,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:30,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:30,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116298508] [2021-06-05 15:03:30,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116298508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:30,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550798786] [2021-06-05 15:03:30,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:30,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:30,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:30,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:30,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:30,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:30,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:30,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:30,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:30,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:30,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:31,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550798786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:31,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:31,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:31,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506584835] [2021-06-05 15:03:31,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:31,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:31,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:31,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:31,039 INFO L87 Difference]: Start difference. First operand 940 states and 3716 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:31,286 INFO L93 Difference]: Finished difference Result 1341 states and 5252 transitions. [2021-06-05 15:03:31,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:31,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:31,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:31,289 INFO L225 Difference]: With dead ends: 1341 [2021-06-05 15:03:31,289 INFO L226 Difference]: Without dead ends: 1268 [2021-06-05 15:03:31,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:31,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-06-05 15:03:31,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 922. [2021-06-05 15:03:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-05 15:03:31,307 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-05 15:03:31,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:31,307 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-05 15:03:31,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:31,308 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-05 15:03:31,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:31,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:31,309 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:31,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 15:03:31,531 INFO L430 AbstractCegarLoop]: === Iteration 81 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:31,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:31,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1371947268, now seen corresponding path program 17 times [2021-06-05 15:03:31,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:31,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409513728] [2021-06-05 15:03:31,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:31,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:31,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409513728] [2021-06-05 15:03:31,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409513728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:31,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457221909] [2021-06-05 15:03:31,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:31,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:31,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:31,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:31,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:31,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:31,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:03:31,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:31,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:31,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:31,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:03:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:31,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457221909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:31,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:31,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:31,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969127538] [2021-06-05 15:03:31,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:31,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:31,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:31,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:31,737 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:32,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:32,180 INFO L93 Difference]: Finished difference Result 1898 states and 7325 transitions. [2021-06-05 15:03:32,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:03:32,181 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:32,184 INFO L225 Difference]: With dead ends: 1898 [2021-06-05 15:03:32,184 INFO L226 Difference]: Without dead ends: 1825 [2021-06-05 15:03:32,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-06-05 15:03:32,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 972. [2021-06-05 15:03:32,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.9155509783728117) internal successors, (3802), 971 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 3802 transitions. [2021-06-05 15:03:32,198 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 3802 transitions. Word has length 26 [2021-06-05 15:03:32,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:32,198 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 3802 transitions. [2021-06-05 15:03:32,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:32,199 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 3802 transitions. [2021-06-05 15:03:32,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:32,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:32,200 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:32,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 15:03:32,400 INFO L430 AbstractCegarLoop]: === Iteration 82 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:32,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:32,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2082246426, now seen corresponding path program 17 times [2021-06-05 15:03:32,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:32,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973905107] [2021-06-05 15:03:32,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:32,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:32,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973905107] [2021-06-05 15:03:32,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973905107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:32,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447252317] [2021-06-05 15:03:32,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:32,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:32,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:32,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:32,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:32,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:32,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:03:32,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:32,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:32,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:32,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:03:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:32,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447252317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:32,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:32,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:32,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695672604] [2021-06-05 15:03:32,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:32,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:32,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:32,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:32,642 INFO L87 Difference]: Start difference. First operand 972 states and 3802 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:33,066 INFO L93 Difference]: Finished difference Result 1853 states and 7166 transitions. [2021-06-05 15:03:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:03:33,066 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:33,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:33,069 INFO L225 Difference]: With dead ends: 1853 [2021-06-05 15:03:33,069 INFO L226 Difference]: Without dead ends: 1780 [2021-06-05 15:03:33,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:33,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2021-06-05 15:03:33,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 945. [2021-06-05 15:03:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 3.9322033898305087) internal successors, (3712), 944 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 3712 transitions. [2021-06-05 15:03:33,083 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 3712 transitions. Word has length 26 [2021-06-05 15:03:33,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:33,083 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 3712 transitions. [2021-06-05 15:03:33,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:33,083 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 3712 transitions. [2021-06-05 15:03:33,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:33,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:33,085 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:33,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:33,285 INFO L430 AbstractCegarLoop]: === Iteration 83 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:33,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:33,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1901734716, now seen corresponding path program 18 times [2021-06-05 15:03:33,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:33,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508989795] [2021-06-05 15:03:33,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:33,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:33,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508989795] [2021-06-05 15:03:33,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508989795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:33,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042479550] [2021-06-05 15:03:33,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:33,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:03:33,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:33,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:33,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:33,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:33,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:33,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:33,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:33,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:33,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 15:03:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:33,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042479550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:33,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:33,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:03:33,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528737964] [2021-06-05 15:03:33,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:33,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:33,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:33,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:33,568 INFO L87 Difference]: Start difference. First operand 945 states and 3712 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:34,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:34,519 INFO L93 Difference]: Finished difference Result 1734 states and 6750 transitions. [2021-06-05 15:03:34,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:03:34,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:34,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:34,522 INFO L225 Difference]: With dead ends: 1734 [2021-06-05 15:03:34,522 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 15:03:34,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 568.6ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:03:34,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 15:03:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 981. [2021-06-05 15:03:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 3.916326530612245) internal successors, (3838), 980 states have internal predecessors, (3838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 3838 transitions. [2021-06-05 15:03:34,537 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 3838 transitions. Word has length 26 [2021-06-05 15:03:34,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:34,537 INFO L482 AbstractCegarLoop]: Abstraction has 981 states and 3838 transitions. [2021-06-05 15:03:34,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:34,537 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 3838 transitions. [2021-06-05 15:03:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:34,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:34,538 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:34,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:34,740 INFO L430 AbstractCegarLoop]: === Iteration 84 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:34,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1191435558, now seen corresponding path program 18 times [2021-06-05 15:03:34,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:34,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138367772] [2021-06-05 15:03:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:34,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:34,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138367772] [2021-06-05 15:03:34,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138367772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:34,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723985995] [2021-06-05 15:03:34,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:34,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:03:34,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:34,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:34,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:34,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:34,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:34,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:34,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:34,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:34,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 15:03:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:35,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723985995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:35,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:35,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:03:35,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302097685] [2021-06-05 15:03:35,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:35,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:35,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:35,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:35,059 INFO L87 Difference]: Start difference. First operand 981 states and 3838 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:35,918 INFO L93 Difference]: Finished difference Result 1687 states and 6586 transitions. [2021-06-05 15:03:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:03:35,919 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:35,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:35,921 INFO L225 Difference]: With dead ends: 1687 [2021-06-05 15:03:35,921 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 15:03:35,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 563.6ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:03:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 15:03:35,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 954. [2021-06-05 15:03:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.9328436516264427) internal successors, (3748), 953 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3748 transitions. [2021-06-05 15:03:35,936 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3748 transitions. Word has length 26 [2021-06-05 15:03:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:35,936 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3748 transitions. [2021-06-05 15:03:35,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3748 transitions. [2021-06-05 15:03:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:35,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:35,938 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:36,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 15:03:36,138 INFO L430 AbstractCegarLoop]: === Iteration 85 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:36,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:36,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1969961148, now seen corresponding path program 19 times [2021-06-05 15:03:36,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:36,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746001915] [2021-06-05 15:03:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:36,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:36,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746001915] [2021-06-05 15:03:36,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746001915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311965777] [2021-06-05 15:03:36,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:36,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:36,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:36,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:36,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:36,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:36,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:36,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:36,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:36,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311965777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:36,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:36,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946490300] [2021-06-05 15:03:36,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:36,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:36,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:36,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:36,352 INFO L87 Difference]: Start difference. First operand 954 states and 3748 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:36,640 INFO L93 Difference]: Finished difference Result 1477 states and 5784 transitions. [2021-06-05 15:03:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:03:36,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:36,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:36,642 INFO L225 Difference]: With dead ends: 1477 [2021-06-05 15:03:36,642 INFO L226 Difference]: Without dead ends: 1404 [2021-06-05 15:03:36,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:36,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-06-05 15:03:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 963. [2021-06-05 15:03:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9345114345114345) internal successors, (3785), 962 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3785 transitions. [2021-06-05 15:03:36,656 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3785 transitions. Word has length 26 [2021-06-05 15:03:36,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:36,656 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3785 transitions. [2021-06-05 15:03:36,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3785 transitions. [2021-06-05 15:03:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:36,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:36,658 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:36,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 15:03:36,858 INFO L430 AbstractCegarLoop]: === Iteration 86 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:36,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:36,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1656434752, now seen corresponding path program 20 times [2021-06-05 15:03:36,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:36,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840909273] [2021-06-05 15:03:36,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:36,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:36,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840909273] [2021-06-05 15:03:36,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840909273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235364408] [2021-06-05 15:03:36,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:36,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:36,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:36,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:36,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:37,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:37,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:37,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:37,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:37,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:37,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:37,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235364408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:37,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:37,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:03:37,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236661400] [2021-06-05 15:03:37,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:37,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:37,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:37,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:37,118 INFO L87 Difference]: Start difference. First operand 963 states and 3785 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:38,155 INFO L93 Difference]: Finished difference Result 1777 states and 6940 transitions. [2021-06-05 15:03:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:03:38,155 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:38,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:38,159 INFO L225 Difference]: With dead ends: 1777 [2021-06-05 15:03:38,159 INFO L226 Difference]: Without dead ends: 1694 [2021-06-05 15:03:38,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 702.2ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:03:38,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-06-05 15:03:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 954. [2021-06-05 15:03:38,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.9328436516264427) internal successors, (3748), 953 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3748 transitions. [2021-06-05 15:03:38,175 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3748 transitions. Word has length 26 [2021-06-05 15:03:38,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:38,175 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3748 transitions. [2021-06-05 15:03:38,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,175 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3748 transitions. [2021-06-05 15:03:38,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:38,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:38,177 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:38,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 15:03:38,393 INFO L430 AbstractCegarLoop]: === Iteration 87 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:38,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:38,393 INFO L82 PathProgramCache]: Analyzing trace with hash 796935654, now seen corresponding path program 19 times [2021-06-05 15:03:38,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:38,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725816266] [2021-06-05 15:03:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:38,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:38,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725816266] [2021-06-05 15:03:38,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725816266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:38,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339801793] [2021-06-05 15:03:38,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:38,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:38,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:38,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:38,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:38,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:38,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:38,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:38,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339801793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:38,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:38,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:38,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158868982] [2021-06-05 15:03:38,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:38,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:38,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:38,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:38,592 INFO L87 Difference]: Start difference. First operand 954 states and 3748 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:38,874 INFO L93 Difference]: Finished difference Result 1424 states and 5591 transitions. [2021-06-05 15:03:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:03:38,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:38,876 INFO L225 Difference]: With dead ends: 1424 [2021-06-05 15:03:38,876 INFO L226 Difference]: Without dead ends: 1351 [2021-06-05 15:03:38,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 168.9ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-06-05 15:03:38,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 963. [2021-06-05 15:03:38,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9355509355509355) internal successors, (3786), 962 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3786 transitions. [2021-06-05 15:03:38,889 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3786 transitions. Word has length 26 [2021-06-05 15:03:38,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:38,889 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3786 transitions. [2021-06-05 15:03:38,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,889 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3786 transitions. [2021-06-05 15:03:38,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:38,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:38,891 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:39,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 15:03:39,093 INFO L430 AbstractCegarLoop]: === Iteration 88 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:39,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:39,093 INFO L82 PathProgramCache]: Analyzing trace with hash 340650636, now seen corresponding path program 20 times [2021-06-05 15:03:39,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:39,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536080635] [2021-06-05 15:03:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:39,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:39,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536080635] [2021-06-05 15:03:39,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536080635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:39,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721134291] [2021-06-05 15:03:39,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:39,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:39,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:39,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:39,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:39,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:39,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:39,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:39,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:39,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:39,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:39,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721134291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:39,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:39,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:03:39,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437333213] [2021-06-05 15:03:39,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:39,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:39,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:39,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:39,360 INFO L87 Difference]: Start difference. First operand 963 states and 3786 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:40,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:40,410 INFO L93 Difference]: Finished difference Result 1706 states and 6660 transitions. [2021-06-05 15:03:40,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:03:40,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:40,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:40,413 INFO L225 Difference]: With dead ends: 1706 [2021-06-05 15:03:40,413 INFO L226 Difference]: Without dead ends: 1631 [2021-06-05 15:03:40,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 701.8ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:03:40,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-06-05 15:03:40,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 945. [2021-06-05 15:03:40,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 3.9322033898305087) internal successors, (3712), 944 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:40,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 3712 transitions. [2021-06-05 15:03:40,428 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 3712 transitions. Word has length 26 [2021-06-05 15:03:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:40,428 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 3712 transitions. [2021-06-05 15:03:40,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:40,428 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 3712 transitions. [2021-06-05 15:03:40,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:40,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:40,430 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:40,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 15:03:40,630 INFO L430 AbstractCegarLoop]: === Iteration 89 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:40,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:40,630 INFO L82 PathProgramCache]: Analyzing trace with hash -779527332, now seen corresponding path program 17 times [2021-06-05 15:03:40,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:40,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979612222] [2021-06-05 15:03:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:40,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:40,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979612222] [2021-06-05 15:03:40,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979612222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:40,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641390580] [2021-06-05 15:03:40,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:40,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:03:40,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:40,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:03:40,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:40,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:40,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:40,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:40,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:40,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:40,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-05 15:03:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:40,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641390580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:40,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:40,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 15:03:40,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501050675] [2021-06-05 15:03:40,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:40,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:40,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:40,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:40,935 INFO L87 Difference]: Start difference. First operand 945 states and 3712 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:41,693 INFO L93 Difference]: Finished difference Result 1955 states and 7444 transitions. [2021-06-05 15:03:41,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:03:41,693 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:41,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:41,696 INFO L225 Difference]: With dead ends: 1955 [2021-06-05 15:03:41,696 INFO L226 Difference]: Without dead ends: 1819 [2021-06-05 15:03:41,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 421.6ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:03:41,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2021-06-05 15:03:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 1022. [2021-06-05 15:03:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.853085210577865) internal successors, (3934), 1021 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3934 transitions. [2021-06-05 15:03:41,711 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3934 transitions. Word has length 26 [2021-06-05 15:03:41,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:41,711 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3934 transitions. [2021-06-05 15:03:41,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3934 transitions. [2021-06-05 15:03:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:41,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:41,712 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:41,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:41,913 INFO L430 AbstractCegarLoop]: === Iteration 90 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:41,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1489826490, now seen corresponding path program 17 times [2021-06-05 15:03:41,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:41,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3434572] [2021-06-05 15:03:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:41,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:41,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3434572] [2021-06-05 15:03:41,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3434572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:41,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897001591] [2021-06-05 15:03:41,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:42,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:42,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:42,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:42,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:42,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:42,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:03:42,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:42,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:42,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:42,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:03:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:42,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897001591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:42,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:42,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:42,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473629509] [2021-06-05 15:03:42,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:42,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:42,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:42,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:42,153 INFO L87 Difference]: Start difference. First operand 1022 states and 3934 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:42,615 INFO L93 Difference]: Finished difference Result 2154 states and 8372 transitions. [2021-06-05 15:03:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:03:42,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:42,619 INFO L225 Difference]: With dead ends: 2154 [2021-06-05 15:03:42,619 INFO L226 Difference]: Without dead ends: 2072 [2021-06-05 15:03:42,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 215.0ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:42,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-06-05 15:03:42,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1022. [2021-06-05 15:03:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.853085210577865) internal successors, (3934), 1021 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3934 transitions. [2021-06-05 15:03:42,649 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3934 transitions. Word has length 26 [2021-06-05 15:03:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:42,650 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3934 transitions. [2021-06-05 15:03:42,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3934 transitions. [2021-06-05 15:03:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:42,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:42,651 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:42,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:42,852 INFO L430 AbstractCegarLoop]: === Iteration 91 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:42,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:42,852 INFO L82 PathProgramCache]: Analyzing trace with hash 266522242, now seen corresponding path program 18 times [2021-06-05 15:03:42,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:42,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207926665] [2021-06-05 15:03:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:42,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:42,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207926665] [2021-06-05 15:03:42,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207926665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:42,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402133284] [2021-06-05 15:03:42,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:42,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:03:42,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:42,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:42,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:43,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:43,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:43,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:43,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:43,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:43,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 15:03:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:43,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402133284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:43,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:43,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 15:03:43,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599820422] [2021-06-05 15:03:43,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:43,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:43,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:43,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:43,110 INFO L87 Difference]: Start difference. First operand 1022 states and 3934 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:43,765 INFO L93 Difference]: Finished difference Result 2276 states and 8661 transitions. [2021-06-05 15:03:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:43,766 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:43,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:43,769 INFO L225 Difference]: With dead ends: 2276 [2021-06-05 15:03:43,769 INFO L226 Difference]: Without dead ends: 2112 [2021-06-05 15:03:43,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 420.2ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:03:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-06-05 15:03:43,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1064. [2021-06-05 15:03:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.83725305738476) internal successors, (4079), 1063 states have internal predecessors, (4079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 4079 transitions. [2021-06-05 15:03:43,786 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 4079 transitions. Word has length 26 [2021-06-05 15:03:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:43,786 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 4079 transitions. [2021-06-05 15:03:43,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 4079 transitions. [2021-06-05 15:03:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:43,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:43,787 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:43,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:43,988 INFO L430 AbstractCegarLoop]: === Iteration 92 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:43,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:43,988 INFO L82 PathProgramCache]: Analyzing trace with hash -443776916, now seen corresponding path program 18 times [2021-06-05 15:03:43,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:43,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049448123] [2021-06-05 15:03:43,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:44,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:44,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049448123] [2021-06-05 15:03:44,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049448123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:44,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938062677] [2021-06-05 15:03:44,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:44,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:03:44,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:44,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:44,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:44,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:44,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:44,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:44,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:44,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:44,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-06-05 15:03:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:44,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938062677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:44,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:44,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 15:03:44,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91941774] [2021-06-05 15:03:44,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:03:44,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:44,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:03:44,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:03:44,312 INFO L87 Difference]: Start difference. First operand 1064 states and 4079 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:45,158 INFO L93 Difference]: Finished difference Result 1786 states and 6915 transitions. [2021-06-05 15:03:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:03:45,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:45,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:45,162 INFO L225 Difference]: With dead ends: 1786 [2021-06-05 15:03:45,162 INFO L226 Difference]: Without dead ends: 1704 [2021-06-05 15:03:45,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 584.1ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:03:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2021-06-05 15:03:45,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1031. [2021-06-05 15:03:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 3.8514563106796116) internal successors, (3967), 1030 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3967 transitions. [2021-06-05 15:03:45,177 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3967 transitions. Word has length 26 [2021-06-05 15:03:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:45,177 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 3967 transitions. [2021-06-05 15:03:45,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3967 transitions. [2021-06-05 15:03:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:45,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:45,178 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:45,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 15:03:45,379 INFO L430 AbstractCegarLoop]: === Iteration 93 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:45,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:45,379 INFO L82 PathProgramCache]: Analyzing trace with hash 99242704, now seen corresponding path program 19 times [2021-06-05 15:03:45,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:45,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554459429] [2021-06-05 15:03:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:45,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:45,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554459429] [2021-06-05 15:03:45,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554459429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:45,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479424195] [2021-06-05 15:03:45,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:45,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:45,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:45,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:45,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:45,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:45,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:45,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:45,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:45,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479424195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:45,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:45,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:03:45,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910238178] [2021-06-05 15:03:45,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:45,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:45,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:45,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:45,632 INFO L87 Difference]: Start difference. First operand 1031 states and 3967 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:46,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:46,148 INFO L93 Difference]: Finished difference Result 1827 states and 7043 transitions. [2021-06-05 15:03:46,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:46,148 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:46,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:46,151 INFO L225 Difference]: With dead ends: 1827 [2021-06-05 15:03:46,151 INFO L226 Difference]: Without dead ends: 1736 [2021-06-05 15:03:46,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-05 15:03:46,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1031. [2021-06-05 15:03:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 3.8514563106796116) internal successors, (3967), 1030 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3967 transitions. [2021-06-05 15:03:46,174 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3967 transitions. Word has length 26 [2021-06-05 15:03:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:46,174 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 3967 transitions. [2021-06-05 15:03:46,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3967 transitions. [2021-06-05 15:03:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:46,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:46,175 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:46,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 15:03:46,376 INFO L430 AbstractCegarLoop]: === Iteration 94 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:46,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:46,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1513235864, now seen corresponding path program 20 times [2021-06-05 15:03:46,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:46,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134489554] [2021-06-05 15:03:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:46,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:46,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134489554] [2021-06-05 15:03:46,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134489554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:46,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497321001] [2021-06-05 15:03:46,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:46,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:46,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:46,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:46,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:46,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:46,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:46,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:46,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:46,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:46,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:46,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497321001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:46,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:46,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:03:46,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788412568] [2021-06-05 15:03:46,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:46,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:46,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:46,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:46,675 INFO L87 Difference]: Start difference. First operand 1031 states and 3967 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:47,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:47,264 INFO L93 Difference]: Finished difference Result 1786 states and 6895 transitions. [2021-06-05 15:03:47,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:03:47,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:47,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:47,267 INFO L225 Difference]: With dead ends: 1786 [2021-06-05 15:03:47,267 INFO L226 Difference]: Without dead ends: 1696 [2021-06-05 15:03:47,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 369.0ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:03:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-06-05 15:03:47,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1031. [2021-06-05 15:03:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 3.8514563106796116) internal successors, (3967), 1030 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3967 transitions. [2021-06-05 15:03:47,283 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3967 transitions. Word has length 26 [2021-06-05 15:03:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:47,283 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 3967 transitions. [2021-06-05 15:03:47,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3967 transitions. [2021-06-05 15:03:47,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:47,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:47,285 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:47,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 15:03:47,508 INFO L430 AbstractCegarLoop]: === Iteration 95 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:47,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:47,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1924620180, now seen corresponding path program 19 times [2021-06-05 15:03:47,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:47,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496386220] [2021-06-05 15:03:47,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:47,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:47,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:47,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496386220] [2021-06-05 15:03:47,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496386220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:47,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389680233] [2021-06-05 15:03:47,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:47,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:47,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:47,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:47,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:47,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:47,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:47,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:47,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:47,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389680233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:47,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:47,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:47,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417672670] [2021-06-05 15:03:47,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:47,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:47,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:47,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:47,730 INFO L87 Difference]: Start difference. First operand 1031 states and 3967 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:48,005 INFO L93 Difference]: Finished difference Result 1577 states and 6093 transitions. [2021-06-05 15:03:48,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:03:48,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:48,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:48,008 INFO L225 Difference]: With dead ends: 1577 [2021-06-05 15:03:48,008 INFO L226 Difference]: Without dead ends: 1495 [2021-06-05 15:03:48,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2021-06-05 15:03:48,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1040. [2021-06-05 15:03:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 3.8537054860442734) internal successors, (4004), 1039 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:48,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 4004 transitions. [2021-06-05 15:03:48,021 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 4004 transitions. Word has length 26 [2021-06-05 15:03:48,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:48,021 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 4004 transitions. [2021-06-05 15:03:48,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 4004 transitions. [2021-06-05 15:03:48,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:03:48,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:48,023 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:48,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:48,223 INFO L430 AbstractCegarLoop]: === Iteration 96 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:48,224 INFO L82 PathProgramCache]: Analyzing trace with hash -604318584, now seen corresponding path program 20 times [2021-06-05 15:03:48,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:48,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641414956] [2021-06-05 15:03:48,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:48,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:48,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641414956] [2021-06-05 15:03:48,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641414956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:48,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722959816] [2021-06-05 15:03:48,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:48,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:48,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:48,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:48,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:48,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:48,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:48,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:48,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:48,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:48,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722959816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:48,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:48,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:48,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986984018] [2021-06-05 15:03:48,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:48,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:48,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:48,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:48,453 INFO L87 Difference]: Start difference. First operand 1040 states and 4004 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:48,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:48,766 INFO L93 Difference]: Finished difference Result 1561 states and 6013 transitions. [2021-06-05 15:03:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:03:48,767 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:03:48,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:48,769 INFO L225 Difference]: With dead ends: 1561 [2021-06-05 15:03:48,769 INFO L226 Difference]: Without dead ends: 1488 [2021-06-05 15:03:48,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-06-05 15:03:48,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1022. [2021-06-05 15:03:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.853085210577865) internal successors, (3934), 1021 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3934 transitions. [2021-06-05 15:03:48,783 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3934 transitions. Word has length 26 [2021-06-05 15:03:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:48,783 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3934 transitions. [2021-06-05 15:03:48,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3934 transitions. [2021-06-05 15:03:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:48,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:48,784 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:48,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 15:03:48,985 INFO L430 AbstractCegarLoop]: === Iteration 97 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:48,985 INFO L82 PathProgramCache]: Analyzing trace with hash -424605, now seen corresponding path program 21 times [2021-06-05 15:03:48,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:48,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561530111] [2021-06-05 15:03:48,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:49,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:49,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561530111] [2021-06-05 15:03:49,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561530111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:49,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213282826] [2021-06-05 15:03:49,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:49,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:49,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:49,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:49,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:49,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213282826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:49,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:49,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:03:49,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946804495] [2021-06-05 15:03:49,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:03:49,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:49,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:03:49,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:03:49,111 INFO L87 Difference]: Start difference. First operand 1022 states and 3934 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:49,342 INFO L93 Difference]: Finished difference Result 3341 states and 12590 transitions. [2021-06-05 15:03:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:03:49,342 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:49,347 INFO L225 Difference]: With dead ends: 3341 [2021-06-05 15:03:49,347 INFO L226 Difference]: Without dead ends: 3164 [2021-06-05 15:03:49,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2021-06-05 15:03:49,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 1496. [2021-06-05 15:03:49,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 4.113043478260869) internal successors, (6149), 1495 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 6149 transitions. [2021-06-05 15:03:49,375 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 6149 transitions. Word has length 28 [2021-06-05 15:03:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:49,375 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 6149 transitions. [2021-06-05 15:03:49,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 6149 transitions. [2021-06-05 15:03:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:49,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:49,378 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:49,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:49,578 INFO L430 AbstractCegarLoop]: === Iteration 98 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:49,578 INFO L82 PathProgramCache]: Analyzing trace with hash 2039590629, now seen corresponding path program 22 times [2021-06-05 15:03:49,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:49,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260936421] [2021-06-05 15:03:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:49,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:49,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260936421] [2021-06-05 15:03:49,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260936421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:49,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710393772] [2021-06-05 15:03:49,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:49,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:49,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:49,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:49,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:49,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710393772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:49,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:49,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:03:49,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145556208] [2021-06-05 15:03:49,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:03:49,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:49,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:03:49,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:03:49,698 INFO L87 Difference]: Start difference. First operand 1496 states and 6149 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:49,905 INFO L93 Difference]: Finished difference Result 3298 states and 12722 transitions. [2021-06-05 15:03:49,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:03:49,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:49,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:49,910 INFO L225 Difference]: With dead ends: 3298 [2021-06-05 15:03:49,910 INFO L226 Difference]: Without dead ends: 3044 [2021-06-05 15:03:49,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2021-06-05 15:03:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 1857. [2021-06-05 15:03:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 4.1438577586206895) internal successors, (7691), 1856 states have internal predecessors, (7691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 7691 transitions. [2021-06-05 15:03:49,939 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 7691 transitions. Word has length 28 [2021-06-05 15:03:49,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:49,939 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 7691 transitions. [2021-06-05 15:03:49,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 7691 transitions. [2021-06-05 15:03:49,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:49,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:49,941 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:50,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:50,142 INFO L430 AbstractCegarLoop]: === Iteration 99 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:50,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:50,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1769348101, now seen corresponding path program 23 times [2021-06-05 15:03:50,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:50,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044053968] [2021-06-05 15:03:50,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:50,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:50,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044053968] [2021-06-05 15:03:50,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044053968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:50,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684681330] [2021-06-05 15:03:50,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:50,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:03:50,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:50,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:50,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:50,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684681330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:50,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:50,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 15:03:50,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471327722] [2021-06-05 15:03:50,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:03:50,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:50,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:03:50,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:03:50,258 INFO L87 Difference]: Start difference. First operand 1857 states and 7691 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:50,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:50,477 INFO L93 Difference]: Finished difference Result 3249 states and 12628 transitions. [2021-06-05 15:03:50,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:03:50,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:50,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:50,483 INFO L225 Difference]: With dead ends: 3249 [2021-06-05 15:03:50,483 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 15:03:50,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:03:50,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 15:03:50,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 1852. [2021-06-05 15:03:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 4.13290113452188) internal successors, (7650), 1851 states have internal predecessors, (7650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 7650 transitions. [2021-06-05 15:03:50,515 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 7650 transitions. Word has length 28 [2021-06-05 15:03:50,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:50,515 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 7650 transitions. [2021-06-05 15:03:50,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:50,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 7650 transitions. [2021-06-05 15:03:50,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:50,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:50,518 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:50,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:50,718 INFO L430 AbstractCegarLoop]: === Iteration 100 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:50,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:50,718 INFO L82 PathProgramCache]: Analyzing trace with hash 292393427, now seen corresponding path program 24 times [2021-06-05 15:03:50,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:50,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506597268] [2021-06-05 15:03:50,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:50,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:50,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506597268] [2021-06-05 15:03:50,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506597268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:50,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718991443] [2021-06-05 15:03:50,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:50,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:03:50,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:50,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:50,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:50,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718991443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:50,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:50,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 15:03:50,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468092682] [2021-06-05 15:03:50,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:03:50,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:50,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:03:50,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:03:50,829 INFO L87 Difference]: Start difference. First operand 1852 states and 7650 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:50,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:50,967 INFO L93 Difference]: Finished difference Result 3569 states and 13833 transitions. [2021-06-05 15:03:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:50,967 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:50,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:50,973 INFO L225 Difference]: With dead ends: 3569 [2021-06-05 15:03:50,973 INFO L226 Difference]: Without dead ends: 3317 [2021-06-05 15:03:50,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:03:50,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3317 states. [2021-06-05 15:03:51,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3317 to 2221. [2021-06-05 15:03:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2221 states, 2220 states have (on average 4.201351351351351) internal successors, (9327), 2220 states have internal predecessors, (9327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 9327 transitions. [2021-06-05 15:03:51,011 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 9327 transitions. Word has length 28 [2021-06-05 15:03:51,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:51,011 INFO L482 AbstractCegarLoop]: Abstraction has 2221 states and 9327 transitions. [2021-06-05 15:03:51,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 9327 transitions. [2021-06-05 15:03:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:51,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:51,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:51,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:51,215 INFO L430 AbstractCegarLoop]: === Iteration 101 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:51,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1655877393, now seen corresponding path program 25 times [2021-06-05 15:03:51,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:51,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789172206] [2021-06-05 15:03:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:51,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:51,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789172206] [2021-06-05 15:03:51,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789172206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:51,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94220035] [2021-06-05 15:03:51,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:51,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:51,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:51,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94220035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:51,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:51,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:03:51,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083994466] [2021-06-05 15:03:51,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:03:51,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:51,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:03:51,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:03:51,358 INFO L87 Difference]: Start difference. First operand 2221 states and 9327 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:51,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:51,608 INFO L93 Difference]: Finished difference Result 5363 states and 21241 transitions. [2021-06-05 15:03:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:03:51,608 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:51,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:51,617 INFO L225 Difference]: With dead ends: 5363 [2021-06-05 15:03:51,617 INFO L226 Difference]: Without dead ends: 5161 [2021-06-05 15:03:51,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:03:51,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-06-05 15:03:51,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 2722. [2021-06-05 15:03:51,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 4.300624770305035) internal successors, (11702), 2721 states have internal predecessors, (11702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 11702 transitions. [2021-06-05 15:03:51,700 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 11702 transitions. Word has length 28 [2021-06-05 15:03:51,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:51,700 INFO L482 AbstractCegarLoop]: Abstraction has 2722 states and 11702 transitions. [2021-06-05 15:03:51,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:51,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 11702 transitions. [2021-06-05 15:03:51,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:51,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:51,706 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:51,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 15:03:51,926 INFO L430 AbstractCegarLoop]: === Iteration 102 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:51,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:51,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1838985111, now seen corresponding path program 26 times [2021-06-05 15:03:51,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:51,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666570231] [2021-06-05 15:03:51,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:51,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:51,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666570231] [2021-06-05 15:03:51,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666570231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:51,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095321527] [2021-06-05 15:03:51,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:51,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:51,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:51,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:51,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:52,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095321527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:52,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:52,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 15:03:52,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327538214] [2021-06-05 15:03:52,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:03:52,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:52,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:03:52,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:03:52,044 INFO L87 Difference]: Start difference. First operand 2722 states and 11702 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:52,252 INFO L93 Difference]: Finished difference Result 3984 states and 16212 transitions. [2021-06-05 15:03:52,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:03:52,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:52,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:52,260 INFO L225 Difference]: With dead ends: 3984 [2021-06-05 15:03:52,260 INFO L226 Difference]: Without dead ends: 3895 [2021-06-05 15:03:52,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:52,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3895 states. [2021-06-05 15:03:52,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3895 to 2791. [2021-06-05 15:03:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 4.337992831541219) internal successors, (12103), 2790 states have internal predecessors, (12103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 12103 transitions. [2021-06-05 15:03:52,308 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 12103 transitions. Word has length 28 [2021-06-05 15:03:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:52,308 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 12103 transitions. [2021-06-05 15:03:52,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 12103 transitions. [2021-06-05 15:03:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:52,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:52,312 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:52,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 15:03:52,512 INFO L430 AbstractCegarLoop]: === Iteration 103 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:52,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:52,513 INFO L82 PathProgramCache]: Analyzing trace with hash 931528637, now seen corresponding path program 27 times [2021-06-05 15:03:52,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:52,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567597539] [2021-06-05 15:03:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:52,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:52,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567597539] [2021-06-05 15:03:52,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567597539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:52,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658233904] [2021-06-05 15:03:52,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:52,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:52,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:52,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:52,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:52,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658233904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:52,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:52,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 15:03:52,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926597485] [2021-06-05 15:03:52,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:03:52,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:52,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:03:52,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:03:52,625 INFO L87 Difference]: Start difference. First operand 2791 states and 12103 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:52,792 INFO L93 Difference]: Finished difference Result 5795 states and 23459 transitions. [2021-06-05 15:03:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:52,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:52,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:52,803 INFO L225 Difference]: With dead ends: 5795 [2021-06-05 15:03:52,803 INFO L226 Difference]: Without dead ends: 5676 [2021-06-05 15:03:52,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:52,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-06-05 15:03:52,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 3317. [2021-06-05 15:03:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3317 states, 3316 states have (on average 4.408926417370326) internal successors, (14620), 3316 states have internal predecessors, (14620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 14620 transitions. [2021-06-05 15:03:52,892 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 14620 transitions. Word has length 28 [2021-06-05 15:03:52,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:52,892 INFO L482 AbstractCegarLoop]: Abstraction has 3317 states and 14620 transitions. [2021-06-05 15:03:52,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 14620 transitions. [2021-06-05 15:03:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:52,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:52,897 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:53,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 15:03:53,098 INFO L430 AbstractCegarLoop]: === Iteration 104 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:53,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:53,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2051339415, now seen corresponding path program 28 times [2021-06-05 15:03:53,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:53,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453852540] [2021-06-05 15:03:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:53,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:53,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453852540] [2021-06-05 15:03:53,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453852540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:53,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827420704] [2021-06-05 15:03:53,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:53,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:53,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:53,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:53,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:53,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827420704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:53,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:53,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:03:53,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477252671] [2021-06-05 15:03:53,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:03:53,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:53,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:03:53,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:03:53,231 INFO L87 Difference]: Start difference. First operand 3317 states and 14620 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:53,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:53,463 INFO L93 Difference]: Finished difference Result 5598 states and 22674 transitions. [2021-06-05 15:03:53,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:03:53,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:53,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:53,472 INFO L225 Difference]: With dead ends: 5598 [2021-06-05 15:03:53,472 INFO L226 Difference]: Without dead ends: 5510 [2021-06-05 15:03:53,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:53,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2021-06-05 15:03:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 3445. [2021-06-05 15:03:53,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3444 states have (on average 4.398664343786295) internal successors, (15149), 3444 states have internal predecessors, (15149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 15149 transitions. [2021-06-05 15:03:53,533 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 15149 transitions. Word has length 28 [2021-06-05 15:03:53,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:53,534 INFO L482 AbstractCegarLoop]: Abstraction has 3445 states and 15149 transitions. [2021-06-05 15:03:53,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:53,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 15149 transitions. [2021-06-05 15:03:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:53,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:53,539 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:53,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 15:03:53,739 INFO L430 AbstractCegarLoop]: === Iteration 105 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:53,739 INFO L82 PathProgramCache]: Analyzing trace with hash -11324181, now seen corresponding path program 29 times [2021-06-05 15:03:53,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:53,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3773806] [2021-06-05 15:03:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:53,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:53,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3773806] [2021-06-05 15:03:53,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3773806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:53,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075161678] [2021-06-05 15:03:53,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:53,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:03:53,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:53,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:53,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:53,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075161678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:53,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:53,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:03:53,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253305024] [2021-06-05 15:03:53,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:03:53,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:53,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:03:53,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:03:53,853 INFO L87 Difference]: Start difference. First operand 3445 states and 15149 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:53,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:53,990 INFO L93 Difference]: Finished difference Result 4269 states and 18217 transitions. [2021-06-05 15:03:53,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:03:53,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:53,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:53,999 INFO L225 Difference]: With dead ends: 4269 [2021-06-05 15:03:53,999 INFO L226 Difference]: Without dead ends: 4269 [2021-06-05 15:03:53,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4269 states. [2021-06-05 15:03:54,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4269 to 3397. [2021-06-05 15:03:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3396 states have (on average 4.38545347467609) internal successors, (14893), 3396 states have internal predecessors, (14893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 14893 transitions. [2021-06-05 15:03:54,057 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 14893 transitions. Word has length 28 [2021-06-05 15:03:54,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:54,057 INFO L482 AbstractCegarLoop]: Abstraction has 3397 states and 14893 transitions. [2021-06-05 15:03:54,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:54,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 14893 transitions. [2021-06-05 15:03:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:54,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:54,064 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:54,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:54,277 INFO L430 AbstractCegarLoop]: === Iteration 106 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:54,277 INFO L82 PathProgramCache]: Analyzing trace with hash 956315095, now seen corresponding path program 30 times [2021-06-05 15:03:54,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:54,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182222652] [2021-06-05 15:03:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:54,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:54,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182222652] [2021-06-05 15:03:54,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182222652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:54,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134526591] [2021-06-05 15:03:54,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:54,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:03:54,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:54,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:54,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:54,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134526591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:54,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:54,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:03:54,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711632016] [2021-06-05 15:03:54,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:03:54,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:54,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:03:54,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:03:54,416 INFO L87 Difference]: Start difference. First operand 3397 states and 14893 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:54,681 INFO L93 Difference]: Finished difference Result 5336 states and 21844 transitions. [2021-06-05 15:03:54,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:03:54,681 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:54,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:54,691 INFO L225 Difference]: With dead ends: 5336 [2021-06-05 15:03:54,692 INFO L226 Difference]: Without dead ends: 5222 [2021-06-05 15:03:54,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:54,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5222 states. [2021-06-05 15:03:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5222 to 3511. [2021-06-05 15:03:54,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 3510 states have (on average 4.41965811965812) internal successors, (15513), 3510 states have internal predecessors, (15513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:54,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 15513 transitions. [2021-06-05 15:03:54,760 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 15513 transitions. Word has length 28 [2021-06-05 15:03:54,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:54,760 INFO L482 AbstractCegarLoop]: Abstraction has 3511 states and 15513 transitions. [2021-06-05 15:03:54,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:54,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 15513 transitions. [2021-06-05 15:03:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:54,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:54,766 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:54,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 15:03:54,969 INFO L430 AbstractCegarLoop]: === Iteration 107 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:54,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:54,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1758521383, now seen corresponding path program 31 times [2021-06-05 15:03:54,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:54,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369349309] [2021-06-05 15:03:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:54,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:54,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369349309] [2021-06-05 15:03:54,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369349309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:54,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189493149] [2021-06-05 15:03:54,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:55,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:55,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:55,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189493149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:55,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:55,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:03:55,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216921019] [2021-06-05 15:03:55,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:03:55,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:55,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:03:55,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:03:55,107 INFO L87 Difference]: Start difference. First operand 3511 states and 15513 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:55,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:55,312 INFO L93 Difference]: Finished difference Result 6122 states and 25138 transitions. [2021-06-05 15:03:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:03:55,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:55,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:55,328 INFO L225 Difference]: With dead ends: 6122 [2021-06-05 15:03:55,328 INFO L226 Difference]: Without dead ends: 5828 [2021-06-05 15:03:55,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:55,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2021-06-05 15:03:55,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 3569. [2021-06-05 15:03:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 3568 states have (on average 4.414237668161435) internal successors, (15750), 3568 states have internal predecessors, (15750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 15750 transitions. [2021-06-05 15:03:55,443 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 15750 transitions. Word has length 28 [2021-06-05 15:03:55,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:55,444 INFO L482 AbstractCegarLoop]: Abstraction has 3569 states and 15750 transitions. [2021-06-05 15:03:55,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:55,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 15750 transitions. [2021-06-05 15:03:55,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:55,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:55,452 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:55,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:55,674 INFO L430 AbstractCegarLoop]: === Iteration 108 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:55,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:55,674 INFO L82 PathProgramCache]: Analyzing trace with hash -520222033, now seen corresponding path program 32 times [2021-06-05 15:03:55,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:55,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637867930] [2021-06-05 15:03:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:55,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:55,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637867930] [2021-06-05 15:03:55,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637867930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:55,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60595768] [2021-06-05 15:03:55,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:55,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:55,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:55,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:55,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:55,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60595768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:55,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:55,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:03:55,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171105981] [2021-06-05 15:03:55,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:03:55,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:55,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:03:55,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:03:55,832 INFO L87 Difference]: Start difference. First operand 3569 states and 15750 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:56,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:56,072 INFO L93 Difference]: Finished difference Result 5817 states and 23783 transitions. [2021-06-05 15:03:56,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:03:56,072 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:56,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:56,084 INFO L225 Difference]: With dead ends: 5817 [2021-06-05 15:03:56,084 INFO L226 Difference]: Without dead ends: 5666 [2021-06-05 15:03:56,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:56,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2021-06-05 15:03:56,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 3449. [2021-06-05 15:03:56,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3448 states have (on average 4.444605568445476) internal successors, (15325), 3448 states have internal predecessors, (15325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 15325 transitions. [2021-06-05 15:03:56,169 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 15325 transitions. Word has length 28 [2021-06-05 15:03:56,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:56,169 INFO L482 AbstractCegarLoop]: Abstraction has 3449 states and 15325 transitions. [2021-06-05 15:03:56,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 15325 transitions. [2021-06-05 15:03:56,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:56,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:56,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:56,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:56,375 INFO L430 AbstractCegarLoop]: === Iteration 109 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:56,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:56,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1821034983, now seen corresponding path program 33 times [2021-06-05 15:03:56,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:56,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13024394] [2021-06-05 15:03:56,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:56,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:56,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13024394] [2021-06-05 15:03:56,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13024394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:56,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745518126] [2021-06-05 15:03:56,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:56,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:56,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:56,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:56,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:56,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745518126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:56,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:56,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 15:03:56,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289746293] [2021-06-05 15:03:56,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:03:56,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:56,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:03:56,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:03:56,483 INFO L87 Difference]: Start difference. First operand 3449 states and 15325 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:56,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:56,604 INFO L93 Difference]: Finished difference Result 4110 states and 17975 transitions. [2021-06-05 15:03:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:03:56,604 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:56,613 INFO L225 Difference]: With dead ends: 4110 [2021-06-05 15:03:56,613 INFO L226 Difference]: Without dead ends: 4067 [2021-06-05 15:03:56,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:56,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4067 states. [2021-06-05 15:03:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4067 to 3438. [2021-06-05 15:03:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 4.451556590049462) internal successors, (15300), 3437 states have internal predecessors, (15300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 15300 transitions. [2021-06-05 15:03:56,668 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 15300 transitions. Word has length 28 [2021-06-05 15:03:56,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:56,668 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 15300 transitions. [2021-06-05 15:03:56,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:56,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 15300 transitions. [2021-06-05 15:03:56,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:56,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:56,674 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:56,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:56,875 INFO L430 AbstractCegarLoop]: === Iteration 110 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:56,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1143597769, now seen corresponding path program 34 times [2021-06-05 15:03:56,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:56,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074997276] [2021-06-05 15:03:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:56,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:56,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074997276] [2021-06-05 15:03:56,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074997276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:56,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64934250] [2021-06-05 15:03:56,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:56,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:56,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:56,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:56,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:56,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64934250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:56,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:56,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 15:03:56,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124282478] [2021-06-05 15:03:56,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:03:56,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:56,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:03:56,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:03:56,981 INFO L87 Difference]: Start difference. First operand 3438 states and 15300 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:57,102 INFO L93 Difference]: Finished difference Result 4436 states and 19277 transitions. [2021-06-05 15:03:57,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:03:57,103 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:57,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:57,111 INFO L225 Difference]: With dead ends: 4436 [2021-06-05 15:03:57,112 INFO L226 Difference]: Without dead ends: 4436 [2021-06-05 15:03:57,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:57,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-05 15:03:57,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3438. [2021-06-05 15:03:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 4.442828047716032) internal successors, (15270), 3437 states have internal predecessors, (15270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 15270 transitions. [2021-06-05 15:03:57,168 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 15270 transitions. Word has length 28 [2021-06-05 15:03:57,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:57,168 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 15270 transitions. [2021-06-05 15:03:57,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 15270 transitions. [2021-06-05 15:03:57,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:57,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:57,176 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:57,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:57,393 INFO L430 AbstractCegarLoop]: === Iteration 111 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:57,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1856145151, now seen corresponding path program 35 times [2021-06-05 15:03:57,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:57,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342308451] [2021-06-05 15:03:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:57,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:57,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342308451] [2021-06-05 15:03:57,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342308451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:57,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988469829] [2021-06-05 15:03:57,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:57,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:03:57,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:57,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:57,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:57,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988469829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:57,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:57,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:03:57,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822914417] [2021-06-05 15:03:57,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:03:57,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:57,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:03:57,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:03:57,511 INFO L87 Difference]: Start difference. First operand 3438 states and 15270 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:57,774 INFO L93 Difference]: Finished difference Result 5603 states and 22995 transitions. [2021-06-05 15:03:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:03:57,774 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:57,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:57,785 INFO L225 Difference]: With dead ends: 5603 [2021-06-05 15:03:57,785 INFO L226 Difference]: Without dead ends: 5426 [2021-06-05 15:03:57,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:03:57,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-05 15:03:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 3523. [2021-06-05 15:03:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3523 states, 3522 states have (on average 4.458262350936968) internal successors, (15702), 3522 states have internal predecessors, (15702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3523 states to 3523 states and 15702 transitions. [2021-06-05 15:03:57,857 INFO L78 Accepts]: Start accepts. Automaton has 3523 states and 15702 transitions. Word has length 28 [2021-06-05 15:03:57,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:57,857 INFO L482 AbstractCegarLoop]: Abstraction has 3523 states and 15702 transitions. [2021-06-05 15:03:57,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3523 states and 15702 transitions. [2021-06-05 15:03:57,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:57,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:57,863 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:58,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:58,065 INFO L430 AbstractCegarLoop]: === Iteration 112 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:58,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:58,065 INFO L82 PathProgramCache]: Analyzing trace with hash -398806911, now seen corresponding path program 36 times [2021-06-05 15:03:58,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:58,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339124128] [2021-06-05 15:03:58,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:58,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:58,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339124128] [2021-06-05 15:03:58,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339124128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:58,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494189936] [2021-06-05 15:03:58,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:58,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:03:58,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:58,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:58,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:58,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494189936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:58,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:58,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:03:58,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279172949] [2021-06-05 15:03:58,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:03:58,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:58,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:03:58,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:03:58,186 INFO L87 Difference]: Start difference. First operand 3523 states and 15702 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:58,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:58,384 INFO L93 Difference]: Finished difference Result 5173 states and 21715 transitions. [2021-06-05 15:03:58,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:03:58,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:58,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:58,395 INFO L225 Difference]: With dead ends: 5173 [2021-06-05 15:03:58,395 INFO L226 Difference]: Without dead ends: 4874 [2021-06-05 15:03:58,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2021-06-05 15:03:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 3688. [2021-06-05 15:03:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 4.490100352590182) internal successors, (16555), 3687 states have internal predecessors, (16555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 16555 transitions. [2021-06-05 15:03:58,501 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 16555 transitions. Word has length 28 [2021-06-05 15:03:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:58,501 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 16555 transitions. [2021-06-05 15:03:58,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 16555 transitions. [2021-06-05 15:03:58,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:58,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:58,508 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:58,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:58,709 INFO L430 AbstractCegarLoop]: === Iteration 113 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:58,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:58,709 INFO L82 PathProgramCache]: Analyzing trace with hash 87221655, now seen corresponding path program 37 times [2021-06-05 15:03:58,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:58,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351867369] [2021-06-05 15:03:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:58,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:58,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351867369] [2021-06-05 15:03:58,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351867369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:58,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041234510] [2021-06-05 15:03:58,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:58,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:58,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:58,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041234510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:58,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:58,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 15:03:58,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719537842] [2021-06-05 15:03:58,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:03:58,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:58,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:03:58,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:03:58,848 INFO L87 Difference]: Start difference. First operand 3688 states and 16555 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:59,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:59,067 INFO L93 Difference]: Finished difference Result 4799 states and 20479 transitions. [2021-06-05 15:03:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:03:59,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:59,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:59,077 INFO L225 Difference]: With dead ends: 4799 [2021-06-05 15:03:59,077 INFO L226 Difference]: Without dead ends: 4701 [2021-06-05 15:03:59,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:59,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2021-06-05 15:03:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 3505. [2021-06-05 15:03:59,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3505 states, 3504 states have (on average 4.476027397260274) internal successors, (15684), 3504 states have internal predecessors, (15684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:59,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3505 states to 3505 states and 15684 transitions. [2021-06-05 15:03:59,140 INFO L78 Accepts]: Start accepts. Automaton has 3505 states and 15684 transitions. Word has length 28 [2021-06-05 15:03:59,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:59,140 INFO L482 AbstractCegarLoop]: Abstraction has 3505 states and 15684 transitions. [2021-06-05 15:03:59,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:59,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3505 states and 15684 transitions. [2021-06-05 15:03:59,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:59,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:59,146 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:59,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 15:03:59,348 INFO L430 AbstractCegarLoop]: === Iteration 114 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:59,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:59,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2146004113, now seen corresponding path program 38 times [2021-06-05 15:03:59,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:59,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655326280] [2021-06-05 15:03:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:59,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:59,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655326280] [2021-06-05 15:03:59,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655326280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:59,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792548243] [2021-06-05 15:03:59,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:59,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:59,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:59,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:59,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:59,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792548243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:59,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:59,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 15:03:59,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838184347] [2021-06-05 15:03:59,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:03:59,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:59,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:03:59,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:03:59,458 INFO L87 Difference]: Start difference. First operand 3505 states and 15684 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:59,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:59,625 INFO L93 Difference]: Finished difference Result 6407 states and 26477 transitions. [2021-06-05 15:03:59,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:59,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:03:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:59,639 INFO L225 Difference]: With dead ends: 6407 [2021-06-05 15:03:59,639 INFO L226 Difference]: Without dead ends: 6155 [2021-06-05 15:03:59,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6155 states. [2021-06-05 15:03:59,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6155 to 3796. [2021-06-05 15:03:59,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.4574440052700925) internal successors, (16916), 3795 states have internal predecessors, (16916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 16916 transitions. [2021-06-05 15:03:59,724 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 16916 transitions. Word has length 28 [2021-06-05 15:03:59,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:59,724 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 16916 transitions. [2021-06-05 15:03:59,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 16916 transitions. [2021-06-05 15:03:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:03:59,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:59,730 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:59,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 15:03:59,931 INFO L430 AbstractCegarLoop]: === Iteration 115 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:59,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:59,931 INFO L82 PathProgramCache]: Analyzing trace with hash 200692363, now seen corresponding path program 39 times [2021-06-05 15:03:59,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:59,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274587717] [2021-06-05 15:03:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:59,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:59,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274587717] [2021-06-05 15:03:59,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274587717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:59,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206894084] [2021-06-05 15:03:59,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:59,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:59,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:59,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:03:59,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:00,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206894084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:00,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:00,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:04:00,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220026849] [2021-06-05 15:04:00,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:04:00,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:00,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:04:00,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:04:00,092 INFO L87 Difference]: Start difference. First operand 3796 states and 16916 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:00,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:00,333 INFO L93 Difference]: Finished difference Result 6642 states and 28034 transitions. [2021-06-05 15:04:00,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:04:00,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:04:00,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:00,346 INFO L225 Difference]: With dead ends: 6642 [2021-06-05 15:04:00,346 INFO L226 Difference]: Without dead ends: 6448 [2021-06-05 15:04:00,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:00,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6448 states. [2021-06-05 15:04:00,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6448 to 4066. [2021-06-05 15:04:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4066 states, 4065 states have (on average 4.525707257072571) internal successors, (18397), 4065 states have internal predecessors, (18397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4066 states to 4066 states and 18397 transitions. [2021-06-05 15:04:00,422 INFO L78 Accepts]: Start accepts. Automaton has 4066 states and 18397 transitions. Word has length 28 [2021-06-05 15:04:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:00,422 INFO L482 AbstractCegarLoop]: Abstraction has 4066 states and 18397 transitions. [2021-06-05 15:04:00,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4066 states and 18397 transitions. [2021-06-05 15:04:00,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:04:00,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:00,428 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:00,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 15:04:00,629 INFO L430 AbstractCegarLoop]: === Iteration 116 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash 17584645, now seen corresponding path program 40 times [2021-06-05 15:04:00,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:00,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924320716] [2021-06-05 15:04:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:00,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:00,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924320716] [2021-06-05 15:04:00,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924320716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:00,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80629341] [2021-06-05 15:04:00,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:00,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:00,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:00,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:00,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:00,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80629341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:00,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:00,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 15:04:00,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971756287] [2021-06-05 15:04:00,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:00,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:00,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:00,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:00,749 INFO L87 Difference]: Start difference. First operand 4066 states and 18397 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:00,957 INFO L93 Difference]: Finished difference Result 5715 states and 24180 transitions. [2021-06-05 15:04:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:04:00,958 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:04:00,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:00,968 INFO L225 Difference]: With dead ends: 5715 [2021-06-05 15:04:00,968 INFO L226 Difference]: Without dead ends: 5626 [2021-06-05 15:04:00,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:04:00,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2021-06-05 15:04:01,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 3989. [2021-06-05 15:04:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3989 states, 3988 states have (on average 4.533600802407221) internal successors, (18080), 3988 states have internal predecessors, (18080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3989 states to 3989 states and 18080 transitions. [2021-06-05 15:04:01,041 INFO L78 Accepts]: Start accepts. Automaton has 3989 states and 18080 transitions. Word has length 28 [2021-06-05 15:04:01,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:01,041 INFO L482 AbstractCegarLoop]: Abstraction has 3989 states and 18080 transitions. [2021-06-05 15:04:01,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,041 INFO L276 IsEmpty]: Start isEmpty. Operand 3989 states and 18080 transitions. [2021-06-05 15:04:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:04:01,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:01,047 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:01,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:01,248 INFO L430 AbstractCegarLoop]: === Iteration 117 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:01,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1506868903, now seen corresponding path program 41 times [2021-06-05 15:04:01,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:01,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664762626] [2021-06-05 15:04:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:01,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:01,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664762626] [2021-06-05 15:04:01,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664762626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:01,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133416904] [2021-06-05 15:04:01,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:01,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:01,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:01,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:01,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:01,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133416904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:01,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:01,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 15:04:01,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574036966] [2021-06-05 15:04:01,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:01,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:01,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:01,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:01,356 INFO L87 Difference]: Start difference. First operand 3989 states and 18080 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:01,549 INFO L93 Difference]: Finished difference Result 6786 states and 28942 transitions. [2021-06-05 15:04:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:04:01,549 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:04:01,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:01,563 INFO L225 Difference]: With dead ends: 6786 [2021-06-05 15:04:01,563 INFO L226 Difference]: Without dead ends: 6667 [2021-06-05 15:04:01,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:04:01,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2021-06-05 15:04:01,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 3772. [2021-06-05 15:04:01,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3772 states, 3771 states have (on average 4.483426146910634) internal successors, (16907), 3771 states have internal predecessors, (16907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3772 states to 3772 states and 16907 transitions. [2021-06-05 15:04:01,636 INFO L78 Accepts]: Start accepts. Automaton has 3772 states and 16907 transitions. Word has length 28 [2021-06-05 15:04:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:01,636 INFO L482 AbstractCegarLoop]: Abstraction has 3772 states and 16907 transitions. [2021-06-05 15:04:01,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3772 states and 16907 transitions. [2021-06-05 15:04:01,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:04:01,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:01,642 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:01,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:01,844 INFO L430 AbstractCegarLoop]: === Iteration 118 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:01,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:01,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1298098363, now seen corresponding path program 42 times [2021-06-05 15:04:01,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:01,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640364147] [2021-06-05 15:04:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:01,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:01,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640364147] [2021-06-05 15:04:01,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640364147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:01,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734960584] [2021-06-05 15:04:01,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:01,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:01,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:01,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:01,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:01,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734960584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:01,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:01,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 15:04:01,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831498975] [2021-06-05 15:04:01,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:04:01,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:01,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:04:01,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:04:01,950 INFO L87 Difference]: Start difference. First operand 3772 states and 16907 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:02,083 INFO L93 Difference]: Finished difference Result 4650 states and 20206 transitions. [2021-06-05 15:04:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:04:02,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:04:02,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:02,092 INFO L225 Difference]: With dead ends: 4650 [2021-06-05 15:04:02,092 INFO L226 Difference]: Without dead ends: 4486 [2021-06-05 15:04:02,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:02,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-05 15:04:02,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3725. [2021-06-05 15:04:02,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 4.506176154672395) internal successors, (16781), 3724 states have internal predecessors, (16781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 16781 transitions. [2021-06-05 15:04:02,149 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 16781 transitions. Word has length 28 [2021-06-05 15:04:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:02,149 INFO L482 AbstractCegarLoop]: Abstraction has 3725 states and 16781 transitions. [2021-06-05 15:04:02,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 16781 transitions. [2021-06-05 15:04:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:04:02,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:02,155 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:02,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:02,366 INFO L430 AbstractCegarLoop]: === Iteration 119 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:02,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:02,367 INFO L82 PathProgramCache]: Analyzing trace with hash 571732251, now seen corresponding path program 43 times [2021-06-05 15:04:02,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:02,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999588056] [2021-06-05 15:04:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:02,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:02,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999588056] [2021-06-05 15:04:02,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999588056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:02,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847388518] [2021-06-05 15:04:02,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:02,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:02,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:02,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847388518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:02,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:02,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 15:04:02,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965760729] [2021-06-05 15:04:02,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:04:02,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:02,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:04:02,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:04:02,468 INFO L87 Difference]: Start difference. First operand 3725 states and 16781 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:02,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:02,569 INFO L93 Difference]: Finished difference Result 4894 states and 21444 transitions. [2021-06-05 15:04:02,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:04:02,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:04:02,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:02,579 INFO L225 Difference]: With dead ends: 4894 [2021-06-05 15:04:02,579 INFO L226 Difference]: Without dead ends: 4894 [2021-06-05 15:04:02,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:02,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4894 states. [2021-06-05 15:04:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4894 to 3755. [2021-06-05 15:04:02,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 4.508790623335109) internal successors, (16926), 3754 states have internal predecessors, (16926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 16926 transitions. [2021-06-05 15:04:02,638 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 16926 transitions. Word has length 28 [2021-06-05 15:04:02,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:02,638 INFO L482 AbstractCegarLoop]: Abstraction has 3755 states and 16926 transitions. [2021-06-05 15:04:02,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 16926 transitions. [2021-06-05 15:04:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:04:02,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:02,644 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:02,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:02,845 INFO L430 AbstractCegarLoop]: === Iteration 120 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:02,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:02,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1136343519, now seen corresponding path program 44 times [2021-06-05 15:04:02,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:02,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68695249] [2021-06-05 15:04:02,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:02,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:02,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68695249] [2021-06-05 15:04:02,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68695249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:02,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747885280] [2021-06-05 15:04:02,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:02,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:02,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:02,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:02,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:02,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747885280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:02,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:02,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:02,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887138042] [2021-06-05 15:04:02,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:02,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:02,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:02,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:02,950 INFO L87 Difference]: Start difference. First operand 3755 states and 16926 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:03,177 INFO L93 Difference]: Finished difference Result 5651 states and 23907 transitions. [2021-06-05 15:04:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:04:03,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:04:03,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:03,187 INFO L225 Difference]: With dead ends: 5651 [2021-06-05 15:04:03,187 INFO L226 Difference]: Without dead ends: 5528 [2021-06-05 15:04:03,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:03,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5528 states. [2021-06-05 15:04:03,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5528 to 3782. [2021-06-05 15:04:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3782 states, 3781 states have (on average 4.539539804284581) internal successors, (17164), 3781 states have internal predecessors, (17164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3782 states to 3782 states and 17164 transitions. [2021-06-05 15:04:03,252 INFO L78 Accepts]: Start accepts. Automaton has 3782 states and 17164 transitions. Word has length 28 [2021-06-05 15:04:03,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:03,252 INFO L482 AbstractCegarLoop]: Abstraction has 3782 states and 17164 transitions. [2021-06-05 15:04:03,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3782 states and 17164 transitions. [2021-06-05 15:04:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:04:03,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:03,258 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:03,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:03,459 INFO L430 AbstractCegarLoop]: === Iteration 121 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:03,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:03,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1410972353, now seen corresponding path program 45 times [2021-06-05 15:04:03,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:03,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375593642] [2021-06-05 15:04:03,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:03,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:03,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375593642] [2021-06-05 15:04:03,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375593642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:03,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498631296] [2021-06-05 15:04:03,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:03,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:03,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:03,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:03,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:03,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498631296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:03,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:03,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:03,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108537149] [2021-06-05 15:04:03,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:03,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:03,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:03,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:03,571 INFO L87 Difference]: Start difference. First operand 3782 states and 17164 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:03,730 INFO L93 Difference]: Finished difference Result 4632 states and 20315 transitions. [2021-06-05 15:04:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:04:03,730 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:04:03,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:03,739 INFO L225 Difference]: With dead ends: 4632 [2021-06-05 15:04:03,740 INFO L226 Difference]: Without dead ends: 4632 [2021-06-05 15:04:03,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4632 states. [2021-06-05 15:04:03,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 3902. [2021-06-05 15:04:03,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3902 states, 3901 states have (on average 4.535247372468598) internal successors, (17692), 3901 states have internal predecessors, (17692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3902 states to 3902 states and 17692 transitions. [2021-06-05 15:04:03,801 INFO L78 Accepts]: Start accepts. Automaton has 3902 states and 17692 transitions. Word has length 28 [2021-06-05 15:04:03,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:03,801 INFO L482 AbstractCegarLoop]: Abstraction has 3902 states and 17692 transitions. [2021-06-05 15:04:03,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3902 states and 17692 transitions. [2021-06-05 15:04:03,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:04:03,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:03,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:04,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-05 15:04:04,009 INFO L430 AbstractCegarLoop]: === Iteration 122 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:04,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:04,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1216055663, now seen corresponding path program 46 times [2021-06-05 15:04:04,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:04,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580559564] [2021-06-05 15:04:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:04,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:04,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580559564] [2021-06-05 15:04:04,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580559564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:04,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978856590] [2021-06-05 15:04:04,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:04,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:04,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:04,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:04,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:04,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978856590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:04,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:04,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:04,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293349082] [2021-06-05 15:04:04,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:04,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:04,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:04,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:04,132 INFO L87 Difference]: Start difference. First operand 3902 states and 17692 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:04,355 INFO L93 Difference]: Finished difference Result 7832 states and 33399 transitions. [2021-06-05 15:04:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:04:04,356 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:04:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:04,373 INFO L225 Difference]: With dead ends: 7832 [2021-06-05 15:04:04,373 INFO L226 Difference]: Without dead ends: 7734 [2021-06-05 15:04:04,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7734 states. [2021-06-05 15:04:04,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7734 to 4483. [2021-06-05 15:04:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4483 states, 4482 states have (on average 4.557340473003124) internal successors, (20426), 4482 states have internal predecessors, (20426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4483 states to 4483 states and 20426 transitions. [2021-06-05 15:04:04,523 INFO L78 Accepts]: Start accepts. Automaton has 4483 states and 20426 transitions. Word has length 28 [2021-06-05 15:04:04,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:04,523 INFO L482 AbstractCegarLoop]: Abstraction has 4483 states and 20426 transitions. [2021-06-05 15:04:04,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 4483 states and 20426 transitions. [2021-06-05 15:04:04,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:04:04,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:04,532 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:04,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:04,732 INFO L430 AbstractCegarLoop]: === Iteration 123 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:04,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:04,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1753521871, now seen corresponding path program 47 times [2021-06-05 15:04:04,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:04,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961771559] [2021-06-05 15:04:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:04,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:04,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961771559] [2021-06-05 15:04:04,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961771559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:04,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469327118] [2021-06-05 15:04:04,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:04,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:04,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:04,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:04,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:04,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469327118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:04,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:04,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:04,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499655176] [2021-06-05 15:04:04,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:04,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:04,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:04,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:04,870 INFO L87 Difference]: Start difference. First operand 4483 states and 20426 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:05,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:05,045 INFO L93 Difference]: Finished difference Result 6775 states and 28653 transitions. [2021-06-05 15:04:05,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:04:05,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:04:05,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:05,061 INFO L225 Difference]: With dead ends: 6775 [2021-06-05 15:04:05,062 INFO L226 Difference]: Without dead ends: 6523 [2021-06-05 15:04:05,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:05,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6523 states. [2021-06-05 15:04:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6523 to 4878. [2021-06-05 15:04:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4878 states, 4877 states have (on average 4.533729751896658) internal successors, (22111), 4877 states have internal predecessors, (22111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:05,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4878 states to 4878 states and 22111 transitions. [2021-06-05 15:04:05,165 INFO L78 Accepts]: Start accepts. Automaton has 4878 states and 22111 transitions. Word has length 28 [2021-06-05 15:04:05,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:05,165 INFO L482 AbstractCegarLoop]: Abstraction has 4878 states and 22111 transitions. [2021-06-05 15:04:05,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:05,165 INFO L276 IsEmpty]: Start isEmpty. Operand 4878 states and 22111 transitions. [2021-06-05 15:04:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:04:05,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:05,173 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:05,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 15:04:05,374 INFO L430 AbstractCegarLoop]: === Iteration 124 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:05,374 INFO L82 PathProgramCache]: Analyzing trace with hash 629820639, now seen corresponding path program 48 times [2021-06-05 15:04:05,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:05,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104964724] [2021-06-05 15:04:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:05,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:05,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104964724] [2021-06-05 15:04:05,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104964724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:05,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723618634] [2021-06-05 15:04:05,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:05,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:04:05,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:05,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:05,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:05,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723618634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:05,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:05,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:05,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077470183] [2021-06-05 15:04:05,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:05,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:05,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:05,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:05,492 INFO L87 Difference]: Start difference. First operand 4878 states and 22111 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:05,737 INFO L93 Difference]: Finished difference Result 5978 states and 25883 transitions. [2021-06-05 15:04:05,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:04:05,737 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:04:05,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:05,750 INFO L225 Difference]: With dead ends: 5978 [2021-06-05 15:04:05,750 INFO L226 Difference]: Without dead ends: 5889 [2021-06-05 15:04:05,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:04:05,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5889 states. [2021-06-05 15:04:05,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5889 to 4685. [2021-06-05 15:04:05,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 4684 states have (on average 4.536720751494449) internal successors, (21250), 4684 states have internal predecessors, (21250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 21250 transitions. [2021-06-05 15:04:05,834 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 21250 transitions. Word has length 28 [2021-06-05 15:04:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:05,834 INFO L482 AbstractCegarLoop]: Abstraction has 4685 states and 21250 transitions. [2021-06-05 15:04:05,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 21250 transitions. [2021-06-05 15:04:05,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:04:05,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:05,842 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:06,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:06,042 INFO L430 AbstractCegarLoop]: === Iteration 125 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:06,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:06,043 INFO L82 PathProgramCache]: Analyzing trace with hash -894632909, now seen corresponding path program 49 times [2021-06-05 15:04:06,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:06,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343192367] [2021-06-05 15:04:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:06,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:06,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343192367] [2021-06-05 15:04:06,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343192367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:06,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020663993] [2021-06-05 15:04:06,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:06,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:06,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:06,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020663993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:06,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:06,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:06,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609371831] [2021-06-05 15:04:06,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:06,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:06,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:06,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:06,162 INFO L87 Difference]: Start difference. First operand 4685 states and 21250 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:06,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:06,335 INFO L93 Difference]: Finished difference Result 7586 states and 32323 transitions. [2021-06-05 15:04:06,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:04:06,336 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:04:06,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:06,352 INFO L225 Difference]: With dead ends: 7586 [2021-06-05 15:04:06,352 INFO L226 Difference]: Without dead ends: 7449 [2021-06-05 15:04:06,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7449 states. [2021-06-05 15:04:06,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7449 to 4472. [2021-06-05 15:04:06,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4472 states, 4471 states have (on average 4.534779691344219) internal successors, (20275), 4471 states have internal predecessors, (20275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 20275 transitions. [2021-06-05 15:04:06,484 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 20275 transitions. Word has length 28 [2021-06-05 15:04:06,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:06,484 INFO L482 AbstractCegarLoop]: Abstraction has 4472 states and 20275 transitions. [2021-06-05 15:04:06,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:06,484 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 20275 transitions. [2021-06-05 15:04:06,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:06,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:06,491 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:06,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 15:04:06,692 INFO L430 AbstractCegarLoop]: === Iteration 126 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:06,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:06,692 INFO L82 PathProgramCache]: Analyzing trace with hash -2020102972, now seen corresponding path program 50 times [2021-06-05 15:04:06,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:06,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447159358] [2021-06-05 15:04:06,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:06,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:06,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447159358] [2021-06-05 15:04:06,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447159358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:06,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409263168] [2021-06-05 15:04:06,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:06,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:06,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:06,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:04:06,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:07,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:07,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:07,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:07,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:07,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:04:07,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:07,252 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-05 15:04:07,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:07,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-05 15:04:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:07,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409263168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:07,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:07,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-05 15:04:07,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060598029] [2021-06-05 15:04:07,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:04:07,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:07,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:04:07,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:04:07,314 INFO L87 Difference]: Start difference. First operand 4472 states and 20275 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:08,920 INFO L93 Difference]: Finished difference Result 5694 states and 24665 transitions. [2021-06-05 15:04:08,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:04:08,921 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:08,933 INFO L225 Difference]: With dead ends: 5694 [2021-06-05 15:04:08,933 INFO L226 Difference]: Without dead ends: 5532 [2021-06-05 15:04:08,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 863.0ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:04:08,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2021-06-05 15:04:09,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 4549. [2021-06-05 15:04:09,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4549 states, 4548 states have (on average 4.516051011433597) internal successors, (20539), 4548 states have internal predecessors, (20539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:09,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4549 states to 4549 states and 20539 transitions. [2021-06-05 15:04:09,020 INFO L78 Accepts]: Start accepts. Automaton has 4549 states and 20539 transitions. Word has length 30 [2021-06-05 15:04:09,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:09,021 INFO L482 AbstractCegarLoop]: Abstraction has 4549 states and 20539 transitions. [2021-06-05 15:04:09,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:09,021 INFO L276 IsEmpty]: Start isEmpty. Operand 4549 states and 20539 transitions. [2021-06-05 15:04:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:09,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:09,029 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:09,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:09,250 INFO L430 AbstractCegarLoop]: === Iteration 127 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:09,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:09,250 INFO L82 PathProgramCache]: Analyzing trace with hash -334675676, now seen corresponding path program 1 times [2021-06-05 15:04:09,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:09,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347572932] [2021-06-05 15:04:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:09,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:09,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347572932] [2021-06-05 15:04:09,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347572932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:09,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870444789] [2021-06-05 15:04:09,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:09,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:09,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:09,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:09,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:09,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:09,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:04:09,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:09,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:09,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:09,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 15:04:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:09,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870444789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:09,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:09,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 15:04:09,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357758594] [2021-06-05 15:04:09,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:09,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:09,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:09,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:09,813 INFO L87 Difference]: Start difference. First operand 4549 states and 20539 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:10,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:10,886 INFO L93 Difference]: Finished difference Result 5260 states and 23354 transitions. [2021-06-05 15:04:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:04:10,887 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:10,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:10,898 INFO L225 Difference]: With dead ends: 5260 [2021-06-05 15:04:10,898 INFO L226 Difference]: Without dead ends: 5187 [2021-06-05 15:04:10,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 646.7ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:04:10,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5187 states. [2021-06-05 15:04:10,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5187 to 4573. [2021-06-05 15:04:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4573 states, 4572 states have (on average 4.5150918635170605) internal successors, (20643), 4572 states have internal predecessors, (20643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4573 states to 4573 states and 20643 transitions. [2021-06-05 15:04:10,977 INFO L78 Accepts]: Start accepts. Automaton has 4573 states and 20643 transitions. Word has length 30 [2021-06-05 15:04:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:10,977 INFO L482 AbstractCegarLoop]: Abstraction has 4573 states and 20643 transitions. [2021-06-05 15:04:10,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:10,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4573 states and 20643 transitions. [2021-06-05 15:04:10,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:10,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:10,985 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:11,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:11,189 INFO L430 AbstractCegarLoop]: === Iteration 128 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:11,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:11,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1057468870, now seen corresponding path program 2 times [2021-06-05 15:04:11,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:11,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297413001] [2021-06-05 15:04:11,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:11,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:11,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297413001] [2021-06-05 15:04:11,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297413001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:11,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515133018] [2021-06-05 15:04:11,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:11,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:11,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:11,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:04:11,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:11,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:11,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:11,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:11,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:04:11,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:11,735 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-05 15:04:11,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:11,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:14 [2021-06-05 15:04:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:11,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515133018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:11,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:11,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-05 15:04:11,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521673054] [2021-06-05 15:04:11,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:04:11,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:11,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:04:11,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:04:11,817 INFO L87 Difference]: Start difference. First operand 4573 states and 20643 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:12,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:12,859 INFO L93 Difference]: Finished difference Result 4953 states and 22062 transitions. [2021-06-05 15:04:12,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:04:12,860 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:12,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:12,870 INFO L225 Difference]: With dead ends: 4953 [2021-06-05 15:04:12,871 INFO L226 Difference]: Without dead ends: 4872 [2021-06-05 15:04:12,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 722.6ms TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:04:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2021-06-05 15:04:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 4581. [2021-06-05 15:04:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 4.513100436681222) internal successors, (20670), 4580 states have internal predecessors, (20670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 20670 transitions. [2021-06-05 15:04:12,987 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 20670 transitions. Word has length 30 [2021-06-05 15:04:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:12,987 INFO L482 AbstractCegarLoop]: Abstraction has 4581 states and 20670 transitions. [2021-06-05 15:04:12,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:12,987 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 20670 transitions. [2021-06-05 15:04:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:12,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:12,995 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:13,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 15:04:13,197 INFO L430 AbstractCegarLoop]: === Iteration 129 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:13,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:13,197 INFO L82 PathProgramCache]: Analyzing trace with hash 551122604, now seen corresponding path program 3 times [2021-06-05 15:04:13,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:13,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187724764] [2021-06-05 15:04:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:13,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:13,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187724764] [2021-06-05 15:04:13,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187724764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:13,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170508383] [2021-06-05 15:04:13,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:13,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:13,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:13,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:13,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:13,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:13,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:13,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:13,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:04:13,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:13,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:13,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:13,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 15:04:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:13,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170508383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:13,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:13,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 15:04:13,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180501943] [2021-06-05 15:04:13,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:13,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:13,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:13,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:13,742 INFO L87 Difference]: Start difference. First operand 4581 states and 20670 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:14,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:14,736 INFO L93 Difference]: Finished difference Result 5288 states and 23473 transitions. [2021-06-05 15:04:14,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:04:14,737 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:14,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:14,748 INFO L225 Difference]: With dead ends: 5288 [2021-06-05 15:04:14,748 INFO L226 Difference]: Without dead ends: 5215 [2021-06-05 15:04:14,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 647.4ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:04:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5215 states. [2021-06-05 15:04:14,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5215 to 4583. [2021-06-05 15:04:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4582 states have (on average 4.513531209079005) internal successors, (20681), 4582 states have internal predecessors, (20681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 20681 transitions. [2021-06-05 15:04:14,826 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 20681 transitions. Word has length 30 [2021-06-05 15:04:14,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:14,826 INFO L482 AbstractCegarLoop]: Abstraction has 4583 states and 20681 transitions. [2021-06-05 15:04:14,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:14,826 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 20681 transitions. [2021-06-05 15:04:14,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:14,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:14,834 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:15,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:15,034 INFO L430 AbstractCegarLoop]: === Iteration 130 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:15,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:15,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1527142108, now seen corresponding path program 4 times [2021-06-05 15:04:15,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:15,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890976632] [2021-06-05 15:04:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:15,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:15,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890976632] [2021-06-05 15:04:15,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890976632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:15,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505958746] [2021-06-05 15:04:15,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:15,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:15,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:15,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:15,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:15,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:15,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:15,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:15,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:15,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:04:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:15,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505958746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:15,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:15,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:04:15,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004492889] [2021-06-05 15:04:15,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:15,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:15,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:15,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:15,439 INFO L87 Difference]: Start difference. First operand 4583 states and 20681 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:16,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:16,622 INFO L93 Difference]: Finished difference Result 6197 states and 27339 transitions. [2021-06-05 15:04:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:04:16,622 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:16,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:16,636 INFO L225 Difference]: With dead ends: 6197 [2021-06-05 15:04:16,636 INFO L226 Difference]: Without dead ends: 6116 [2021-06-05 15:04:16,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 772.1ms TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:04:16,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2021-06-05 15:04:16,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 4656. [2021-06-05 15:04:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4656 states, 4655 states have (on average 4.501825993555316) internal successors, (20956), 4655 states have internal predecessors, (20956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4656 states to 4656 states and 20956 transitions. [2021-06-05 15:04:16,720 INFO L78 Accepts]: Start accepts. Automaton has 4656 states and 20956 transitions. Word has length 30 [2021-06-05 15:04:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:16,720 INFO L482 AbstractCegarLoop]: Abstraction has 4656 states and 20956 transitions. [2021-06-05 15:04:16,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 4656 states and 20956 transitions. [2021-06-05 15:04:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:16,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:16,727 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:16,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:16,928 INFO L430 AbstractCegarLoop]: === Iteration 131 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:16,928 INFO L82 PathProgramCache]: Analyzing trace with hash 158285188, now seen corresponding path program 21 times [2021-06-05 15:04:16,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:16,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45917840] [2021-06-05 15:04:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:17,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:17,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45917840] [2021-06-05 15:04:17,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45917840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:17,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389247752] [2021-06-05 15:04:17,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:17,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:17,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:17,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:04:17,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:17,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:17,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:17,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:17,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:17,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:17,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:17,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:04:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:17,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389247752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:17,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:17,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:04:17,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867463333] [2021-06-05 15:04:17,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:04:17,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:17,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:04:17,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:04:17,433 INFO L87 Difference]: Start difference. First operand 4656 states and 20956 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:18,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:18,675 INFO L93 Difference]: Finished difference Result 6304 states and 27617 transitions. [2021-06-05 15:04:18,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:04:18,676 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:18,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:18,689 INFO L225 Difference]: With dead ends: 6304 [2021-06-05 15:04:18,689 INFO L226 Difference]: Without dead ends: 6223 [2021-06-05 15:04:18,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 791.8ms TimeCoverageRelationStatistics Valid=278, Invalid=1614, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:04:18,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6223 states. [2021-06-05 15:04:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6223 to 4652. [2021-06-05 15:04:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 4.50505267684369) internal successors, (20953), 4651 states have internal predecessors, (20953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 20953 transitions. [2021-06-05 15:04:18,774 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 20953 transitions. Word has length 30 [2021-06-05 15:04:18,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:18,774 INFO L482 AbstractCegarLoop]: Abstraction has 4652 states and 20953 transitions. [2021-06-05 15:04:18,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:18,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 20953 transitions. [2021-06-05 15:04:18,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:18,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:18,782 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:18,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:18,982 INFO L430 AbstractCegarLoop]: === Iteration 132 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:18,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:18,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1970041248, now seen corresponding path program 5 times [2021-06-05 15:04:18,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:18,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564175800] [2021-06-05 15:04:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:19,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:19,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564175800] [2021-06-05 15:04:19,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564175800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:19,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726817755] [2021-06-05 15:04:19,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:19,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:19,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:19,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:19,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:19,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:19,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:19,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:19,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:19,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:04:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:19,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726817755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:19,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:19,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:04:19,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364938974] [2021-06-05 15:04:19,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:19,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:19,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:19,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:19,373 INFO L87 Difference]: Start difference. First operand 4652 states and 20953 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:20,528 INFO L93 Difference]: Finished difference Result 6187 states and 27312 transitions. [2021-06-05 15:04:20,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:04:20,529 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:20,542 INFO L225 Difference]: With dead ends: 6187 [2021-06-05 15:04:20,542 INFO L226 Difference]: Without dead ends: 6106 [2021-06-05 15:04:20,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 805.2ms TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:04:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2021-06-05 15:04:20,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 4662. [2021-06-05 15:04:20,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4662 states, 4661 states have (on average 4.503540012872774) internal successors, (20991), 4661 states have internal predecessors, (20991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4662 states to 4662 states and 20991 transitions. [2021-06-05 15:04:20,666 INFO L78 Accepts]: Start accepts. Automaton has 4662 states and 20991 transitions. Word has length 30 [2021-06-05 15:04:20,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:20,666 INFO L482 AbstractCegarLoop]: Abstraction has 4662 states and 20991 transitions. [2021-06-05 15:04:20,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4662 states and 20991 transitions. [2021-06-05 15:04:20,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:20,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:20,674 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:20,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:20,874 INFO L430 AbstractCegarLoop]: === Iteration 133 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:20,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:20,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1818579782, now seen corresponding path program 6 times [2021-06-05 15:04:20,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:20,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878707930] [2021-06-05 15:04:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:21,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:21,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878707930] [2021-06-05 15:04:21,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878707930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:21,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095436512] [2021-06-05 15:04:21,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:21,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:21,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:21,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:21,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:21,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:21,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:21,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:21,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:21,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 15:04:21,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:21,315 INFO L628 ElimStorePlain]: treesize reduction 27, result has 50.0 percent of original size [2021-06-05 15:04:21,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:21,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 15:04:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:21,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095436512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:21,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:21,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:04:21,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194006229] [2021-06-05 15:04:21,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:04:21,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:21,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:04:21,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:04:21,419 INFO L87 Difference]: Start difference. First operand 4662 states and 20991 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:23,258 INFO L93 Difference]: Finished difference Result 6267 states and 27331 transitions. [2021-06-05 15:04:23,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:04:23,259 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:23,272 INFO L225 Difference]: With dead ends: 6267 [2021-06-05 15:04:23,273 INFO L226 Difference]: Without dead ends: 6121 [2021-06-05 15:04:23,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1234.9ms TimeCoverageRelationStatistics Valid=468, Invalid=2502, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:04:23,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6121 states. [2021-06-05 15:04:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6121 to 4638. [2021-06-05 15:04:23,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4637 states have (on average 4.509381065343972) internal successors, (20910), 4637 states have internal predecessors, (20910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 20910 transitions. [2021-06-05 15:04:23,388 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 20910 transitions. Word has length 30 [2021-06-05 15:04:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:23,388 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 20910 transitions. [2021-06-05 15:04:23,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,389 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 20910 transitions. [2021-06-05 15:04:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:23,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:23,397 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:23,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:23,597 INFO L430 AbstractCegarLoop]: === Iteration 134 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:23,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:23,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1727284940, now seen corresponding path program 51 times [2021-06-05 15:04:23,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:23,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101377258] [2021-06-05 15:04:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:23,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:23,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101377258] [2021-06-05 15:04:23,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101377258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:23,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404799615] [2021-06-05 15:04:23,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:23,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:04:23,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:23,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:04:23,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:24,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:24,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:24,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:24,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 15:04:24,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:24,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:24,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:24,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:93 [2021-06-05 15:04:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:24,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404799615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:24,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:24,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:04:24,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045223683] [2021-06-05 15:04:24,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:04:24,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:24,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:04:24,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:24,256 INFO L87 Difference]: Start difference. First operand 4638 states and 20910 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:27,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:27,100 INFO L93 Difference]: Finished difference Result 6309 states and 27411 transitions. [2021-06-05 15:04:27,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:04:27,100 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:27,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:27,114 INFO L225 Difference]: With dead ends: 6309 [2021-06-05 15:04:27,114 INFO L226 Difference]: Without dead ends: 5982 [2021-06-05 15:04:27,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2159.0ms TimeCoverageRelationStatistics Valid=541, Invalid=2429, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:04:27,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5982 states. [2021-06-05 15:04:27,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5982 to 4673. [2021-06-05 15:04:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4672 states have (on average 4.513270547945205) internal successors, (21086), 4672 states have internal predecessors, (21086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 21086 transitions. [2021-06-05 15:04:27,214 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 21086 transitions. Word has length 30 [2021-06-05 15:04:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:27,214 INFO L482 AbstractCegarLoop]: Abstraction has 4673 states and 21086 transitions. [2021-06-05 15:04:27,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 21086 transitions. [2021-06-05 15:04:27,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:27,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:27,222 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:27,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:27,422 INFO L430 AbstractCegarLoop]: === Iteration 135 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:27,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:27,423 INFO L82 PathProgramCache]: Analyzing trace with hash 806718224, now seen corresponding path program 7 times [2021-06-05 15:04:27,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:27,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982657202] [2021-06-05 15:04:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:27,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:27,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982657202] [2021-06-05 15:04:27,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982657202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:27,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102012367] [2021-06-05 15:04:27,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:27,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:27,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:27,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:27,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:27,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:27,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:04:27,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:27,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:27,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:27,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 15:04:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:28,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102012367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:28,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:28,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:04:28,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877552355] [2021-06-05 15:04:28,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:04:28,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:28,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:04:28,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:28,060 INFO L87 Difference]: Start difference. First operand 4673 states and 21086 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:29,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:29,441 INFO L93 Difference]: Finished difference Result 5776 states and 25526 transitions. [2021-06-05 15:04:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:04:29,441 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:29,453 INFO L225 Difference]: With dead ends: 5776 [2021-06-05 15:04:29,453 INFO L226 Difference]: Without dead ends: 5695 [2021-06-05 15:04:29,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 879.7ms TimeCoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:04:29,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5695 states. [2021-06-05 15:04:29,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5695 to 4673. [2021-06-05 15:04:29,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4672 states have (on average 4.513270547945205) internal successors, (21086), 4672 states have internal predecessors, (21086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 21086 transitions. [2021-06-05 15:04:29,534 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 21086 transitions. Word has length 30 [2021-06-05 15:04:29,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:29,534 INFO L482 AbstractCegarLoop]: Abstraction has 4673 states and 21086 transitions. [2021-06-05 15:04:29,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:29,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 21086 transitions. [2021-06-05 15:04:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:29,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:29,542 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:29,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-06-05 15:04:29,743 INFO L430 AbstractCegarLoop]: === Iteration 136 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:29,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:29,743 INFO L82 PathProgramCache]: Analyzing trace with hash 594062564, now seen corresponding path program 52 times [2021-06-05 15:04:29,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:29,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225623140] [2021-06-05 15:04:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:30,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:30,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225623140] [2021-06-05 15:04:30,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225623140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:30,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231421663] [2021-06-05 15:04:30,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:30,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:30,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:30,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:30,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:30,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:30,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:30,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:30,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:04:30,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:30,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:30,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:30,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:04:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:30,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231421663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:30,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:30,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:04:30,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93894476] [2021-06-05 15:04:30,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:04:30,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:30,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:04:30,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:04:30,379 INFO L87 Difference]: Start difference. First operand 4673 states and 21086 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:30,807 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-05 15:04:31,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:31,901 INFO L93 Difference]: Finished difference Result 5436 states and 24076 transitions. [2021-06-05 15:04:31,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:04:31,901 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:31,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:31,913 INFO L225 Difference]: With dead ends: 5436 [2021-06-05 15:04:31,913 INFO L226 Difference]: Without dead ends: 5363 [2021-06-05 15:04:31,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1327.5ms TimeCoverageRelationStatistics Valid=200, Invalid=1282, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:04:31,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5363 states. [2021-06-05 15:04:31,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5363 to 4690. [2021-06-05 15:04:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4690 states, 4689 states have (on average 4.512689272766048) internal successors, (21160), 4689 states have internal predecessors, (21160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 21160 transitions. [2021-06-05 15:04:31,992 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 21160 transitions. Word has length 30 [2021-06-05 15:04:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:31,992 INFO L482 AbstractCegarLoop]: Abstraction has 4690 states and 21160 transitions. [2021-06-05 15:04:31,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:31,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 21160 transitions. [2021-06-05 15:04:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:32,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:32,001 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:32,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 15:04:32,201 INFO L430 AbstractCegarLoop]: === Iteration 137 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:32,201 INFO L82 PathProgramCache]: Analyzing trace with hash -801524512, now seen corresponding path program 53 times [2021-06-05 15:04:32,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:32,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345202775] [2021-06-05 15:04:32,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:32,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:32,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345202775] [2021-06-05 15:04:32,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345202775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:32,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758720656] [2021-06-05 15:04:32,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:32,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:04:32,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:32,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:32,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:32,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:32,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:32,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:32,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:32,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 15:04:32,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:32,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:32,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:32,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:91 [2021-06-05 15:04:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:32,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758720656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:32,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:32,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:04:32,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574326210] [2021-06-05 15:04:32,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:04:32,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:32,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:04:32,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:04:32,935 INFO L87 Difference]: Start difference. First operand 4690 states and 21160 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:33,407 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 15:04:33,578 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-06-05 15:04:34,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:34,757 INFO L93 Difference]: Finished difference Result 5502 states and 24471 transitions. [2021-06-05 15:04:34,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:04:34,758 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:34,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:34,769 INFO L225 Difference]: With dead ends: 5502 [2021-06-05 15:04:34,770 INFO L226 Difference]: Without dead ends: 5439 [2021-06-05 15:04:34,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1609.4ms TimeCoverageRelationStatistics Valid=289, Invalid=1967, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:04:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5439 states. [2021-06-05 15:04:34,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5439 to 4692. [2021-06-05 15:04:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 4691 states have (on average 4.512044340225964) internal successors, (21166), 4691 states have internal predecessors, (21166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:34,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 21166 transitions. [2021-06-05 15:04:34,845 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 21166 transitions. Word has length 30 [2021-06-05 15:04:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:34,845 INFO L482 AbstractCegarLoop]: Abstraction has 4692 states and 21166 transitions. [2021-06-05 15:04:34,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:34,846 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 21166 transitions. [2021-06-05 15:04:34,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:34,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:34,853 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:35,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 15:04:35,053 INFO L430 AbstractCegarLoop]: === Iteration 138 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:35,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:35,054 INFO L82 PathProgramCache]: Analyzing trace with hash 492452108, now seen corresponding path program 54 times [2021-06-05 15:04:35,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:35,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795682988] [2021-06-05 15:04:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:35,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:35,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795682988] [2021-06-05 15:04:35,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795682988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:35,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329779351] [2021-06-05 15:04:35,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:35,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:35,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:35,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:35,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:35,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:35,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:35,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:35,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 52 [2021-06-05 15:04:35,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:35,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:35,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:35,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:24 [2021-06-05 15:04:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:35,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329779351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:35,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:35,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:04:35,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816331015] [2021-06-05 15:04:35,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:04:35,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:35,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:04:35,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:04:35,680 INFO L87 Difference]: Start difference. First operand 4692 states and 21166 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:37,348 INFO L93 Difference]: Finished difference Result 5964 states and 26266 transitions. [2021-06-05 15:04:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:04:37,349 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:37,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:37,361 INFO L225 Difference]: With dead ends: 5964 [2021-06-05 15:04:37,361 INFO L226 Difference]: Without dead ends: 5867 [2021-06-05 15:04:37,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1239.5ms TimeCoverageRelationStatistics Valid=276, Invalid=2076, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:04:37,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5867 states. [2021-06-05 15:04:37,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5867 to 4692. [2021-06-05 15:04:37,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 4691 states have (on average 4.512044340225964) internal successors, (21166), 4691 states have internal predecessors, (21166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 21166 transitions. [2021-06-05 15:04:37,445 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 21166 transitions. Word has length 30 [2021-06-05 15:04:37,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:37,445 INFO L482 AbstractCegarLoop]: Abstraction has 4692 states and 21166 transitions. [2021-06-05 15:04:37,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 21166 transitions. [2021-06-05 15:04:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:37,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:37,453 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:37,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 15:04:37,653 INFO L430 AbstractCegarLoop]: === Iteration 139 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:37,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:37,653 INFO L82 PathProgramCache]: Analyzing trace with hash -172480814, now seen corresponding path program 8 times [2021-06-05 15:04:37,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:37,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258212878] [2021-06-05 15:04:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:37,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:37,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258212878] [2021-06-05 15:04:37,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258212878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:37,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295467210] [2021-06-05 15:04:37,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:37,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:37,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:37,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:37,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:38,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:38,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:38,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:38,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:38,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 15:04:38,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:38,198 INFO L628 ElimStorePlain]: treesize reduction 33, result has 52.2 percent of original size [2021-06-05 15:04:38,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:38,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:50 [2021-06-05 15:04:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:38,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295467210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:38,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:38,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:04:38,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820163162] [2021-06-05 15:04:38,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:04:38,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:38,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:04:38,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:04:38,321 INFO L87 Difference]: Start difference. First operand 4692 states and 21166 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:40,230 INFO L93 Difference]: Finished difference Result 5549 states and 24307 transitions. [2021-06-05 15:04:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:04:40,230 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:40,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:40,241 INFO L225 Difference]: With dead ends: 5549 [2021-06-05 15:04:40,241 INFO L226 Difference]: Without dead ends: 5387 [2021-06-05 15:04:40,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1367.6ms TimeCoverageRelationStatistics Valid=269, Invalid=1893, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:04:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5387 states. [2021-06-05 15:04:40,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5387 to 4692. [2021-06-05 15:04:40,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 4691 states have (on average 4.512044340225964) internal successors, (21166), 4691 states have internal predecessors, (21166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:40,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 21166 transitions. [2021-06-05 15:04:40,317 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 21166 transitions. Word has length 30 [2021-06-05 15:04:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:40,317 INFO L482 AbstractCegarLoop]: Abstraction has 4692 states and 21166 transitions. [2021-06-05 15:04:40,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:40,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 21166 transitions. [2021-06-05 15:04:40,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:40,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:40,325 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:40,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 15:04:40,525 INFO L430 AbstractCegarLoop]: === Iteration 140 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:40,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:40,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1897976964, now seen corresponding path program 9 times [2021-06-05 15:04:40,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:40,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387847385] [2021-06-05 15:04:40,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:40,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:40,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387847385] [2021-06-05 15:04:40,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387847385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:40,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813528697] [2021-06-05 15:04:40,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:40,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:04:40,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:40,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:04:40,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:40,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:40,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:41,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:41,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 15:04:41,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:41,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:41,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:41,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:92 [2021-06-05 15:04:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:41,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813528697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:41,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:41,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 15:04:41,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409931538] [2021-06-05 15:04:41,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:41,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:41,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:41,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:41,263 INFO L87 Difference]: Start difference. First operand 4692 states and 21166 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:43,498 INFO L93 Difference]: Finished difference Result 5334 states and 23569 transitions. [2021-06-05 15:04:43,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:04:43,498 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:43,509 INFO L225 Difference]: With dead ends: 5334 [2021-06-05 15:04:43,509 INFO L226 Difference]: Without dead ends: 5252 [2021-06-05 15:04:43,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1766.0ms TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:04:43,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5252 states. [2021-06-05 15:04:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5252 to 4697. [2021-06-05 15:04:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4697 states, 4696 states have (on average 4.5119250425894375) internal successors, (21188), 4696 states have internal predecessors, (21188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:43,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 21188 transitions. [2021-06-05 15:04:43,583 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 21188 transitions. Word has length 30 [2021-06-05 15:04:43,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:43,583 INFO L482 AbstractCegarLoop]: Abstraction has 4697 states and 21188 transitions. [2021-06-05 15:04:43,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:43,584 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 21188 transitions. [2021-06-05 15:04:43,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:43,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:43,591 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:43,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:43,792 INFO L430 AbstractCegarLoop]: === Iteration 141 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:43,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:43,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1365219982, now seen corresponding path program 10 times [2021-06-05 15:04:43,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:43,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861231208] [2021-06-05 15:04:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:44,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:44,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861231208] [2021-06-05 15:04:44,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861231208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:44,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117798603] [2021-06-05 15:04:44,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:44,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:44,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:44,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:44,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:44,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:44,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:44,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:44,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:04:44,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:44,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:44,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:44,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:04:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:44,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117798603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:44,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:44,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 15:04:44,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833509447] [2021-06-05 15:04:44,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:04:44,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:44,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:04:44,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:44,275 INFO L87 Difference]: Start difference. First operand 4697 states and 21188 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:45,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:45,318 INFO L93 Difference]: Finished difference Result 5319 states and 23629 transitions. [2021-06-05 15:04:45,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:04:45,318 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:45,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:45,330 INFO L225 Difference]: With dead ends: 5319 [2021-06-05 15:04:45,330 INFO L226 Difference]: Without dead ends: 5244 [2021-06-05 15:04:45,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 639.1ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:04:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5244 states. [2021-06-05 15:04:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5244 to 4693. [2021-06-05 15:04:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4693 states, 4692 states have (on average 4.512787723785166) internal successors, (21174), 4692 states have internal predecessors, (21174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 21174 transitions. [2021-06-05 15:04:45,412 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 21174 transitions. Word has length 30 [2021-06-05 15:04:45,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:45,412 INFO L482 AbstractCegarLoop]: Abstraction has 4693 states and 21174 transitions. [2021-06-05 15:04:45,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:45,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 21174 transitions. [2021-06-05 15:04:45,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:45,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:45,421 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:45,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:45,621 INFO L430 AbstractCegarLoop]: === Iteration 142 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:45,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:45,621 INFO L82 PathProgramCache]: Analyzing trace with hash 87177790, now seen corresponding path program 55 times [2021-06-05 15:04:45,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:45,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330739405] [2021-06-05 15:04:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:45,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:45,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330739405] [2021-06-05 15:04:45,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330739405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:45,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104780478] [2021-06-05 15:04:45,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:45,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:45,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:46,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:46,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:46,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:46,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:04:46,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:46,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:46,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:46,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 15:04:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:46,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104780478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:46,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:46,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:04:46,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230722188] [2021-06-05 15:04:46,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:04:46,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:46,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:04:46,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:04:46,274 INFO L87 Difference]: Start difference. First operand 4693 states and 21174 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:48,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:48,385 INFO L93 Difference]: Finished difference Result 5914 states and 25887 transitions. [2021-06-05 15:04:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:04:48,386 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:48,398 INFO L225 Difference]: With dead ends: 5914 [2021-06-05 15:04:48,399 INFO L226 Difference]: Without dead ends: 5813 [2021-06-05 15:04:48,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1568.7ms TimeCoverageRelationStatistics Valid=322, Invalid=1934, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:04:48,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5813 states. [2021-06-05 15:04:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5813 to 4724. [2021-06-05 15:04:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4723 states have (on average 4.517044251535041) internal successors, (21334), 4723 states have internal predecessors, (21334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:48,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 21334 transitions. [2021-06-05 15:04:48,481 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 21334 transitions. Word has length 30 [2021-06-05 15:04:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:48,481 INFO L482 AbstractCegarLoop]: Abstraction has 4724 states and 21334 transitions. [2021-06-05 15:04:48,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:48,481 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 21334 transitions. [2021-06-05 15:04:48,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:48,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:48,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:48,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-05 15:04:48,689 INFO L430 AbstractCegarLoop]: === Iteration 143 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:48,689 INFO L82 PathProgramCache]: Analyzing trace with hash -577755132, now seen corresponding path program 11 times [2021-06-05 15:04:48,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:48,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948065427] [2021-06-05 15:04:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:48,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:48,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948065427] [2021-06-05 15:04:48,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948065427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:48,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630741771] [2021-06-05 15:04:48,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:48,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:48,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:48,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:48,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:49,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:49,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:49,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:49,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:49,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 15:04:49,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:49,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:49,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:49,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:18 [2021-06-05 15:04:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:49,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630741771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:49,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:49,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:04:49,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267303185] [2021-06-05 15:04:49,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:04:49,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:49,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:04:49,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:04:49,349 INFO L87 Difference]: Start difference. First operand 4724 states and 21334 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:50,919 INFO L93 Difference]: Finished difference Result 6083 states and 26763 transitions. [2021-06-05 15:04:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:04:50,919 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:50,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:50,932 INFO L225 Difference]: With dead ends: 6083 [2021-06-05 15:04:50,932 INFO L226 Difference]: Without dead ends: 6002 [2021-06-05 15:04:50,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1231.8ms TimeCoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:04:50,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2021-06-05 15:04:50,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 4732. [2021-06-05 15:04:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4732 states, 4731 states have (on average 4.515113083914605) internal successors, (21361), 4731 states have internal predecessors, (21361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:51,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4732 states to 4732 states and 21361 transitions. [2021-06-05 15:04:51,015 INFO L78 Accepts]: Start accepts. Automaton has 4732 states and 21361 transitions. Word has length 30 [2021-06-05 15:04:51,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:51,015 INFO L482 AbstractCegarLoop]: Abstraction has 4732 states and 21361 transitions. [2021-06-05 15:04:51,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4732 states and 21361 transitions. [2021-06-05 15:04:51,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:51,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:51,023 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:51,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 15:04:51,224 INFO L430 AbstractCegarLoop]: === Iteration 144 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:51,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:51,224 INFO L82 PathProgramCache]: Analyzing trace with hash -346038464, now seen corresponding path program 12 times [2021-06-05 15:04:51,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:51,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535486377] [2021-06-05 15:04:51,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:51,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:51,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535486377] [2021-06-05 15:04:51,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535486377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:51,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016452199] [2021-06-05 15:04:51,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:51,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:51,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:51,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:51,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:51,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:51,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:51,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:51,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-06-05 15:04:51,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:51,687 INFO L628 ElimStorePlain]: treesize reduction 16, result has 63.6 percent of original size [2021-06-05 15:04:51,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:51,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:22 [2021-06-05 15:04:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:51,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016452199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:51,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:51,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:04:51,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922270146] [2021-06-05 15:04:51,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:04:51,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:51,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:04:51,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:04:51,786 INFO L87 Difference]: Start difference. First operand 4732 states and 21361 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:53,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:53,255 INFO L93 Difference]: Finished difference Result 6282 states and 27499 transitions. [2021-06-05 15:04:53,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:04:53,255 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:53,267 INFO L225 Difference]: With dead ends: 6282 [2021-06-05 15:04:53,267 INFO L226 Difference]: Without dead ends: 6064 [2021-06-05 15:04:53,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 948.3ms TimeCoverageRelationStatistics Valid=300, Invalid=1862, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:04:53,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6064 states. [2021-06-05 15:04:53,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6064 to 4747. [2021-06-05 15:04:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4747 states, 4746 states have (on average 4.51369574378424) internal successors, (21422), 4746 states have internal predecessors, (21422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4747 states to 4747 states and 21422 transitions. [2021-06-05 15:04:53,349 INFO L78 Accepts]: Start accepts. Automaton has 4747 states and 21422 transitions. Word has length 30 [2021-06-05 15:04:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:53,349 INFO L482 AbstractCegarLoop]: Abstraction has 4747 states and 21422 transitions. [2021-06-05 15:04:53,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4747 states and 21422 transitions. [2021-06-05 15:04:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:53,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:53,356 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:53,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:53,557 INFO L430 AbstractCegarLoop]: === Iteration 145 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:53,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:53,557 INFO L82 PathProgramCache]: Analyzing trace with hash -852384730, now seen corresponding path program 13 times [2021-06-05 15:04:53,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:53,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962106921] [2021-06-05 15:04:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:53,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:53,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962106921] [2021-06-05 15:04:53,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962106921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:53,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347578295] [2021-06-05 15:04:53,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:53,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:53,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:53,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:53,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:53,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:53,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:04:53,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:54,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:54,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:54,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 15:04:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:54,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347578295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:54,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:54,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:04:54,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236413875] [2021-06-05 15:04:54,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:04:54,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:54,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:04:54,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:54,093 INFO L87 Difference]: Start difference. First operand 4747 states and 21422 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:55,122 INFO L93 Difference]: Finished difference Result 5597 states and 24752 transitions. [2021-06-05 15:04:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:04:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:55,133 INFO L225 Difference]: With dead ends: 5597 [2021-06-05 15:04:55,133 INFO L226 Difference]: Without dead ends: 5524 [2021-06-05 15:04:55,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 722.4ms TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:04:55,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5524 states. [2021-06-05 15:04:55,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5524 to 4739. [2021-06-05 15:04:55,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4739 states, 4738 states have (on average 4.515618404390038) internal successors, (21395), 4738 states have internal predecessors, (21395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4739 states to 4739 states and 21395 transitions. [2021-06-05 15:04:55,216 INFO L78 Accepts]: Start accepts. Automaton has 4739 states and 21395 transitions. Word has length 30 [2021-06-05 15:04:55,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:55,216 INFO L482 AbstractCegarLoop]: Abstraction has 4739 states and 21395 transitions. [2021-06-05 15:04:55,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 4739 states and 21395 transitions. [2021-06-05 15:04:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:55,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:55,225 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:55,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 15:04:55,429 INFO L430 AbstractCegarLoop]: === Iteration 146 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:55,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:55,429 INFO L82 PathProgramCache]: Analyzing trace with hash 496859426, now seen corresponding path program 14 times [2021-06-05 15:04:55,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:55,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395424924] [2021-06-05 15:04:55,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:55,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:55,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395424924] [2021-06-05 15:04:55,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395424924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:55,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818165293] [2021-06-05 15:04:55,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:55,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:55,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:55,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:04:55,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:55,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:55,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:55,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:04:55,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:55,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:55,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:55,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-05 15:04:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:56,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818165293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:56,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:56,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 15:04:56,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552043832] [2021-06-05 15:04:56,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:56,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:56,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:56,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:56,191 INFO L87 Difference]: Start difference. First operand 4739 states and 21395 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:58,468 INFO L93 Difference]: Finished difference Result 5199 states and 23063 transitions. [2021-06-05 15:04:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:04:58,468 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:04:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:58,480 INFO L225 Difference]: With dead ends: 5199 [2021-06-05 15:04:58,480 INFO L226 Difference]: Without dead ends: 5116 [2021-06-05 15:04:58,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1727.4ms TimeCoverageRelationStatistics Valid=234, Invalid=1836, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:04:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5116 states. [2021-06-05 15:04:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5116 to 4742. [2021-06-05 15:04:58,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4742 states, 4741 states have (on average 4.515292132461506) internal successors, (21407), 4741 states have internal predecessors, (21407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4742 states to 4742 states and 21407 transitions. [2021-06-05 15:04:58,557 INFO L78 Accepts]: Start accepts. Automaton has 4742 states and 21407 transitions. Word has length 30 [2021-06-05 15:04:58,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:58,558 INFO L482 AbstractCegarLoop]: Abstraction has 4742 states and 21407 transitions. [2021-06-05 15:04:58,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4742 states and 21407 transitions. [2021-06-05 15:04:58,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:04:58,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:58,568 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:58,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:58,791 INFO L430 AbstractCegarLoop]: === Iteration 147 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:58,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:58,791 INFO L82 PathProgramCache]: Analyzing trace with hash -898727650, now seen corresponding path program 15 times [2021-06-05 15:04:58,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:58,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888391486] [2021-06-05 15:04:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:59,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:59,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888391486] [2021-06-05 15:04:59,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888391486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:59,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867399776] [2021-06-05 15:04:59,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:59,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:59,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:59,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:04:59,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:59,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:59,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:59,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:04:59,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:59,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:59,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:59,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-05 15:04:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:59,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867399776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:59,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:59,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 15:04:59,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980631365] [2021-06-05 15:04:59,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:59,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:59,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:59,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:59,646 INFO L87 Difference]: Start difference. First operand 4742 states and 21407 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:01,766 INFO L93 Difference]: Finished difference Result 5407 states and 23822 transitions. [2021-06-05 15:05:01,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:05:01,767 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:01,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:01,779 INFO L225 Difference]: With dead ends: 5407 [2021-06-05 15:05:01,779 INFO L226 Difference]: Without dead ends: 5245 [2021-06-05 15:05:01,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1772.2ms TimeCoverageRelationStatistics Valid=301, Invalid=1955, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:05:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5245 states. [2021-06-05 15:05:01,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 4743. [2021-06-05 15:05:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 4742 states have (on average 4.51602699283003) internal successors, (21415), 4742 states have internal predecessors, (21415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 21415 transitions. [2021-06-05 15:05:01,860 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 21415 transitions. Word has length 30 [2021-06-05 15:05:01,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:01,860 INFO L482 AbstractCegarLoop]: Abstraction has 4743 states and 21415 transitions. [2021-06-05 15:05:01,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 21415 transitions. [2021-06-05 15:05:01,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:01,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:01,868 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:02,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 15:05:02,069 INFO L430 AbstractCegarLoop]: === Iteration 148 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1262431236, now seen corresponding path program 16 times [2021-06-05 15:05:02,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:02,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512473602] [2021-06-05 15:05:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:02,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:02,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512473602] [2021-06-05 15:05:02,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512473602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:02,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671700750] [2021-06-05 15:05:02,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:02,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:02,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:02,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:02,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:02,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:02,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:05:02,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:05:02,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:05:02,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:02,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:02,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:02,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:05:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:02,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671700750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:02,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:02,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:05:02,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239398886] [2021-06-05 15:05:02,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:05:02,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:02,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:05:02,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:05:02,694 INFO L87 Difference]: Start difference. First operand 4743 states and 21415 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:03,820 INFO L93 Difference]: Finished difference Result 5359 states and 23831 transitions. [2021-06-05 15:05:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:05:03,820 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:03,831 INFO L225 Difference]: With dead ends: 5359 [2021-06-05 15:05:03,831 INFO L226 Difference]: Without dead ends: 5286 [2021-06-05 15:05:03,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 812.9ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:05:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2021-06-05 15:05:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4748. [2021-06-05 15:05:03,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4748 states, 4747 states have (on average 4.515904781967558) internal successors, (21437), 4747 states have internal predecessors, (21437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:03,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4748 states to 4748 states and 21437 transitions. [2021-06-05 15:05:03,912 INFO L78 Accepts]: Start accepts. Automaton has 4748 states and 21437 transitions. Word has length 30 [2021-06-05 15:05:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:03,912 INFO L482 AbstractCegarLoop]: Abstraction has 4748 states and 21437 transitions. [2021-06-05 15:05:03,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4748 states and 21437 transitions. [2021-06-05 15:05:03,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:03,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:03,920 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:04,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 15:05:04,120 INFO L430 AbstractCegarLoop]: === Iteration 149 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:04,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1795188218, now seen corresponding path program 17 times [2021-06-05 15:05:04,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:04,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152495408] [2021-06-05 15:05:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:04,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:04,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152495408] [2021-06-05 15:05:04,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152495408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:04,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336582913] [2021-06-05 15:05:04,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:04,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:05:04,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:04,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:04,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:04,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:04,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:04,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:04,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 15:05:04,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:04,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:04,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:04,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:245 [2021-06-05 15:05:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:04,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336582913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:04,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:04,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 15:05:04,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38382980] [2021-06-05 15:05:04,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:04,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:04,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:04,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:04,899 INFO L87 Difference]: Start difference. First operand 4748 states and 21437 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:06,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:06,203 INFO L93 Difference]: Finished difference Result 5571 states and 24814 transitions. [2021-06-05 15:05:06,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:05:06,203 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:06,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:06,214 INFO L225 Difference]: With dead ends: 5571 [2021-06-05 15:05:06,214 INFO L226 Difference]: Without dead ends: 5534 [2021-06-05 15:05:06,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1155.8ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:05:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5534 states. [2021-06-05 15:05:06,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5534 to 4751. [2021-06-05 15:05:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4751 states, 4750 states have (on average 4.514947368421053) internal successors, (21446), 4750 states have internal predecessors, (21446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4751 states to 4751 states and 21446 transitions. [2021-06-05 15:05:06,292 INFO L78 Accepts]: Start accepts. Automaton has 4751 states and 21446 transitions. Word has length 30 [2021-06-05 15:05:06,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:06,292 INFO L482 AbstractCegarLoop]: Abstraction has 4751 states and 21446 transitions. [2021-06-05 15:05:06,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:06,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4751 states and 21446 transitions. [2021-06-05 15:05:06,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:06,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:06,300 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:06,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 15:05:06,500 INFO L430 AbstractCegarLoop]: === Iteration 150 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:06,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:06,501 INFO L82 PathProgramCache]: Analyzing trace with hash -913654306, now seen corresponding path program 18 times [2021-06-05 15:05:06,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:06,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301498419] [2021-06-05 15:05:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:06,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:06,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301498419] [2021-06-05 15:05:06,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301498419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:06,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118608021] [2021-06-05 15:05:06,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:06,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:05:06,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:06,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:06,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:06,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:06,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:06,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:06,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:05:06,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:06,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:06,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:06,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-06-05 15:05:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:07,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118608021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:07,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:07,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:05:07,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796190472] [2021-06-05 15:05:07,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:05:07,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:07,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:05:07,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:05:07,215 INFO L87 Difference]: Start difference. First operand 4751 states and 21446 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:09,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:09,357 INFO L93 Difference]: Finished difference Result 5714 states and 25269 transitions. [2021-06-05 15:05:09,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:05:09,357 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:09,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:09,369 INFO L225 Difference]: With dead ends: 5714 [2021-06-05 15:05:09,369 INFO L226 Difference]: Without dead ends: 5617 [2021-06-05 15:05:09,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1623.0ms TimeCoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:05:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2021-06-05 15:05:09,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 4769. [2021-06-05 15:05:09,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4769 states, 4768 states have (on average 4.512374161073826) internal successors, (21515), 4768 states have internal predecessors, (21515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 21515 transitions. [2021-06-05 15:05:09,475 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 21515 transitions. Word has length 30 [2021-06-05 15:05:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:09,475 INFO L482 AbstractCegarLoop]: Abstraction has 4769 states and 21515 transitions. [2021-06-05 15:05:09,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:09,476 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 21515 transitions. [2021-06-05 15:05:09,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:09,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:09,483 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:09,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:09,684 INFO L430 AbstractCegarLoop]: === Iteration 151 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:09,684 INFO L82 PathProgramCache]: Analyzing trace with hash 654044294, now seen corresponding path program 19 times [2021-06-05 15:05:09,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:09,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878098391] [2021-06-05 15:05:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:09,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:09,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878098391] [2021-06-05 15:05:09,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878098391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:09,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328050561] [2021-06-05 15:05:09,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:10,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:10,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:10,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:05:10,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:05:10,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:05:10,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:10,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:10,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:10,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:05:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:10,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328050561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:10,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:10,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:05:10,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546677573] [2021-06-05 15:05:10,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:05:10,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:10,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:05:10,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:05:10,284 INFO L87 Difference]: Start difference. First operand 4769 states and 21515 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:11,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:11,380 INFO L93 Difference]: Finished difference Result 5387 states and 23969 transitions. [2021-06-05 15:05:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:05:11,380 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:11,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:11,392 INFO L225 Difference]: With dead ends: 5387 [2021-06-05 15:05:11,392 INFO L226 Difference]: Without dead ends: 5306 [2021-06-05 15:05:11,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 943.1ms TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:05:11,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5306 states. [2021-06-05 15:05:11,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5306 to 4769. [2021-06-05 15:05:11,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4769 states, 4768 states have (on average 4.512374161073826) internal successors, (21515), 4768 states have internal predecessors, (21515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 21515 transitions. [2021-06-05 15:05:11,470 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 21515 transitions. Word has length 30 [2021-06-05 15:05:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:11,471 INFO L482 AbstractCegarLoop]: Abstraction has 4769 states and 21515 transitions. [2021-06-05 15:05:11,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 21515 transitions. [2021-06-05 15:05:11,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:11,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:11,478 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:11,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 15:05:11,679 INFO L430 AbstractCegarLoop]: === Iteration 152 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:11,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:11,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1896558996, now seen corresponding path program 20 times [2021-06-05 15:05:11,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:11,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285699115] [2021-06-05 15:05:11,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:11,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:11,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285699115] [2021-06-05 15:05:11,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285699115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:11,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173420032] [2021-06-05 15:05:11,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:11,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:11,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:11,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:05:11,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:12,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:05:12,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:12,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:05:12,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:12,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:12,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:12,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-05 15:05:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:12,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173420032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:12,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:12,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 15:05:12,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322815378] [2021-06-05 15:05:12,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:12,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:12,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:12,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:12,442 INFO L87 Difference]: Start difference. First operand 4769 states and 21515 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:14,562 INFO L93 Difference]: Finished difference Result 5234 states and 23220 transitions. [2021-06-05 15:05:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:05:14,563 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:14,574 INFO L225 Difference]: With dead ends: 5234 [2021-06-05 15:05:14,574 INFO L226 Difference]: Without dead ends: 5153 [2021-06-05 15:05:14,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1641.3ms TimeCoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:05:14,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5153 states. [2021-06-05 15:05:14,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5153 to 4767. [2021-06-05 15:05:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4767 states, 4766 states have (on average 4.513008812421318) internal successors, (21509), 4766 states have internal predecessors, (21509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4767 states to 4767 states and 21509 transitions. [2021-06-05 15:05:14,655 INFO L78 Accepts]: Start accepts. Automaton has 4767 states and 21509 transitions. Word has length 30 [2021-06-05 15:05:14,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:14,655 INFO L482 AbstractCegarLoop]: Abstraction has 4767 states and 21509 transitions. [2021-06-05 15:05:14,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:14,656 INFO L276 IsEmpty]: Start isEmpty. Operand 4767 states and 21509 transitions. [2021-06-05 15:05:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:14,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:14,663 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:14,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 15:05:14,864 INFO L430 AbstractCegarLoop]: === Iteration 153 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:14,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:14,864 INFO L82 PathProgramCache]: Analyzing trace with hash -474649468, now seen corresponding path program 21 times [2021-06-05 15:05:14,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:14,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091673940] [2021-06-05 15:05:14,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:15,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:15,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091673940] [2021-06-05 15:05:15,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091673940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:15,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828400235] [2021-06-05 15:05:15,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:15,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:05:15,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:15,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:05:15,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:15,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:15,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:05:15,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:15,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:15,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:15,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:05:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:15,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828400235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:15,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:15,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:05:15,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440015857] [2021-06-05 15:05:15,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:15,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:15,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:15,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:15,419 INFO L87 Difference]: Start difference. First operand 4767 states and 21509 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:17,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:17,643 INFO L93 Difference]: Finished difference Result 6960 states and 29725 transitions. [2021-06-05 15:05:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:05:17,643 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:17,658 INFO L225 Difference]: With dead ends: 6960 [2021-06-05 15:05:17,658 INFO L226 Difference]: Without dead ends: 6417 [2021-06-05 15:05:17,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 1779.8ms TimeCoverageRelationStatistics Valid=460, Invalid=3080, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:05:17,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6417 states. [2021-06-05 15:05:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6417 to 4819. [2021-06-05 15:05:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4819 states, 4818 states have (on average 4.5097550850975505) internal successors, (21728), 4818 states have internal predecessors, (21728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:17,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4819 states to 4819 states and 21728 transitions. [2021-06-05 15:05:17,752 INFO L78 Accepts]: Start accepts. Automaton has 4819 states and 21728 transitions. Word has length 30 [2021-06-05 15:05:17,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:17,752 INFO L482 AbstractCegarLoop]: Abstraction has 4819 states and 21728 transitions. [2021-06-05 15:05:17,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:17,752 INFO L276 IsEmpty]: Start isEmpty. Operand 4819 states and 21728 transitions. [2021-06-05 15:05:17,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:17,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:17,760 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:17,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:17,963 INFO L430 AbstractCegarLoop]: === Iteration 154 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:17,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1870236544, now seen corresponding path program 22 times [2021-06-05 15:05:17,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:17,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505131210] [2021-06-05 15:05:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:18,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:18,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505131210] [2021-06-05 15:05:18,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505131210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:18,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067048452] [2021-06-05 15:05:18,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:18,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:18,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:18,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:18,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:18,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:05:18,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:18,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:18,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:18,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:05:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:18,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067048452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:18,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:18,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:05:18,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743464360] [2021-06-05 15:05:18,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:05:18,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:18,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:05:18,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:05:18,395 INFO L87 Difference]: Start difference. First operand 4819 states and 21728 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:20,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:20,634 INFO L93 Difference]: Finished difference Result 6585 states and 28786 transitions. [2021-06-05 15:05:20,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:05:20,635 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:20,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:20,649 INFO L225 Difference]: With dead ends: 6585 [2021-06-05 15:05:20,650 INFO L226 Difference]: Without dead ends: 6502 [2021-06-05 15:05:20,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1595.7ms TimeCoverageRelationStatistics Valid=519, Invalid=2903, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:05:20,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6502 states. [2021-06-05 15:05:20,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6502 to 4819. [2021-06-05 15:05:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4819 states, 4818 states have (on average 4.5097550850975505) internal successors, (21728), 4818 states have internal predecessors, (21728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:20,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4819 states to 4819 states and 21728 transitions. [2021-06-05 15:05:20,742 INFO L78 Accepts]: Start accepts. Automaton has 4819 states and 21728 transitions. Word has length 30 [2021-06-05 15:05:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:20,742 INFO L482 AbstractCegarLoop]: Abstraction has 4819 states and 21728 transitions. [2021-06-05 15:05:20,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 4819 states and 21728 transitions. [2021-06-05 15:05:20,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:20,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:20,750 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:20,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 15:05:20,951 INFO L430 AbstractCegarLoop]: === Iteration 155 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:20,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:20,952 INFO L82 PathProgramCache]: Analyzing trace with hash -576259924, now seen corresponding path program 23 times [2021-06-05 15:05:20,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:20,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890581134] [2021-06-05 15:05:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:21,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:21,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890581134] [2021-06-05 15:05:21,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890581134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:21,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816691024] [2021-06-05 15:05:21,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:21,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:05:21,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:21,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:21,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:21,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:21,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:21,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:21,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-06-05 15:05:21,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:05:21,394 INFO L628 ElimStorePlain]: treesize reduction 31, result has 44.6 percent of original size [2021-06-05 15:05:21,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:21,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-05 15:05:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:21,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816691024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:21,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:21,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:05:21,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350257568] [2021-06-05 15:05:21,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:21,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:21,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:21,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:21,486 INFO L87 Difference]: Start difference. First operand 4819 states and 21728 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:23,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:23,148 INFO L93 Difference]: Finished difference Result 6404 states and 27903 transitions. [2021-06-05 15:05:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:05:23,149 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:23,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:23,161 INFO L225 Difference]: With dead ends: 6404 [2021-06-05 15:05:23,161 INFO L226 Difference]: Without dead ends: 6092 [2021-06-05 15:05:23,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1073.7ms TimeCoverageRelationStatistics Valid=287, Invalid=1783, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:05:23,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6092 states. [2021-06-05 15:05:23,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6092 to 4829. [2021-06-05 15:05:23,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4828 states have (on average 4.508285004142502) internal successors, (21766), 4828 states have internal predecessors, (21766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 21766 transitions. [2021-06-05 15:05:23,249 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 21766 transitions. Word has length 30 [2021-06-05 15:05:23,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:23,249 INFO L482 AbstractCegarLoop]: Abstraction has 4829 states and 21766 transitions. [2021-06-05 15:05:23,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:23,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 21766 transitions. [2021-06-05 15:05:23,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:23,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:23,257 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:23,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 15:05:23,458 INFO L430 AbstractCegarLoop]: === Iteration 156 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:23,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:23,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1241192846, now seen corresponding path program 22 times [2021-06-05 15:05:23,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:23,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467141359] [2021-06-05 15:05:23,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:23,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:23,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467141359] [2021-06-05 15:05:23,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467141359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:23,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607436950] [2021-06-05 15:05:23,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:23,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:23,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:23,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:23,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:23,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:23,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:23,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:23,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:23,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:05:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:23,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607436950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:23,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:23,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:05:23,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847677815] [2021-06-05 15:05:23,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:23,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:23,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:23,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:23,840 INFO L87 Difference]: Start difference. First operand 4829 states and 21766 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:25,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:25,176 INFO L93 Difference]: Finished difference Result 7081 states and 30883 transitions. [2021-06-05 15:05:25,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:05:25,177 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:25,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:25,192 INFO L225 Difference]: With dead ends: 7081 [2021-06-05 15:05:25,192 INFO L226 Difference]: Without dead ends: 6899 [2021-06-05 15:05:25,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 948.2ms TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:05:25,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-06-05 15:05:25,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 4893. [2021-06-05 15:05:25,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4892 states have (on average 4.507563368765331) internal successors, (22051), 4892 states have internal predecessors, (22051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 22051 transitions. [2021-06-05 15:05:25,287 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 22051 transitions. Word has length 30 [2021-06-05 15:05:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:25,287 INFO L482 AbstractCegarLoop]: Abstraction has 4893 states and 22051 transitions. [2021-06-05 15:05:25,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 22051 transitions. [2021-06-05 15:05:25,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:25,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:25,295 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:25,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:25,496 INFO L430 AbstractCegarLoop]: === Iteration 157 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:25,496 INFO L82 PathProgramCache]: Analyzing trace with hash 829264932, now seen corresponding path program 23 times [2021-06-05 15:05:25,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:25,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204426585] [2021-06-05 15:05:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:25,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:25,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204426585] [2021-06-05 15:05:25,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204426585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:25,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351000023] [2021-06-05 15:05:25,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:25,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:05:25,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:25,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:25,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:25,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:25,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:25,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:25,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 15:05:25,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:25,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:25,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:25,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:217 [2021-06-05 15:05:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:26,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351000023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:26,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:26,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 15:05:26,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995549568] [2021-06-05 15:05:26,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:26,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:26,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:26,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:26,112 INFO L87 Difference]: Start difference. First operand 4893 states and 22051 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:27,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:27,585 INFO L93 Difference]: Finished difference Result 6033 states and 26549 transitions. [2021-06-05 15:05:27,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:05:27,585 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:27,598 INFO L225 Difference]: With dead ends: 6033 [2021-06-05 15:05:27,598 INFO L226 Difference]: Without dead ends: 5942 [2021-06-05 15:05:27,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1088.2ms TimeCoverageRelationStatistics Valid=239, Invalid=1567, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:05:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2021-06-05 15:05:27,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 4910. [2021-06-05 15:05:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 4909 states have (on average 4.506416785496028) internal successors, (22122), 4909 states have internal predecessors, (22122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 22122 transitions. [2021-06-05 15:05:27,688 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 22122 transitions. Word has length 30 [2021-06-05 15:05:27,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:27,688 INFO L482 AbstractCegarLoop]: Abstraction has 4910 states and 22122 transitions. [2021-06-05 15:05:27,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:27,688 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 22122 transitions. [2021-06-05 15:05:27,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:27,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:27,699 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:27,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:27,899 INFO L430 AbstractCegarLoop]: === Iteration 158 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:27,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1504446866, now seen corresponding path program 24 times [2021-06-05 15:05:27,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:27,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180409623] [2021-06-05 15:05:27,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:28,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:28,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180409623] [2021-06-05 15:05:28,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180409623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:28,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684172616] [2021-06-05 15:05:28,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:28,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:05:28,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:28,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:05:28,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:28,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:28,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:05:28,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:28,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:28,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:28,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:05:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:28,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684172616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:28,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:28,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:05:28,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362469146] [2021-06-05 15:05:28,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:28,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:28,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:28,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:28,413 INFO L87 Difference]: Start difference. First operand 4910 states and 22122 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:30,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:30,096 INFO L93 Difference]: Finished difference Result 6939 states and 30023 transitions. [2021-06-05 15:05:30,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:05:30,096 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:30,113 INFO L225 Difference]: With dead ends: 6939 [2021-06-05 15:05:30,113 INFO L226 Difference]: Without dead ends: 6759 [2021-06-05 15:05:30,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1291.5ms TimeCoverageRelationStatistics Valid=391, Invalid=2261, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:05:30,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6759 states. [2021-06-05 15:05:30,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6759 to 4930. [2021-06-05 15:05:30,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4930 states, 4929 states have (on average 4.504564820450396) internal successors, (22203), 4929 states have internal predecessors, (22203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:30,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 22203 transitions. [2021-06-05 15:05:30,218 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 22203 transitions. Word has length 30 [2021-06-05 15:05:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:30,218 INFO L482 AbstractCegarLoop]: Abstraction has 4930 states and 22203 transitions. [2021-06-05 15:05:30,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 22203 transitions. [2021-06-05 15:05:30,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:30,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:30,227 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:30,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:30,428 INFO L430 AbstractCegarLoop]: === Iteration 159 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:30,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:30,428 INFO L82 PathProgramCache]: Analyzing trace with hash 296507950, now seen corresponding path program 25 times [2021-06-05 15:05:30,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:30,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015960875] [2021-06-05 15:05:30,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:30,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:30,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015960875] [2021-06-05 15:05:30,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015960875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:30,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520153479] [2021-06-05 15:05:30,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:30,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:30,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:30,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:05:30,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:30,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:30,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:30,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:05:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:30,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520153479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:30,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:30,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:05:30,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97683625] [2021-06-05 15:05:30,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:05:30,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:30,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:05:30,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:05:30,858 INFO L87 Difference]: Start difference. First operand 4930 states and 22203 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:31,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:31,987 INFO L93 Difference]: Finished difference Result 6471 states and 28440 transitions. [2021-06-05 15:05:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:05:31,988 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:31,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:32,001 INFO L225 Difference]: With dead ends: 6471 [2021-06-05 15:05:32,001 INFO L226 Difference]: Without dead ends: 6389 [2021-06-05 15:05:32,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 806.8ms TimeCoverageRelationStatistics Valid=212, Invalid=1348, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:05:32,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6389 states. [2021-06-05 15:05:32,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6389 to 4922. [2021-06-05 15:05:32,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4922 states, 4921 states have (on average 4.5053850843324525) internal successors, (22171), 4921 states have internal predecessors, (22171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:32,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4922 states to 4922 states and 22171 transitions. [2021-06-05 15:05:32,083 INFO L78 Accepts]: Start accepts. Automaton has 4922 states and 22171 transitions. Word has length 30 [2021-06-05 15:05:32,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:32,083 INFO L482 AbstractCegarLoop]: Abstraction has 4922 states and 22171 transitions. [2021-06-05 15:05:32,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:32,083 INFO L276 IsEmpty]: Start isEmpty. Operand 4922 states and 22171 transitions. [2021-06-05 15:05:32,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:32,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:32,091 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:32,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-05 15:05:32,291 INFO L430 AbstractCegarLoop]: === Iteration 160 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:32,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:32,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1041929016, now seen corresponding path program 24 times [2021-06-05 15:05:32,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:32,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563248514] [2021-06-05 15:05:32,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:32,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:32,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563248514] [2021-06-05 15:05:32,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563248514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:32,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479034796] [2021-06-05 15:05:32,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:32,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:05:32,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:32,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:32,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:32,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:32,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:32,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:32,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:05:32,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:32,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:32,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:32,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-06-05 15:05:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:32,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479034796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:32,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:32,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:05:32,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294504394] [2021-06-05 15:05:32,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:32,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:32,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:32,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:32,839 INFO L87 Difference]: Start difference. First operand 4922 states and 22171 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:35,713 INFO L93 Difference]: Finished difference Result 6213 states and 27211 transitions. [2021-06-05 15:05:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:05:35,714 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:35,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:35,726 INFO L225 Difference]: With dead ends: 6213 [2021-06-05 15:05:35,727 INFO L226 Difference]: Without dead ends: 6108 [2021-06-05 15:05:35,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 2298.3ms TimeCoverageRelationStatistics Valid=527, Invalid=3505, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:05:35,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6108 states. [2021-06-05 15:05:35,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6108 to 4943. [2021-06-05 15:05:35,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4943 states, 4942 states have (on average 4.504249291784703) internal successors, (22260), 4942 states have internal predecessors, (22260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:35,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4943 states to 4943 states and 22260 transitions. [2021-06-05 15:05:35,809 INFO L78 Accepts]: Start accepts. Automaton has 4943 states and 22260 transitions. Word has length 30 [2021-06-05 15:05:35,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:35,809 INFO L482 AbstractCegarLoop]: Abstraction has 4943 states and 22260 transitions. [2021-06-05 15:05:35,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 4943 states and 22260 transitions. [2021-06-05 15:05:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:35,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:35,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:36,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:36,018 INFO L430 AbstractCegarLoop]: === Iteration 161 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:36,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:36,018 INFO L82 PathProgramCache]: Analyzing trace with hash 206885112, now seen corresponding path program 25 times [2021-06-05 15:05:36,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:36,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448375150] [2021-06-05 15:05:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:36,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:36,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448375150] [2021-06-05 15:05:36,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448375150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:36,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985915977] [2021-06-05 15:05:36,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:36,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:36,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:36,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:05:36,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:36,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:36,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:36,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:05:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:36,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985915977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:36,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:36,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:05:36,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150191862] [2021-06-05 15:05:36,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:05:36,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:36,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:05:36,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:05:36,462 INFO L87 Difference]: Start difference. First operand 4943 states and 22260 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:38,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:38,011 INFO L93 Difference]: Finished difference Result 6346 states and 27939 transitions. [2021-06-05 15:05:38,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:05:38,011 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:38,026 INFO L225 Difference]: With dead ends: 6346 [2021-06-05 15:05:38,026 INFO L226 Difference]: Without dead ends: 6300 [2021-06-05 15:05:38,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1221.6ms TimeCoverageRelationStatistics Valid=336, Invalid=1734, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:05:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2021-06-05 15:05:38,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 4925. [2021-06-05 15:05:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4925 states, 4924 states have (on average 4.505077173030057) internal successors, (22183), 4924 states have internal predecessors, (22183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4925 states to 4925 states and 22183 transitions. [2021-06-05 15:05:38,160 INFO L78 Accepts]: Start accepts. Automaton has 4925 states and 22183 transitions. Word has length 30 [2021-06-05 15:05:38,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:38,160 INFO L482 AbstractCegarLoop]: Abstraction has 4925 states and 22183 transitions. [2021-06-05 15:05:38,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:38,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4925 states and 22183 transitions. [2021-06-05 15:05:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:38,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:38,169 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:38,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 15:05:38,369 INFO L430 AbstractCegarLoop]: === Iteration 162 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:38,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:38,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1857451204, now seen corresponding path program 26 times [2021-06-05 15:05:38,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:38,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894204226] [2021-06-05 15:05:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:38,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:38,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894204226] [2021-06-05 15:05:38,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894204226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:38,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103401914] [2021-06-05 15:05:38,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:38,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:38,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:38,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:05:38,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:38,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:38,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:05:38,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:38,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:38,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:38,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:05:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:38,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103401914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:38,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:38,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:05:38,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091181937] [2021-06-05 15:05:38,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:38,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:38,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:38,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:38,851 INFO L87 Difference]: Start difference. First operand 4925 states and 22183 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:41,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:41,205 INFO L93 Difference]: Finished difference Result 6806 states and 29667 transitions. [2021-06-05 15:05:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:05:41,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:41,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:41,220 INFO L225 Difference]: With dead ends: 6806 [2021-06-05 15:05:41,220 INFO L226 Difference]: Without dead ends: 6608 [2021-06-05 15:05:41,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1817.7ms TimeCoverageRelationStatistics Valid=532, Invalid=3250, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:05:41,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2021-06-05 15:05:41,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 4937. [2021-06-05 15:05:41,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4936 states have (on average 4.5040518638573745) internal successors, (22232), 4936 states have internal predecessors, (22232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 22232 transitions. [2021-06-05 15:05:41,342 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 22232 transitions. Word has length 30 [2021-06-05 15:05:41,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:41,342 INFO L482 AbstractCegarLoop]: Abstraction has 4937 states and 22232 transitions. [2021-06-05 15:05:41,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:41,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 22232 transitions. [2021-06-05 15:05:41,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:41,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:41,350 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:41,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 15:05:41,551 INFO L430 AbstractCegarLoop]: === Iteration 163 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:41,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:41,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1493747618, now seen corresponding path program 27 times [2021-06-05 15:05:41,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:41,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211813350] [2021-06-05 15:05:41,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:41,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:41,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211813350] [2021-06-05 15:05:41,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211813350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:41,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113255943] [2021-06-05 15:05:41,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:41,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:05:41,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:41,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:05:41,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:41,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:41,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:05:41,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:41,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:41,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:41,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:05:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:42,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113255943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:42,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:42,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:05:42,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508680908] [2021-06-05 15:05:42,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:42,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:42,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:42,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:42,006 INFO L87 Difference]: Start difference. First operand 4937 states and 22232 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:44,198 INFO L93 Difference]: Finished difference Result 6655 states and 28959 transitions. [2021-06-05 15:05:44,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:05:44,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:44,213 INFO L225 Difference]: With dead ends: 6655 [2021-06-05 15:05:44,213 INFO L226 Difference]: Without dead ends: 6500 [2021-06-05 15:05:44,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1576.3ms TimeCoverageRelationStatistics Valid=430, Invalid=2992, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:05:44,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6500 states. [2021-06-05 15:05:44,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6500 to 4951. [2021-06-05 15:05:44,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4951 states, 4950 states have (on average 4.502222222222223) internal successors, (22286), 4950 states have internal predecessors, (22286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4951 states to 4951 states and 22286 transitions. [2021-06-05 15:05:44,349 INFO L78 Accepts]: Start accepts. Automaton has 4951 states and 22286 transitions. Word has length 30 [2021-06-05 15:05:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:44,349 INFO L482 AbstractCegarLoop]: Abstraction has 4951 states and 22286 transitions. [2021-06-05 15:05:44,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4951 states and 22286 transitions. [2021-06-05 15:05:44,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:44,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:44,357 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:44,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:44,559 INFO L430 AbstractCegarLoop]: === Iteration 164 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:44,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:44,559 INFO L82 PathProgramCache]: Analyzing trace with hash 960990636, now seen corresponding path program 28 times [2021-06-05 15:05:44,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:44,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911730330] [2021-06-05 15:05:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:44,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:44,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911730330] [2021-06-05 15:05:44,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911730330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:44,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765244154] [2021-06-05 15:05:44,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:44,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:44,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:44,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:44,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:44,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:05:44,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:44,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:44,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:44,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:05:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:44,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765244154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:44,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:44,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:05:44,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334300915] [2021-06-05 15:05:44,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:05:44,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:44,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:05:44,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:05:44,914 INFO L87 Difference]: Start difference. First operand 4951 states and 22286 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:46,122 INFO L93 Difference]: Finished difference Result 6344 states and 27927 transitions. [2021-06-05 15:05:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:05:46,122 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:46,137 INFO L225 Difference]: With dead ends: 6344 [2021-06-05 15:05:46,137 INFO L226 Difference]: Without dead ends: 6270 [2021-06-05 15:05:46,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 782.8ms TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:05:46,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6270 states. [2021-06-05 15:05:46,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6270 to 4946. [2021-06-05 15:05:46,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4946 states, 4945 states have (on average 4.502325581395349) internal successors, (22264), 4945 states have internal predecessors, (22264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4946 states to 4946 states and 22264 transitions. [2021-06-05 15:05:46,229 INFO L78 Accepts]: Start accepts. Automaton has 4946 states and 22264 transitions. Word has length 30 [2021-06-05 15:05:46,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:46,229 INFO L482 AbstractCegarLoop]: Abstraction has 4946 states and 22264 transitions. [2021-06-05 15:05:46,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:46,229 INFO L276 IsEmpty]: Start isEmpty. Operand 4946 states and 22264 transitions. [2021-06-05 15:05:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:46,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:46,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:46,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:46,438 INFO L430 AbstractCegarLoop]: === Iteration 165 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:46,439 INFO L82 PathProgramCache]: Analyzing trace with hash -884744148, now seen corresponding path program 29 times [2021-06-05 15:05:46,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:46,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662377251] [2021-06-05 15:05:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:46,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:46,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662377251] [2021-06-05 15:05:46,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662377251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:46,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072380970] [2021-06-05 15:05:46,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:46,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:05:46,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:46,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:46,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:46,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:46,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:05:46,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:05:46,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 15:05:46,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:46,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:46,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:46,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:10 [2021-06-05 15:05:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:46,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072380970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:46,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:46,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:05:46,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903468632] [2021-06-05 15:05:46,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:46,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:46,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:46,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:46,885 INFO L87 Difference]: Start difference. First operand 4946 states and 22264 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:48,831 INFO L93 Difference]: Finished difference Result 6319 states and 27787 transitions. [2021-06-05 15:05:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:05:48,831 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:48,846 INFO L225 Difference]: With dead ends: 6319 [2021-06-05 15:05:48,846 INFO L226 Difference]: Without dead ends: 6238 [2021-06-05 15:05:48,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1346.7ms TimeCoverageRelationStatistics Valid=323, Invalid=1747, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:05:48,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2021-06-05 15:05:48,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 4946. [2021-06-05 15:05:48,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4946 states, 4945 states have (on average 4.502325581395349) internal successors, (22264), 4945 states have internal predecessors, (22264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:48,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4946 states to 4946 states and 22264 transitions. [2021-06-05 15:05:48,940 INFO L78 Accepts]: Start accepts. Automaton has 4946 states and 22264 transitions. Word has length 30 [2021-06-05 15:05:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:48,940 INFO L482 AbstractCegarLoop]: Abstraction has 4946 states and 22264 transitions. [2021-06-05 15:05:48,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 4946 states and 22264 transitions. [2021-06-05 15:05:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:48,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:48,949 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:49,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:49,149 INFO L430 AbstractCegarLoop]: === Iteration 166 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:49,150 INFO L82 PathProgramCache]: Analyzing trace with hash 859619858, now seen corresponding path program 30 times [2021-06-05 15:05:49,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:49,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656769272] [2021-06-05 15:05:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:49,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:49,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656769272] [2021-06-05 15:05:49,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656769272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:49,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159234745] [2021-06-05 15:05:49,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:49,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:05:49,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:49,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:49,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:49,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:49,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:49,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:49,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:05:49,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:49,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:49,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:49,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-06-05 15:05:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:49,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159234745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:49,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:49,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:05:49,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519776300] [2021-06-05 15:05:49,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:49,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:49,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:49,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:49,672 INFO L87 Difference]: Start difference. First operand 4946 states and 22264 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:51,301 INFO L93 Difference]: Finished difference Result 6391 states and 27888 transitions. [2021-06-05 15:05:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:05:51,302 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:51,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:51,317 INFO L225 Difference]: With dead ends: 6391 [2021-06-05 15:05:51,317 INFO L226 Difference]: Without dead ends: 6245 [2021-06-05 15:05:51,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1160.3ms TimeCoverageRelationStatistics Valid=298, Invalid=1864, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:05:51,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6245 states. [2021-06-05 15:05:51,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6245 to 4945. [2021-06-05 15:05:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4945 states, 4944 states have (on average 4.502629449838188) internal successors, (22261), 4944 states have internal predecessors, (22261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:51,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4945 states to 4945 states and 22261 transitions. [2021-06-05 15:05:51,416 INFO L78 Accepts]: Start accepts. Automaton has 4945 states and 22261 transitions. Word has length 30 [2021-06-05 15:05:51,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:51,416 INFO L482 AbstractCegarLoop]: Abstraction has 4945 states and 22261 transitions. [2021-06-05 15:05:51,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:51,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4945 states and 22261 transitions. [2021-06-05 15:05:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:51,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:51,424 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:51,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:51,625 INFO L430 AbstractCegarLoop]: === Iteration 167 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:51,625 INFO L82 PathProgramCache]: Analyzing trace with hash 315030084, now seen corresponding path program 31 times [2021-06-05 15:05:51,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:51,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975197664] [2021-06-05 15:05:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:51,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:51,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975197664] [2021-06-05 15:05:51,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975197664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:51,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445364614] [2021-06-05 15:05:51,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:51,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:51,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:52,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:52,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:52,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:52,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:52,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:05:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:52,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445364614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:52,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:52,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:05:52,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281730015] [2021-06-05 15:05:52,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:05:52,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:52,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:05:52,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:05:52,080 INFO L87 Difference]: Start difference. First operand 4945 states and 22261 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:53,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:53,775 INFO L93 Difference]: Finished difference Result 6831 states and 29854 transitions. [2021-06-05 15:05:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:05:53,776 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:53,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:53,791 INFO L225 Difference]: With dead ends: 6831 [2021-06-05 15:05:53,791 INFO L226 Difference]: Without dead ends: 6649 [2021-06-05 15:05:53,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1069.8ms TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:05:53,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6649 states. [2021-06-05 15:05:53,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6649 to 4995. [2021-06-05 15:05:53,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4995 states, 4994 states have (on average 4.4987985582699235) internal successors, (22467), 4994 states have internal predecessors, (22467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:53,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4995 states to 4995 states and 22467 transitions. [2021-06-05 15:05:53,934 INFO L78 Accepts]: Start accepts. Automaton has 4995 states and 22467 transitions. Word has length 30 [2021-06-05 15:05:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:53,934 INFO L482 AbstractCegarLoop]: Abstraction has 4995 states and 22467 transitions. [2021-06-05 15:05:53,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 4995 states and 22467 transitions. [2021-06-05 15:05:53,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:53,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:53,943 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:54,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:54,144 INFO L430 AbstractCegarLoop]: === Iteration 168 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:54,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:54,144 INFO L82 PathProgramCache]: Analyzing trace with hash -349902838, now seen corresponding path program 26 times [2021-06-05 15:05:54,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:54,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253716483] [2021-06-05 15:05:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:54,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:54,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253716483] [2021-06-05 15:05:54,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253716483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:54,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629091674] [2021-06-05 15:05:54,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:54,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:54,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:54,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:54,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:54,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:54,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:54,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:54,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 15:05:54,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:05:54,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:54,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:54,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 15:05:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:54,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629091674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:54,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:54,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:05:54,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247052376] [2021-06-05 15:05:54,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:05:54,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:54,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:05:54,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:05:54,620 INFO L87 Difference]: Start difference. First operand 4995 states and 22467 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:56,400 INFO L93 Difference]: Finished difference Result 7307 states and 31428 transitions. [2021-06-05 15:05:56,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:05:56,400 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:56,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:56,415 INFO L225 Difference]: With dead ends: 7307 [2021-06-05 15:05:56,415 INFO L226 Difference]: Without dead ends: 6981 [2021-06-05 15:05:56,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1205.0ms TimeCoverageRelationStatistics Valid=386, Invalid=2694, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:05:56,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6981 states. [2021-06-05 15:05:56,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6981 to 5027. [2021-06-05 15:05:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5027 states, 5026 states have (on average 4.49641862315957) internal successors, (22599), 5026 states have internal predecessors, (22599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:56,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5027 states to 5027 states and 22599 transitions. [2021-06-05 15:05:56,518 INFO L78 Accepts]: Start accepts. Automaton has 5027 states and 22599 transitions. Word has length 30 [2021-06-05 15:05:56,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:56,519 INFO L482 AbstractCegarLoop]: Abstraction has 5027 states and 22599 transitions. [2021-06-05 15:05:56,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:56,519 INFO L276 IsEmpty]: Start isEmpty. Operand 5027 states and 22599 transitions. [2021-06-05 15:05:56,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:56,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:56,527 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:56,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-05 15:05:56,728 INFO L430 AbstractCegarLoop]: === Iteration 169 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:56,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:56,728 INFO L82 PathProgramCache]: Analyzing trace with hash 573825408, now seen corresponding path program 32 times [2021-06-05 15:05:56,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:56,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479179709] [2021-06-05 15:05:56,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:56,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:56,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479179709] [2021-06-05 15:05:56,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479179709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:56,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31678943] [2021-06-05 15:05:56,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:57,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:57,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:57,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:05:57,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:57,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:57,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:05:57,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:57,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:57,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:57,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-05 15:05:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:57,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31678943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:57,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:57,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:05:57,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342497614] [2021-06-05 15:05:57,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:57,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:57,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:57,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:57,410 INFO L87 Difference]: Start difference. First operand 5027 states and 22599 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:59,411 INFO L93 Difference]: Finished difference Result 6903 states and 30068 transitions. [2021-06-05 15:05:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:05:59,411 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:05:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:59,426 INFO L225 Difference]: With dead ends: 6903 [2021-06-05 15:05:59,427 INFO L226 Difference]: Without dead ends: 6685 [2021-06-05 15:05:59,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1624.8ms TimeCoverageRelationStatistics Valid=392, Invalid=2364, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:05:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6685 states. [2021-06-05 15:05:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6685 to 5059. [2021-06-05 15:05:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5059 states, 5058 states have (on average 4.494266508501384) internal successors, (22732), 5058 states have internal predecessors, (22732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:59,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5059 states to 5059 states and 22732 transitions. [2021-06-05 15:05:59,525 INFO L78 Accepts]: Start accepts. Automaton has 5059 states and 22732 transitions. Word has length 30 [2021-06-05 15:05:59,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:59,526 INFO L482 AbstractCegarLoop]: Abstraction has 5059 states and 22732 transitions. [2021-06-05 15:05:59,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:59,526 INFO L276 IsEmpty]: Start isEmpty. Operand 5059 states and 22732 transitions. [2021-06-05 15:05:59,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:05:59,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:59,535 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:59,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:59,735 INFO L430 AbstractCegarLoop]: === Iteration 170 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:59,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:59,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1976777882, now seen corresponding path program 33 times [2021-06-05 15:05:59,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:59,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757158964] [2021-06-05 15:05:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:59,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:59,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757158964] [2021-06-05 15:05:59,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757158964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:59,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201400542] [2021-06-05 15:05:59,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:59,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:05:59,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:59,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:05:59,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:00,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:00,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:06:00,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:00,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:00,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:00,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-05 15:06:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:00,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201400542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:00,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:00,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:06:00,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020554611] [2021-06-05 15:06:00,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:00,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:00,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:00,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:00,183 INFO L87 Difference]: Start difference. First operand 5059 states and 22732 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:01,857 INFO L93 Difference]: Finished difference Result 6673 states and 29070 transitions. [2021-06-05 15:06:01,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:06:01,857 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:01,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:01,873 INFO L225 Difference]: With dead ends: 6673 [2021-06-05 15:06:01,873 INFO L226 Difference]: Without dead ends: 6491 [2021-06-05 15:06:01,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1157.9ms TimeCoverageRelationStatistics Valid=357, Invalid=1995, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:06:01,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6491 states. [2021-06-05 15:06:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6491 to 5037. [2021-06-05 15:06:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5037 states, 5036 states have (on average 4.4976171564733916) internal successors, (22650), 5036 states have internal predecessors, (22650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5037 states to 5037 states and 22650 transitions. [2021-06-05 15:06:01,969 INFO L78 Accepts]: Start accepts. Automaton has 5037 states and 22650 transitions. Word has length 30 [2021-06-05 15:06:01,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:01,969 INFO L482 AbstractCegarLoop]: Abstraction has 5037 states and 22650 transitions. [2021-06-05 15:06:01,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:01,969 INFO L276 IsEmpty]: Start isEmpty. Operand 5037 states and 22650 transitions. [2021-06-05 15:06:01,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:01,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:01,977 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:02,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 15:06:02,178 INFO L430 AbstractCegarLoop]: === Iteration 171 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:02,178 INFO L82 PathProgramCache]: Analyzing trace with hash 902123386, now seen corresponding path program 56 times [2021-06-05 15:06:02,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:02,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451999504] [2021-06-05 15:06:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:02,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:02,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451999504] [2021-06-05 15:06:02,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451999504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:02,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860776153] [2021-06-05 15:06:02,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:02,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:02,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:02,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:06:02,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:02,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:02,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:02,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:06:02,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:02,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:02,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:02,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-06-05 15:06:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:02,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860776153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:02,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:02,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:06:02,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907147587] [2021-06-05 15:06:02,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:06:02,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:02,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:06:02,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:06:02,833 INFO L87 Difference]: Start difference. First operand 5037 states and 22650 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:05,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:05,142 INFO L93 Difference]: Finished difference Result 6614 states and 28524 transitions. [2021-06-05 15:06:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:06:05,142 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:05,155 INFO L225 Difference]: With dead ends: 6614 [2021-06-05 15:06:05,155 INFO L226 Difference]: Without dead ends: 6140 [2021-06-05 15:06:05,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1744.1ms TimeCoverageRelationStatistics Valid=375, Invalid=2075, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:06:05,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6140 states. [2021-06-05 15:06:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6140 to 5038. [2021-06-05 15:06:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5038 states, 5037 states have (on average 4.49811395672027) internal successors, (22657), 5037 states have internal predecessors, (22657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5038 states to 5038 states and 22657 transitions. [2021-06-05 15:06:05,238 INFO L78 Accepts]: Start accepts. Automaton has 5038 states and 22657 transitions. Word has length 30 [2021-06-05 15:06:05,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:05,238 INFO L482 AbstractCegarLoop]: Abstraction has 5038 states and 22657 transitions. [2021-06-05 15:06:05,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 5038 states and 22657 transitions. [2021-06-05 15:06:05,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:05,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:05,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:05,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:05,449 INFO L430 AbstractCegarLoop]: === Iteration 172 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:05,449 INFO L82 PathProgramCache]: Analyzing trace with hash -639544558, now seen corresponding path program 34 times [2021-06-05 15:06:05,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:05,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889752136] [2021-06-05 15:06:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:05,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:05,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889752136] [2021-06-05 15:06:05,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889752136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:05,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431004782] [2021-06-05 15:06:05,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:05,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:05,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:05,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:05,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:05,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:05,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:05,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:05,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:06:05,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:05,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:05,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:05,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:06:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:05,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431004782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:05,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:05,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 15:06:05,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587581926] [2021-06-05 15:06:05,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:06:05,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:05,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:06:05,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:06:05,932 INFO L87 Difference]: Start difference. First operand 5038 states and 22657 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:06,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:06,806 INFO L93 Difference]: Finished difference Result 5614 states and 24911 transitions. [2021-06-05 15:06:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:06:06,806 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:06,819 INFO L225 Difference]: With dead ends: 5614 [2021-06-05 15:06:06,819 INFO L226 Difference]: Without dead ends: 5568 [2021-06-05 15:06:06,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 585.4ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:06:06,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5568 states. [2021-06-05 15:06:06,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5568 to 5010. [2021-06-05 15:06:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5010 states, 5009 states have (on average 4.501497304851267) internal successors, (22548), 5009 states have internal predecessors, (22548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5010 states to 5010 states and 22548 transitions. [2021-06-05 15:06:06,908 INFO L78 Accepts]: Start accepts. Automaton has 5010 states and 22548 transitions. Word has length 30 [2021-06-05 15:06:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:06,908 INFO L482 AbstractCegarLoop]: Abstraction has 5010 states and 22548 transitions. [2021-06-05 15:06:06,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand 5010 states and 22548 transitions. [2021-06-05 15:06:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:06,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:06,916 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:07,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:07,117 INFO L430 AbstractCegarLoop]: === Iteration 173 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:07,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1582606780, now seen corresponding path program 1 times [2021-06-05 15:06:07,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:07,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221824375] [2021-06-05 15:06:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:07,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:07,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221824375] [2021-06-05 15:06:07,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221824375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:07,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081426723] [2021-06-05 15:06:07,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:07,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:07,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:07,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:07,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:07,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:07,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:06:07,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:07,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:07,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:07,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:06:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:07,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081426723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:07,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:07,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 15:06:07,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452734608] [2021-06-05 15:06:07,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:06:07,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:07,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:06:07,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:06:07,535 INFO L87 Difference]: Start difference. First operand 5010 states and 22548 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:08,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:08,429 INFO L93 Difference]: Finished difference Result 5753 states and 25486 transitions. [2021-06-05 15:06:08,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:06:08,429 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:08,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:08,442 INFO L225 Difference]: With dead ends: 5753 [2021-06-05 15:06:08,442 INFO L226 Difference]: Without dead ends: 5680 [2021-06-05 15:06:08,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 376.3ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5680 states. [2021-06-05 15:06:08,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5680 to 5050. [2021-06-05 15:06:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5050 states, 5049 states have (on average 4.503862150920974) internal successors, (22740), 5049 states have internal predecessors, (22740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:08,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5050 states to 5050 states and 22740 transitions. [2021-06-05 15:06:08,531 INFO L78 Accepts]: Start accepts. Automaton has 5050 states and 22740 transitions. Word has length 30 [2021-06-05 15:06:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:08,532 INFO L482 AbstractCegarLoop]: Abstraction has 5050 states and 22740 transitions. [2021-06-05 15:06:08,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:08,532 INFO L276 IsEmpty]: Start isEmpty. Operand 5050 states and 22740 transitions. [2021-06-05 15:06:08,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:08,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:08,540 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:08,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-05 15:06:08,741 INFO L430 AbstractCegarLoop]: === Iteration 174 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:08,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:08,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1186289438, now seen corresponding path program 2 times [2021-06-05 15:06:08,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:08,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444358454] [2021-06-05 15:06:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:08,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:08,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444358454] [2021-06-05 15:06:08,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444358454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:08,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786582439] [2021-06-05 15:06:08,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:08,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:08,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:08,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:08,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:09,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:09,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:09,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:09,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:06:09,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:09,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:09,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:09,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:06:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:09,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786582439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:09,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:09,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 15:06:09,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219351720] [2021-06-05 15:06:09,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:06:09,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:09,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:06:09,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:06:09,158 INFO L87 Difference]: Start difference. First operand 5050 states and 22740 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:09,892 INFO L93 Difference]: Finished difference Result 5776 states and 25601 transitions. [2021-06-05 15:06:09,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:06:09,892 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:09,905 INFO L225 Difference]: With dead ends: 5776 [2021-06-05 15:06:09,905 INFO L226 Difference]: Without dead ends: 5701 [2021-06-05 15:06:09,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 391.0ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:09,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5701 states. [2021-06-05 15:06:09,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5701 to 5040. [2021-06-05 15:06:09,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5040 states, 5039 states have (on average 4.504465171661044) internal successors, (22698), 5039 states have internal predecessors, (22698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5040 states to 5040 states and 22698 transitions. [2021-06-05 15:06:09,995 INFO L78 Accepts]: Start accepts. Automaton has 5040 states and 22698 transitions. Word has length 30 [2021-06-05 15:06:09,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:09,995 INFO L482 AbstractCegarLoop]: Abstraction has 5040 states and 22698 transitions. [2021-06-05 15:06:09,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:09,995 INFO L276 IsEmpty]: Start isEmpty. Operand 5040 states and 22698 transitions. [2021-06-05 15:06:10,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:10,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:10,003 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:10,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 15:06:10,204 INFO L430 AbstractCegarLoop]: === Iteration 175 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:10,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:10,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1423372772, now seen corresponding path program 1 times [2021-06-05 15:06:10,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:10,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52262841] [2021-06-05 15:06:10,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:10,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:10,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52262841] [2021-06-05 15:06:10,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52262841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:10,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873420836] [2021-06-05 15:06:10,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:10,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:10,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:10,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:10,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:10,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:10,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:06:10,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:10,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:10,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:10,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:06:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:10,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873420836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:10,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:10,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:06:10,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487100557] [2021-06-05 15:06:10,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:06:10,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:10,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:06:10,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:06:10,683 INFO L87 Difference]: Start difference. First operand 5040 states and 22698 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:11,341 INFO L93 Difference]: Finished difference Result 5575 states and 24791 transitions. [2021-06-05 15:06:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:06:11,341 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:11,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:11,353 INFO L225 Difference]: With dead ends: 5575 [2021-06-05 15:06:11,354 INFO L226 Difference]: Without dead ends: 5502 [2021-06-05 15:06:11,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 535.5ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:06:11,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5502 states. [2021-06-05 15:06:11,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5502 to 5061. [2021-06-05 15:06:11,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5061 states, 5060 states have (on average 4.502766798418972) internal successors, (22784), 5060 states have internal predecessors, (22784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5061 states to 5061 states and 22784 transitions. [2021-06-05 15:06:11,438 INFO L78 Accepts]: Start accepts. Automaton has 5061 states and 22784 transitions. Word has length 30 [2021-06-05 15:06:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:11,438 INFO L482 AbstractCegarLoop]: Abstraction has 5061 states and 22784 transitions. [2021-06-05 15:06:11,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:11,438 INFO L276 IsEmpty]: Start isEmpty. Operand 5061 states and 22784 transitions. [2021-06-05 15:06:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:11,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:11,446 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:11,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:11,647 INFO L430 AbstractCegarLoop]: === Iteration 176 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:11,647 INFO L82 PathProgramCache]: Analyzing trace with hash -802888706, now seen corresponding path program 2 times [2021-06-05 15:06:11,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:11,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601390680] [2021-06-05 15:06:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:11,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:11,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601390680] [2021-06-05 15:06:11,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601390680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:11,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583051718] [2021-06-05 15:06:11,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:11,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:11,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:11,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:11,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:12,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:12,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:12,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:12,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:06:12,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:12,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:12,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:12,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:06:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:12,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583051718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:12,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:12,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 15:06:12,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743559772] [2021-06-05 15:06:12,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:12,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:12,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:12,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:12,054 INFO L87 Difference]: Start difference. First operand 5061 states and 22784 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:12,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:12,902 INFO L93 Difference]: Finished difference Result 5603 states and 24937 transitions. [2021-06-05 15:06:12,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:06:12,902 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:12,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:12,914 INFO L225 Difference]: With dead ends: 5603 [2021-06-05 15:06:12,915 INFO L226 Difference]: Without dead ends: 5537 [2021-06-05 15:06:12,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 500.1ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:06:12,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5537 states. [2021-06-05 15:06:12,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5537 to 5056. [2021-06-05 15:06:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5056 states, 5055 states have (on average 4.503659742828883) internal successors, (22766), 5055 states have internal predecessors, (22766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5056 states to 5056 states and 22766 transitions. [2021-06-05 15:06:13,000 INFO L78 Accepts]: Start accepts. Automaton has 5056 states and 22766 transitions. Word has length 30 [2021-06-05 15:06:13,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:13,000 INFO L482 AbstractCegarLoop]: Abstraction has 5056 states and 22766 transitions. [2021-06-05 15:06:13,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:13,000 INFO L276 IsEmpty]: Start isEmpty. Operand 5056 states and 22766 transitions. [2021-06-05 15:06:13,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:13,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:13,008 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:13,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 15:06:13,209 INFO L430 AbstractCegarLoop]: === Iteration 177 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:13,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1558152092, now seen corresponding path program 3 times [2021-06-05 15:06:13,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:13,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597595785] [2021-06-05 15:06:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:13,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:13,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597595785] [2021-06-05 15:06:13,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597595785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:13,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126205848] [2021-06-05 15:06:13,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:13,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:06:13,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:13,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:13,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:13,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:13,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:13,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:13,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:13,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 15:06:13,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:06:13,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:13,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:13,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:50 [2021-06-05 15:06:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:13,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126205848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:13,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:13,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:06:13,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195077292] [2021-06-05 15:06:13,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:06:13,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:13,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:06:13,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:13,854 INFO L87 Difference]: Start difference. First operand 5056 states and 22766 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:16,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:16,193 INFO L93 Difference]: Finished difference Result 5959 states and 26159 transitions. [2021-06-05 15:06:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:06:16,193 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:16,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:16,206 INFO L225 Difference]: With dead ends: 5959 [2021-06-05 15:06:16,206 INFO L226 Difference]: Without dead ends: 5827 [2021-06-05 15:06:16,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1703.5ms TimeCoverageRelationStatistics Valid=340, Invalid=2416, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:06:16,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5827 states. [2021-06-05 15:06:16,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5827 to 5055. [2021-06-05 15:06:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5055 states, 5054 states have (on average 4.50415512465374) internal successors, (22764), 5054 states have internal predecessors, (22764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:16,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5055 states to 5055 states and 22764 transitions. [2021-06-05 15:06:16,327 INFO L78 Accepts]: Start accepts. Automaton has 5055 states and 22764 transitions. Word has length 30 [2021-06-05 15:06:16,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:16,327 INFO L482 AbstractCegarLoop]: Abstraction has 5055 states and 22764 transitions. [2021-06-05 15:06:16,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand 5055 states and 22764 transitions. [2021-06-05 15:06:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:16,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:16,335 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:16,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 15:06:16,536 INFO L430 AbstractCegarLoop]: === Iteration 178 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:16,537 INFO L82 PathProgramCache]: Analyzing trace with hash 609639870, now seen corresponding path program 4 times [2021-06-05 15:06:16,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:16,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4275555] [2021-06-05 15:06:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:16,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:16,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4275555] [2021-06-05 15:06:16,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4275555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:16,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808583907] [2021-06-05 15:06:16,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:16,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:16,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:16,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:16,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:16,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:16,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:16,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:17,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:06:17,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:17,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:17,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:17,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:06:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:17,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808583907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:17,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:17,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:06:17,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773044868] [2021-06-05 15:06:17,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:06:17,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:17,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:06:17,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:06:17,114 INFO L87 Difference]: Start difference. First operand 5055 states and 22764 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:18,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:18,317 INFO L93 Difference]: Finished difference Result 5523 states and 24587 transitions. [2021-06-05 15:06:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:06:18,318 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:18,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:18,330 INFO L225 Difference]: With dead ends: 5523 [2021-06-05 15:06:18,331 INFO L226 Difference]: Without dead ends: 5450 [2021-06-05 15:06:18,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 869.0ms TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:06:18,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2021-06-05 15:06:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 5067. [2021-06-05 15:06:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5066 states have (on average 4.503553099091985) internal successors, (22815), 5066 states have internal predecessors, (22815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 22815 transitions. [2021-06-05 15:06:18,423 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 22815 transitions. Word has length 30 [2021-06-05 15:06:18,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:18,423 INFO L482 AbstractCegarLoop]: Abstraction has 5067 states and 22815 transitions. [2021-06-05 15:06:18,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:18,423 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 22815 transitions. [2021-06-05 15:06:18,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:18,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:18,432 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:18,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-06-05 15:06:18,633 INFO L430 AbstractCegarLoop]: === Iteration 179 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:18,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:18,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2135710948, now seen corresponding path program 5 times [2021-06-05 15:06:18,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:18,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809374186] [2021-06-05 15:06:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:18,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:18,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809374186] [2021-06-05 15:06:18,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809374186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:18,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829186917] [2021-06-05 15:06:18,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:18,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:06:18,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:18,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:18,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:19,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:19,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:19,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:19,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:06:19,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:19,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:19,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:19,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:06:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:19,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829186917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:19,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:19,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:06:19,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778645824] [2021-06-05 15:06:19,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:06:19,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:19,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:06:19,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:06:19,154 INFO L87 Difference]: Start difference. First operand 5067 states and 22815 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:20,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:20,032 INFO L93 Difference]: Finished difference Result 5623 states and 25015 transitions. [2021-06-05 15:06:20,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:06:20,033 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:20,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:20,045 INFO L225 Difference]: With dead ends: 5623 [2021-06-05 15:06:20,045 INFO L226 Difference]: Without dead ends: 5548 [2021-06-05 15:06:20,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 715.1ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:06:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5548 states. [2021-06-05 15:06:20,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5548 to 5058. [2021-06-05 15:06:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5058 states, 5057 states have (on average 4.504053786830136) internal successors, (22777), 5057 states have internal predecessors, (22777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5058 states to 5058 states and 22777 transitions. [2021-06-05 15:06:20,183 INFO L78 Accepts]: Start accepts. Automaton has 5058 states and 22777 transitions. Word has length 30 [2021-06-05 15:06:20,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:20,183 INFO L482 AbstractCegarLoop]: Abstraction has 5058 states and 22777 transitions. [2021-06-05 15:06:20,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:20,183 INFO L276 IsEmpty]: Start isEmpty. Operand 5058 states and 22777 transitions. [2021-06-05 15:06:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:20,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:20,192 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:20,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:20,392 INFO L430 AbstractCegarLoop]: === Iteration 180 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:20,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:20,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1940963420, now seen corresponding path program 6 times [2021-06-05 15:06:20,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:20,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043925186] [2021-06-05 15:06:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:20,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:20,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043925186] [2021-06-05 15:06:20,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043925186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:20,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495315615] [2021-06-05 15:06:20,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:20,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:06:20,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:20,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:20,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:20,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:20,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:20,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:20,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:06:20,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:20,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:20,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:20,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:06:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:20,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495315615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:20,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:20,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:06:20,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17863815] [2021-06-05 15:06:20,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:06:20,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:20,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:06:20,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:06:20,925 INFO L87 Difference]: Start difference. First operand 5058 states and 22777 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:21,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:21,790 INFO L93 Difference]: Finished difference Result 5489 states and 24458 transitions. [2021-06-05 15:06:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:06:21,790 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:21,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:21,802 INFO L225 Difference]: With dead ends: 5489 [2021-06-05 15:06:21,802 INFO L226 Difference]: Without dead ends: 5416 [2021-06-05 15:06:21,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 632.3ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:06:21,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5416 states. [2021-06-05 15:06:21,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5416 to 5064. [2021-06-05 15:06:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5064 states, 5063 states have (on average 4.503456448745803) internal successors, (22801), 5063 states have internal predecessors, (22801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5064 states to 5064 states and 22801 transitions. [2021-06-05 15:06:21,891 INFO L78 Accepts]: Start accepts. Automaton has 5064 states and 22801 transitions. Word has length 30 [2021-06-05 15:06:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:21,891 INFO L482 AbstractCegarLoop]: Abstraction has 5064 states and 22801 transitions. [2021-06-05 15:06:21,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 5064 states and 22801 transitions. [2021-06-05 15:06:21,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:21,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:21,899 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:22,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2021-06-05 15:06:22,100 INFO L430 AbstractCegarLoop]: === Iteration 181 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:22,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1320479354, now seen corresponding path program 7 times [2021-06-05 15:06:22,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:22,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192184818] [2021-06-05 15:06:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:22,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:22,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192184818] [2021-06-05 15:06:22,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192184818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:22,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512684874] [2021-06-05 15:06:22,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:22,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:22,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:22,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:22,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:22,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:22,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:06:22,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:22,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:22,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:22,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:06:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:22,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512684874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:22,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:22,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 15:06:22,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177675889] [2021-06-05 15:06:22,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:06:22,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:22,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:06:22,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:06:22,626 INFO L87 Difference]: Start difference. First operand 5064 states and 22801 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:23,395 INFO L93 Difference]: Finished difference Result 5613 states and 24981 transitions. [2021-06-05 15:06:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:06:23,395 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:23,408 INFO L225 Difference]: With dead ends: 5613 [2021-06-05 15:06:23,408 INFO L226 Difference]: Without dead ends: 5547 [2021-06-05 15:06:23,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 564.2ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:06:23,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5547 states. [2021-06-05 15:06:23,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5547 to 5058. [2021-06-05 15:06:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5058 states, 5057 states have (on average 4.504053786830136) internal successors, (22777), 5057 states have internal predecessors, (22777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:23,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5058 states to 5058 states and 22777 transitions. [2021-06-05 15:06:23,494 INFO L78 Accepts]: Start accepts. Automaton has 5058 states and 22777 transitions. Word has length 30 [2021-06-05 15:06:23,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:23,494 INFO L482 AbstractCegarLoop]: Abstraction has 5058 states and 22777 transitions. [2021-06-05 15:06:23,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 5058 states and 22777 transitions. [2021-06-05 15:06:23,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:23,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:23,502 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:23,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:23,703 INFO L430 AbstractCegarLoop]: === Iteration 182 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:23,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:23,703 INFO L82 PathProgramCache]: Analyzing trace with hash -549216698, now seen corresponding path program 8 times [2021-06-05 15:06:23,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:23,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152473305] [2021-06-05 15:06:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:23,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:23,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152473305] [2021-06-05 15:06:23,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152473305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:23,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411222658] [2021-06-05 15:06:23,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:23,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:23,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:23,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:23,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:24,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:24,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:24,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:24,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:06:24,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:24,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:24,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:24,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:06:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:24,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411222658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:24,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:24,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:06:24,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475659287] [2021-06-05 15:06:24,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:06:24,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:24,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:06:24,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:06:24,225 INFO L87 Difference]: Start difference. First operand 5058 states and 22777 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:25,236 INFO L93 Difference]: Finished difference Result 5635 states and 25057 transitions. [2021-06-05 15:06:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:06:25,236 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:25,249 INFO L225 Difference]: With dead ends: 5635 [2021-06-05 15:06:25,249 INFO L226 Difference]: Without dead ends: 5564 [2021-06-05 15:06:25,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 752.1ms TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:06:25,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-06-05 15:06:25,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 5058. [2021-06-05 15:06:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5058 states, 5057 states have (on average 4.504053786830136) internal successors, (22777), 5057 states have internal predecessors, (22777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:25,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5058 states to 5058 states and 22777 transitions. [2021-06-05 15:06:25,339 INFO L78 Accepts]: Start accepts. Automaton has 5058 states and 22777 transitions. Word has length 30 [2021-06-05 15:06:25,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:25,339 INFO L482 AbstractCegarLoop]: Abstraction has 5058 states and 22777 transitions. [2021-06-05 15:06:25,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:25,339 INFO L276 IsEmpty]: Start isEmpty. Operand 5058 states and 22777 transitions. [2021-06-05 15:06:25,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:25,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:25,348 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:25,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 15:06:25,548 INFO L430 AbstractCegarLoop]: === Iteration 183 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:25,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1185683552, now seen corresponding path program 9 times [2021-06-05 15:06:25,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:25,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688099949] [2021-06-05 15:06:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:25,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:25,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688099949] [2021-06-05 15:06:25,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688099949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:25,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986864722] [2021-06-05 15:06:25,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:25,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:06:25,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:25,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:25,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:25,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:25,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:25,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:25,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:06:25,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:25,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:25,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:25,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:06:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:26,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986864722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:26,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:26,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:06:26,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494754097] [2021-06-05 15:06:26,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:06:26,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:26,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:06:26,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:06:26,047 INFO L87 Difference]: Start difference. First operand 5058 states and 22777 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:27,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:27,017 INFO L93 Difference]: Finished difference Result 5616 states and 24993 transitions. [2021-06-05 15:06:27,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:06:27,018 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:27,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:27,030 INFO L225 Difference]: With dead ends: 5616 [2021-06-05 15:06:27,030 INFO L226 Difference]: Without dead ends: 5552 [2021-06-05 15:06:27,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 674.1ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:06:27,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2021-06-05 15:06:27,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 5056. [2021-06-05 15:06:27,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5056 states, 5055 states have (on average 4.504253214638971) internal successors, (22769), 5055 states have internal predecessors, (22769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:27,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5056 states to 5056 states and 22769 transitions. [2021-06-05 15:06:27,112 INFO L78 Accepts]: Start accepts. Automaton has 5056 states and 22769 transitions. Word has length 30 [2021-06-05 15:06:27,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:27,112 INFO L482 AbstractCegarLoop]: Abstraction has 5056 states and 22769 transitions. [2021-06-05 15:06:27,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 5056 states and 22769 transitions. [2021-06-05 15:06:27,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:27,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:27,120 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:27,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 15:06:27,321 INFO L430 AbstractCegarLoop]: === Iteration 184 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:27,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:27,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2049698712, now seen corresponding path program 3 times [2021-06-05 15:06:27,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:27,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469501864] [2021-06-05 15:06:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:27,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:27,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469501864] [2021-06-05 15:06:27,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469501864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:27,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399447631] [2021-06-05 15:06:27,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:27,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:06:27,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:27,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:06:27,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:27,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:27,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:27,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:27,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 15:06:27,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:27,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:27,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:27,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:93 [2021-06-05 15:06:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:27,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399447631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:27,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:27,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 15:06:27,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527099527] [2021-06-05 15:06:27,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:06:27,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:27,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:06:27,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:06:27,873 INFO L87 Difference]: Start difference. First operand 5056 states and 22769 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:29,011 INFO L93 Difference]: Finished difference Result 6020 states and 26497 transitions. [2021-06-05 15:06:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:06:29,011 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:29,024 INFO L225 Difference]: With dead ends: 6020 [2021-06-05 15:06:29,024 INFO L226 Difference]: Without dead ends: 5878 [2021-06-05 15:06:29,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 853.7ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:06:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2021-06-05 15:06:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 5066. [2021-06-05 15:06:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5066 states, 5065 states have (on average 4.506416584402764) internal successors, (22825), 5065 states have internal predecessors, (22825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5066 states to 5066 states and 22825 transitions. [2021-06-05 15:06:29,114 INFO L78 Accepts]: Start accepts. Automaton has 5066 states and 22825 transitions. Word has length 30 [2021-06-05 15:06:29,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:29,114 INFO L482 AbstractCegarLoop]: Abstraction has 5066 states and 22825 transitions. [2021-06-05 15:06:29,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:29,114 INFO L276 IsEmpty]: Start isEmpty. Operand 5066 states and 22825 transitions. [2021-06-05 15:06:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:29,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:29,122 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:29,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 15:06:29,323 INFO L430 AbstractCegarLoop]: === Iteration 185 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:29,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:29,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1184043260, now seen corresponding path program 10 times [2021-06-05 15:06:29,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:29,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447503029] [2021-06-05 15:06:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:29,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:29,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447503029] [2021-06-05 15:06:29,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447503029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:29,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677773153] [2021-06-05 15:06:29,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:29,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:29,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:29,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:29,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:29,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:29,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:29,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:29,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:06:29,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:29,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:29,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:29,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 15:06:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:29,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677773153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:29,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:29,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:06:29,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362235338] [2021-06-05 15:06:29,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:06:29,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:29,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:06:29,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:06:29,797 INFO L87 Difference]: Start difference. First operand 5066 states and 22825 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:31,060 INFO L93 Difference]: Finished difference Result 5908 states and 26143 transitions. [2021-06-05 15:06:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:06:31,060 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:31,073 INFO L225 Difference]: With dead ends: 5908 [2021-06-05 15:06:31,073 INFO L226 Difference]: Without dead ends: 5844 [2021-06-05 15:06:31,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 809.7ms TimeCoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:06:31,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5844 states. [2021-06-05 15:06:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5844 to 5073. [2021-06-05 15:06:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5073 states, 5072 states have (on average 4.504929022082019) internal successors, (22849), 5072 states have internal predecessors, (22849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5073 states to 5073 states and 22849 transitions. [2021-06-05 15:06:31,164 INFO L78 Accepts]: Start accepts. Automaton has 5073 states and 22849 transitions. Word has length 30 [2021-06-05 15:06:31,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:31,164 INFO L482 AbstractCegarLoop]: Abstraction has 5073 states and 22849 transitions. [2021-06-05 15:06:31,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:31,164 INFO L276 IsEmpty]: Start isEmpty. Operand 5073 states and 22849 transitions. [2021-06-05 15:06:31,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:31,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:31,173 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:31,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-06-05 15:06:31,373 INFO L430 AbstractCegarLoop]: === Iteration 186 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:31,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:31,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1181268604, now seen corresponding path program 11 times [2021-06-05 15:06:31,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:31,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051734581] [2021-06-05 15:06:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:31,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:31,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051734581] [2021-06-05 15:06:31,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051734581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:31,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429533625] [2021-06-05 15:06:31,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:31,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:31,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:31,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:31,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:31,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:31,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:31,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:31,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:06:31,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:31,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:31,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:31,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 15:06:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:32,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429533625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:32,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:32,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:06:32,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703065730] [2021-06-05 15:06:32,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:06:32,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:32,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:06:32,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:06:32,004 INFO L87 Difference]: Start difference. First operand 5073 states and 22849 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:33,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:33,197 INFO L93 Difference]: Finished difference Result 6053 states and 26758 transitions. [2021-06-05 15:06:33,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:06:33,198 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:33,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:33,210 INFO L225 Difference]: With dead ends: 6053 [2021-06-05 15:06:33,210 INFO L226 Difference]: Without dead ends: 5958 [2021-06-05 15:06:33,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 999.9ms TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:06:33,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5958 states. [2021-06-05 15:06:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5958 to 5076. [2021-06-05 15:06:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5076 states, 5075 states have (on average 4.504827586206897) internal successors, (22862), 5075 states have internal predecessors, (22862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 22862 transitions. [2021-06-05 15:06:33,299 INFO L78 Accepts]: Start accepts. Automaton has 5076 states and 22862 transitions. Word has length 30 [2021-06-05 15:06:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:33,300 INFO L482 AbstractCegarLoop]: Abstraction has 5076 states and 22862 transitions. [2021-06-05 15:06:33,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:33,300 INFO L276 IsEmpty]: Start isEmpty. Operand 5076 states and 22862 transitions. [2021-06-05 15:06:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:33,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:33,308 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:33,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-05 15:06:33,508 INFO L430 AbstractCegarLoop]: === Iteration 187 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:33,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1687614870, now seen corresponding path program 12 times [2021-06-05 15:06:33,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:33,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455685776] [2021-06-05 15:06:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:33,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:33,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455685776] [2021-06-05 15:06:33,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455685776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:33,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836344247] [2021-06-05 15:06:33,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:33,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:06:33,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:33,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:33,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:33,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:33,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:33,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:33,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:33,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 15:06:34,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:06:34,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:34,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:34,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:53 [2021-06-05 15:06:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:34,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836344247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:34,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:34,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:06:34,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104884496] [2021-06-05 15:06:34,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:06:34,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:34,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:06:34,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:34,157 INFO L87 Difference]: Start difference. First operand 5076 states and 22862 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:36,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:36,261 INFO L93 Difference]: Finished difference Result 5808 states and 25580 transitions. [2021-06-05 15:06:36,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:06:36,261 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:36,274 INFO L225 Difference]: With dead ends: 5808 [2021-06-05 15:06:36,274 INFO L226 Difference]: Without dead ends: 5676 [2021-06-05 15:06:36,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1650.0ms TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:06:36,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-06-05 15:06:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 5067. [2021-06-05 15:06:36,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5066 states have (on average 4.506514015001974) internal successors, (22830), 5066 states have internal predecessors, (22830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 22830 transitions. [2021-06-05 15:06:36,364 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 22830 transitions. Word has length 30 [2021-06-05 15:06:36,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:36,364 INFO L482 AbstractCegarLoop]: Abstraction has 5067 states and 22830 transitions. [2021-06-05 15:06:36,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:36,364 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 22830 transitions. [2021-06-05 15:06:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:36,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:36,372 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:36,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 15:06:36,573 INFO L430 AbstractCegarLoop]: === Iteration 188 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:36,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:36,573 INFO L82 PathProgramCache]: Analyzing trace with hash -945719780, now seen corresponding path program 13 times [2021-06-05 15:06:36,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:36,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87210121] [2021-06-05 15:06:36,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:36,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:36,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87210121] [2021-06-05 15:06:36,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87210121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:36,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309084116] [2021-06-05 15:06:36,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:36,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:36,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:06:36,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:36,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:36,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:36,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:06:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:36,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309084116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:36,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:36,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:06:36,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935803581] [2021-06-05 15:06:36,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:06:36,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:36,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:06:36,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:06:36,905 INFO L87 Difference]: Start difference. First operand 5067 states and 22830 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:38,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:38,390 INFO L93 Difference]: Finished difference Result 6269 states and 27713 transitions. [2021-06-05 15:06:38,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:06:38,390 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:38,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:38,405 INFO L225 Difference]: With dead ends: 6269 [2021-06-05 15:06:38,405 INFO L226 Difference]: Without dead ends: 6196 [2021-06-05 15:06:38,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1062.4ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:06:38,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6196 states. [2021-06-05 15:06:38,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6196 to 5088. [2021-06-05 15:06:38,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 4.50560251621781) internal successors, (22920), 5087 states have internal predecessors, (22920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:38,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 22920 transitions. [2021-06-05 15:06:38,492 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 22920 transitions. Word has length 30 [2021-06-05 15:06:38,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:38,492 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 22920 transitions. [2021-06-05 15:06:38,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:38,493 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 22920 transitions. [2021-06-05 15:06:38,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:38,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:38,501 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:38,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:38,702 INFO L430 AbstractCegarLoop]: === Iteration 189 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:38,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:38,702 INFO L82 PathProgramCache]: Analyzing trace with hash 580351298, now seen corresponding path program 14 times [2021-06-05 15:06:38,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:38,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989747618] [2021-06-05 15:06:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:38,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:38,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989747618] [2021-06-05 15:06:38,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989747618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:38,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182743529] [2021-06-05 15:06:38,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:38,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:38,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:38,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:38,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:38,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:06:38,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:38,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:38,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:38,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:06:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:39,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182743529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:39,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:39,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:06:39,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553520656] [2021-06-05 15:06:39,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:06:39,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:39,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:06:39,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:06:39,018 INFO L87 Difference]: Start difference. First operand 5088 states and 22920 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:40,312 INFO L93 Difference]: Finished difference Result 6262 states and 27736 transitions. [2021-06-05 15:06:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:06:40,312 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:40,325 INFO L225 Difference]: With dead ends: 6262 [2021-06-05 15:06:40,326 INFO L226 Difference]: Without dead ends: 6187 [2021-06-05 15:06:40,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 863.3ms TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:06:40,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6187 states. [2021-06-05 15:06:40,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6187 to 5079. [2021-06-05 15:06:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5079 states, 5078 states have (on average 4.50610476565577) internal successors, (22882), 5078 states have internal predecessors, (22882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5079 states to 5079 states and 22882 transitions. [2021-06-05 15:06:40,411 INFO L78 Accepts]: Start accepts. Automaton has 5079 states and 22882 transitions. Word has length 30 [2021-06-05 15:06:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:40,411 INFO L482 AbstractCegarLoop]: Abstraction has 5079 states and 22882 transitions. [2021-06-05 15:06:40,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 5079 states and 22882 transitions. [2021-06-05 15:06:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:40,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:40,420 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:40,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:40,620 INFO L430 AbstractCegarLoop]: === Iteration 190 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:40,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:40,621 INFO L82 PathProgramCache]: Analyzing trace with hash 343267964, now seen corresponding path program 1 times [2021-06-05 15:06:40,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:40,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294318470] [2021-06-05 15:06:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:40,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:40,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294318470] [2021-06-05 15:06:40,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294318470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:40,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343924747] [2021-06-05 15:06:40,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:40,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:40,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:40,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:06:40,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:40,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:40,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:40,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:06:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:40,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343924747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:40,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:40,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:06:40,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570137415] [2021-06-05 15:06:40,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:06:40,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:40,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:06:40,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:06:40,981 INFO L87 Difference]: Start difference. First operand 5079 states and 22882 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:42,249 INFO L93 Difference]: Finished difference Result 6489 states and 28602 transitions. [2021-06-05 15:06:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:06:42,249 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:42,263 INFO L225 Difference]: With dead ends: 6489 [2021-06-05 15:06:42,263 INFO L226 Difference]: Without dead ends: 6407 [2021-06-05 15:06:42,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 904.4ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:06:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6407 states. [2021-06-05 15:06:42,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6407 to 5089. [2021-06-05 15:06:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5089 states, 5088 states have (on average 4.505699685534591) internal successors, (22925), 5088 states have internal predecessors, (22925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:42,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5089 states to 5089 states and 22925 transitions. [2021-06-05 15:06:42,350 INFO L78 Accepts]: Start accepts. Automaton has 5089 states and 22925 transitions. Word has length 30 [2021-06-05 15:06:42,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:42,350 INFO L482 AbstractCegarLoop]: Abstraction has 5089 states and 22925 transitions. [2021-06-05 15:06:42,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:42,350 INFO L276 IsEmpty]: Start isEmpty. Operand 5089 states and 22925 transitions. [2021-06-05 15:06:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:42,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:42,359 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:42,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:42,559 INFO L430 AbstractCegarLoop]: === Iteration 191 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:42,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:42,559 INFO L82 PathProgramCache]: Analyzing trace with hash 963752030, now seen corresponding path program 2 times [2021-06-05 15:06:42,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:42,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679754077] [2021-06-05 15:06:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:42,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:42,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679754077] [2021-06-05 15:06:42,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679754077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:42,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143070188] [2021-06-05 15:06:42,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:42,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:42,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:42,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:06:42,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:42,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:42,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:06:42,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:42,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:42,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:42,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:06:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:43,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143070188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:43,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:43,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:06:43,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249354470] [2021-06-05 15:06:43,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:43,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:43,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:43,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:43,033 INFO L87 Difference]: Start difference. First operand 5089 states and 22925 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:44,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:44,831 INFO L93 Difference]: Finished difference Result 6703 states and 29403 transitions. [2021-06-05 15:06:44,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:06:44,832 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:44,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:44,846 INFO L225 Difference]: With dead ends: 6703 [2021-06-05 15:06:44,846 INFO L226 Difference]: Without dead ends: 6564 [2021-06-05 15:06:44,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1283.7ms TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:06:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6564 states. [2021-06-05 15:06:44,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6564 to 5081. [2021-06-05 15:06:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5081 states, 5080 states have (on average 4.506496062992126) internal successors, (22893), 5080 states have internal predecessors, (22893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5081 states to 5081 states and 22893 transitions. [2021-06-05 15:06:44,932 INFO L78 Accepts]: Start accepts. Automaton has 5081 states and 22893 transitions. Word has length 30 [2021-06-05 15:06:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:44,932 INFO L482 AbstractCegarLoop]: Abstraction has 5081 states and 22893 transitions. [2021-06-05 15:06:44,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 5081 states and 22893 transitions. [2021-06-05 15:06:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:44,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:44,941 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:45,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:45,145 INFO L430 AbstractCegarLoop]: === Iteration 192 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:45,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:45,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1835829920, now seen corresponding path program 15 times [2021-06-05 15:06:45,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:45,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515315524] [2021-06-05 15:06:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:45,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:45,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515315524] [2021-06-05 15:06:45,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515315524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:45,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886502234] [2021-06-05 15:06:45,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:45,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:06:45,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:45,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:06:45,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:45,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:45,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:06:45,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:45,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:45,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:45,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:06:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:45,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886502234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:45,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:45,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:06:45,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662522374] [2021-06-05 15:06:45,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:45,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:45,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:45,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:45,544 INFO L87 Difference]: Start difference. First operand 5081 states and 22893 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:47,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:47,622 INFO L93 Difference]: Finished difference Result 6749 states and 29410 transitions. [2021-06-05 15:06:47,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:06:47,622 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:47,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:47,637 INFO L225 Difference]: With dead ends: 6749 [2021-06-05 15:06:47,637 INFO L226 Difference]: Without dead ends: 6510 [2021-06-05 15:06:47,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1529.6ms TimeCoverageRelationStatistics Valid=456, Invalid=2514, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:06:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6510 states. [2021-06-05 15:06:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6510 to 5094. [2021-06-05 15:06:47,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 5093 states have (on average 4.505792263891616) internal successors, (22948), 5093 states have internal predecessors, (22948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 22948 transitions. [2021-06-05 15:06:47,731 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 22948 transitions. Word has length 30 [2021-06-05 15:06:47,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:47,731 INFO L482 AbstractCegarLoop]: Abstraction has 5094 states and 22948 transitions. [2021-06-05 15:06:47,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:47,731 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 22948 transitions. [2021-06-05 15:06:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:47,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:47,740 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:47,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-06-05 15:06:47,945 INFO L430 AbstractCegarLoop]: === Iteration 193 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:47,945 INFO L82 PathProgramCache]: Analyzing trace with hash -970174468, now seen corresponding path program 3 times [2021-06-05 15:06:47,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:47,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924903317] [2021-06-05 15:06:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:48,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:48,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924903317] [2021-06-05 15:06:48,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924903317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:48,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887758285] [2021-06-05 15:06:48,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:48,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:06:48,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:48,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:06:48,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:48,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:48,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:06:48,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:48,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:48,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:48,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:06:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:48,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887758285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:48,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:48,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:06:48,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132271631] [2021-06-05 15:06:48,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:06:48,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:48,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:06:48,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:48,385 INFO L87 Difference]: Start difference. First operand 5094 states and 22948 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:50,678 INFO L93 Difference]: Finished difference Result 7021 states and 30443 transitions. [2021-06-05 15:06:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:06:50,678 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:50,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:50,694 INFO L225 Difference]: With dead ends: 7021 [2021-06-05 15:06:50,694 INFO L226 Difference]: Without dead ends: 6790 [2021-06-05 15:06:50,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1667.9ms TimeCoverageRelationStatistics Valid=511, Invalid=2681, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:06:50,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6790 states. [2021-06-05 15:06:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6790 to 5085. [2021-06-05 15:06:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5085 states, 5084 states have (on average 4.507277734067663) internal successors, (22915), 5084 states have internal predecessors, (22915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:50,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5085 states to 5085 states and 22915 transitions. [2021-06-05 15:06:50,789 INFO L78 Accepts]: Start accepts. Automaton has 5085 states and 22915 transitions. Word has length 30 [2021-06-05 15:06:50,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:50,789 INFO L482 AbstractCegarLoop]: Abstraction has 5085 states and 22915 transitions. [2021-06-05 15:06:50,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 5085 states and 22915 transitions. [2021-06-05 15:06:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:50,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:50,798 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:50,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 15:06:50,999 INFO L430 AbstractCegarLoop]: === Iteration 194 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:50,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:50,999 INFO L82 PathProgramCache]: Analyzing trace with hash -686924456, now seen corresponding path program 16 times [2021-06-05 15:06:50,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:50,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12853946] [2021-06-05 15:06:50,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:51,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:51,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12853946] [2021-06-05 15:06:51,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12853946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:51,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351510067] [2021-06-05 15:06:51,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:51,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:51,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:51,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:51,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:51,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:06:51,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:51,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:51,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:51,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:06:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:51,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351510067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:51,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:51,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:06:51,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322716295] [2021-06-05 15:06:51,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:06:51,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:51,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:06:51,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:06:51,328 INFO L87 Difference]: Start difference. First operand 5085 states and 22915 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:52,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:52,480 INFO L93 Difference]: Finished difference Result 6255 states and 27671 transitions. [2021-06-05 15:06:52,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:06:52,480 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:52,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:52,494 INFO L225 Difference]: With dead ends: 6255 [2021-06-05 15:06:52,494 INFO L226 Difference]: Without dead ends: 6182 [2021-06-05 15:06:52,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 827.8ms TimeCoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:06:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6182 states. [2021-06-05 15:06:52,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6182 to 5097. [2021-06-05 15:06:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5097 states, 5096 states have (on average 4.506671899529042) internal successors, (22966), 5096 states have internal predecessors, (22966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5097 states to 5097 states and 22966 transitions. [2021-06-05 15:06:52,586 INFO L78 Accepts]: Start accepts. Automaton has 5097 states and 22966 transitions. Word has length 30 [2021-06-05 15:06:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:52,586 INFO L482 AbstractCegarLoop]: Abstraction has 5097 states and 22966 transitions. [2021-06-05 15:06:52,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 5097 states and 22966 transitions. [2021-06-05 15:06:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:52,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:52,596 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:52,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-05 15:06:52,796 INFO L430 AbstractCegarLoop]: === Iteration 195 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:52,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:52,796 INFO L82 PathProgramCache]: Analyzing trace with hash 839146622, now seen corresponding path program 17 times [2021-06-05 15:06:52,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:52,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066470476] [2021-06-05 15:06:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:52,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:52,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066470476] [2021-06-05 15:06:52,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066470476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:52,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768231626] [2021-06-05 15:06:52,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:52,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:52,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:52,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:52,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:53,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:06:53,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:53,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:53,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:53,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:06:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:53,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768231626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:53,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:53,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:06:53,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877332803] [2021-06-05 15:06:53,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:06:53,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:53,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:06:53,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:06:53,120 INFO L87 Difference]: Start difference. First operand 5097 states and 22966 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:54,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:54,228 INFO L93 Difference]: Finished difference Result 6270 states and 27778 transitions. [2021-06-05 15:06:54,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:06:54,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:54,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:54,242 INFO L225 Difference]: With dead ends: 6270 [2021-06-05 15:06:54,243 INFO L226 Difference]: Without dead ends: 6195 [2021-06-05 15:06:54,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 749.8ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:06:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6195 states. [2021-06-05 15:06:54,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6195 to 5088. [2021-06-05 15:06:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 4.5071751523491255) internal successors, (22928), 5087 states have internal predecessors, (22928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:54,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 22928 transitions. [2021-06-05 15:06:54,334 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 22928 transitions. Word has length 30 [2021-06-05 15:06:54,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:54,334 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 22928 transitions. [2021-06-05 15:06:54,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:54,334 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 22928 transitions. [2021-06-05 15:06:54,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:54,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:54,343 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:54,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:54,543 INFO L430 AbstractCegarLoop]: === Iteration 196 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:54,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1057439550, now seen corresponding path program 18 times [2021-06-05 15:06:54,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:54,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663610476] [2021-06-05 15:06:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:54,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:54,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663610476] [2021-06-05 15:06:54,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663610476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:54,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298039313] [2021-06-05 15:06:54,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:54,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:06:54,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:54,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:06:54,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:54,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:54,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:54,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:54,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:54,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 15:06:54,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:54,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:54,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:54,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:91 [2021-06-05 15:06:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:55,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298039313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:55,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:55,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 15:06:55,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907180453] [2021-06-05 15:06:55,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:55,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:55,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:55,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:55,001 INFO L87 Difference]: Start difference. First operand 5088 states and 22928 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:56,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:56,971 INFO L93 Difference]: Finished difference Result 6315 states and 27840 transitions. [2021-06-05 15:06:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:06:56,971 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:56,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:56,986 INFO L225 Difference]: With dead ends: 6315 [2021-06-05 15:06:56,987 INFO L226 Difference]: Without dead ends: 6226 [2021-06-05 15:06:56,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1476.9ms TimeCoverageRelationStatistics Valid=444, Invalid=2636, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:06:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6226 states. [2021-06-05 15:06:57,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6226 to 5100. [2021-06-05 15:06:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5100 states, 5099 states have (on average 4.506177681898412) internal successors, (22977), 5099 states have internal predecessors, (22977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5100 states to 5100 states and 22977 transitions. [2021-06-05 15:06:57,079 INFO L78 Accepts]: Start accepts. Automaton has 5100 states and 22977 transitions. Word has length 30 [2021-06-05 15:06:57,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:57,080 INFO L482 AbstractCegarLoop]: Abstraction has 5100 states and 22977 transitions. [2021-06-05 15:06:57,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:57,080 INFO L276 IsEmpty]: Start isEmpty. Operand 5100 states and 22977 transitions. [2021-06-05 15:06:57,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:57,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:57,088 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:57,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:57,289 INFO L430 AbstractCegarLoop]: === Iteration 197 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:57,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1982402336, now seen corresponding path program 19 times [2021-06-05 15:06:57,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:57,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379731743] [2021-06-05 15:06:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:57,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:57,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379731743] [2021-06-05 15:06:57,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379731743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:57,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13459527] [2021-06-05 15:06:57,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:57,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:57,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:06:57,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:57,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:57,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:57,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:06:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:57,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13459527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:57,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:57,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:06:57,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459268355] [2021-06-05 15:06:57,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:06:57,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:57,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:06:57,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:06:57,661 INFO L87 Difference]: Start difference. First operand 5100 states and 22977 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:58,920 INFO L93 Difference]: Finished difference Result 6309 states and 27873 transitions. [2021-06-05 15:06:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:06:58,920 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:06:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:58,935 INFO L225 Difference]: With dead ends: 6309 [2021-06-05 15:06:58,935 INFO L226 Difference]: Without dead ends: 6250 [2021-06-05 15:06:58,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 916.2ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:06:58,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6250 states. [2021-06-05 15:06:59,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6250 to 5094. [2021-06-05 15:06:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 5093 states have (on average 4.506577655605733) internal successors, (22952), 5093 states have internal predecessors, (22952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 22952 transitions. [2021-06-05 15:06:59,028 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 22952 transitions. Word has length 30 [2021-06-05 15:06:59,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:59,028 INFO L482 AbstractCegarLoop]: Abstraction has 5094 states and 22952 transitions. [2021-06-05 15:06:59,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:59,029 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 22952 transitions. [2021-06-05 15:06:59,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:06:59,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:59,037 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:59,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 15:06:59,238 INFO L430 AbstractCegarLoop]: === Iteration 198 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:59,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:59,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1677923616, now seen corresponding path program 20 times [2021-06-05 15:06:59,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:59,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252253237] [2021-06-05 15:06:59,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:59,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:59,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252253237] [2021-06-05 15:06:59,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252253237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:59,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406365524] [2021-06-05 15:06:59,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:59,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:59,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:59,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:06:59,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:59,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:59,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:06:59,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:59,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:59,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:59,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:06:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:59,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406365524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:59,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:59,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:06:59,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57906553] [2021-06-05 15:06:59,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:59,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:59,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:59,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:59,683 INFO L87 Difference]: Start difference. First operand 5094 states and 22952 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:01,321 INFO L93 Difference]: Finished difference Result 6474 states and 28453 transitions. [2021-06-05 15:07:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:07:01,321 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:01,337 INFO L225 Difference]: With dead ends: 6474 [2021-06-05 15:07:01,337 INFO L226 Difference]: Without dead ends: 6351 [2021-06-05 15:07:01,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1129.9ms TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:07:01,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-06-05 15:07:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 5088. [2021-06-05 15:07:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 4.5071751523491255) internal successors, (22928), 5087 states have internal predecessors, (22928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:01,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 22928 transitions. [2021-06-05 15:07:01,431 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 22928 transitions. Word has length 30 [2021-06-05 15:07:01,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:01,431 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 22928 transitions. [2021-06-05 15:07:01,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 22928 transitions. [2021-06-05 15:07:01,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:01,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:01,440 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:01,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:01,640 INFO L430 AbstractCegarLoop]: === Iteration 199 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:01,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1845781024, now seen corresponding path program 21 times [2021-06-05 15:07:01,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:01,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354739486] [2021-06-05 15:07:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:01,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:01,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354739486] [2021-06-05 15:07:01,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354739486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:01,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698595833] [2021-06-05 15:07:01,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:01,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:07:01,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:01,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:07:01,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:02,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:02,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:07:02,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:02,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:02,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:02,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:07:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:02,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698595833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:02,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:02,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:07:02,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131282197] [2021-06-05 15:07:02,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:02,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:02,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:02,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:02,152 INFO L87 Difference]: Start difference. First operand 5088 states and 22928 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:03,784 INFO L93 Difference]: Finished difference Result 6454 states and 28376 transitions. [2021-06-05 15:07:03,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:07:03,784 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:03,800 INFO L225 Difference]: With dead ends: 6454 [2021-06-05 15:07:03,801 INFO L226 Difference]: Without dead ends: 6312 [2021-06-05 15:07:03,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1235.1ms TimeCoverageRelationStatistics Valid=397, Invalid=1765, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:07:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6312 states. [2021-06-05 15:07:03,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6312 to 5088. [2021-06-05 15:07:03,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 4.5071751523491255) internal successors, (22928), 5087 states have internal predecessors, (22928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:03,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 22928 transitions. [2021-06-05 15:07:03,894 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 22928 transitions. Word has length 30 [2021-06-05 15:07:03,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:03,894 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 22928 transitions. [2021-06-05 15:07:03,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:03,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 22928 transitions. [2021-06-05 15:07:03,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:03,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:03,902 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:04,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 15:07:04,103 INFO L430 AbstractCegarLoop]: === Iteration 200 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:04,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1812719418, now seen corresponding path program 22 times [2021-06-05 15:07:04,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:04,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759493254] [2021-06-05 15:07:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:04,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:04,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759493254] [2021-06-05 15:07:04,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759493254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:04,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226877515] [2021-06-05 15:07:04,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:04,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:04,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:04,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:04,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:04,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:04,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:04,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:04,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:04,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:07:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:04,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226877515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:04,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:04,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:07:04,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617153962] [2021-06-05 15:07:04,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:04,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:04,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:04,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:04,500 INFO L87 Difference]: Start difference. First operand 5088 states and 22928 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:05,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:05,522 INFO L93 Difference]: Finished difference Result 6446 states and 28454 transitions. [2021-06-05 15:07:05,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:07:05,522 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:05,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:05,538 INFO L225 Difference]: With dead ends: 6446 [2021-06-05 15:07:05,538 INFO L226 Difference]: Without dead ends: 6382 [2021-06-05 15:07:05,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 730.2ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:07:05,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6382 states. [2021-06-05 15:07:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6382 to 5085. [2021-06-05 15:07:05,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5085 states, 5084 states have (on average 4.507277734067663) internal successors, (22915), 5084 states have internal predecessors, (22915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:05,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5085 states to 5085 states and 22915 transitions. [2021-06-05 15:07:05,670 INFO L78 Accepts]: Start accepts. Automaton has 5085 states and 22915 transitions. Word has length 30 [2021-06-05 15:07:05,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:05,670 INFO L482 AbstractCegarLoop]: Abstraction has 5085 states and 22915 transitions. [2021-06-05 15:07:05,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:05,670 INFO L276 IsEmpty]: Start isEmpty. Operand 5085 states and 22915 transitions. [2021-06-05 15:07:05,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:05,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:05,679 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:05,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:05,879 INFO L430 AbstractCegarLoop]: === Iteration 201 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:05,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:05,880 INFO L82 PathProgramCache]: Analyzing trace with hash -2042348638, now seen corresponding path program 23 times [2021-06-05 15:07:05,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:05,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752862993] [2021-06-05 15:07:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:06,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:06,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752862993] [2021-06-05 15:07:06,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752862993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:06,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717516658] [2021-06-05 15:07:06,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:06,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:07:06,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:06,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:06,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:06,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:06,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:06,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:07:06,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:07:06,249 INFO L628 ElimStorePlain]: treesize reduction 55, result has 28.6 percent of original size [2021-06-05 15:07:06,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:06,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 15:07:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:06,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717516658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:06,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:06,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:07:06,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398477660] [2021-06-05 15:07:06,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:06,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:06,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:06,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:06,350 INFO L87 Difference]: Start difference. First operand 5085 states and 22915 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:08,517 INFO L93 Difference]: Finished difference Result 6719 states and 29351 transitions. [2021-06-05 15:07:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:07:08,518 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:08,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:08,533 INFO L225 Difference]: With dead ends: 6719 [2021-06-05 15:07:08,533 INFO L226 Difference]: Without dead ends: 6480 [2021-06-05 15:07:08,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1473.2ms TimeCoverageRelationStatistics Valid=404, Invalid=2676, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:07:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2021-06-05 15:07:08,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 5122. [2021-06-05 15:07:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5122 states, 5121 states have (on average 4.504588947471197) internal successors, (23068), 5121 states have internal predecessors, (23068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:08,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5122 states to 5122 states and 23068 transitions. [2021-06-05 15:07:08,630 INFO L78 Accepts]: Start accepts. Automaton has 5122 states and 23068 transitions. Word has length 30 [2021-06-05 15:07:08,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:08,630 INFO L482 AbstractCegarLoop]: Abstraction has 5122 states and 23068 transitions. [2021-06-05 15:07:08,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:08,630 INFO L276 IsEmpty]: Start isEmpty. Operand 5122 states and 23068 transitions. [2021-06-05 15:07:08,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:08,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:08,638 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:08,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:08,839 INFO L430 AbstractCegarLoop]: === Iteration 202 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:08,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1176693186, now seen corresponding path program 4 times [2021-06-05 15:07:08,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:08,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895951429] [2021-06-05 15:07:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:09,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:09,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895951429] [2021-06-05 15:07:09,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895951429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:09,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018353403] [2021-06-05 15:07:09,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:09,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:09,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:09,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:09,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:09,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:07:09,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:09,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:09,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:09,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:07:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:09,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018353403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:09,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:09,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:07:09,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511774719] [2021-06-05 15:07:09,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:09,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:09,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:09,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:09,309 INFO L87 Difference]: Start difference. First operand 5122 states and 23068 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:10,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:10,756 INFO L93 Difference]: Finished difference Result 6920 states and 30296 transitions. [2021-06-05 15:07:10,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:07:10,757 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:10,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:10,772 INFO L225 Difference]: With dead ends: 6920 [2021-06-05 15:07:10,772 INFO L226 Difference]: Without dead ends: 6768 [2021-06-05 15:07:10,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1053.0ms TimeCoverageRelationStatistics Valid=310, Invalid=1670, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:07:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2021-06-05 15:07:10,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 5109. [2021-06-05 15:07:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5109 states, 5108 states have (on average 4.505285826155051) internal successors, (23013), 5108 states have internal predecessors, (23013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:10,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5109 states to 5109 states and 23013 transitions. [2021-06-05 15:07:10,879 INFO L78 Accepts]: Start accepts. Automaton has 5109 states and 23013 transitions. Word has length 30 [2021-06-05 15:07:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:10,879 INFO L482 AbstractCegarLoop]: Abstraction has 5109 states and 23013 transitions. [2021-06-05 15:07:10,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:10,879 INFO L276 IsEmpty]: Start isEmpty. Operand 5109 states and 23013 transitions. [2021-06-05 15:07:10,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:10,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:10,887 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:11,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 15:07:11,088 INFO L430 AbstractCegarLoop]: === Iteration 203 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:11,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:11,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1983872230, now seen corresponding path program 24 times [2021-06-05 15:07:11,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:11,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941852158] [2021-06-05 15:07:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:11,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:11,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941852158] [2021-06-05 15:07:11,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941852158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:11,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471805007] [2021-06-05 15:07:11,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:11,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:07:11,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:11,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:07:11,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:11,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:11,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:11,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:11,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2021-06-05 15:07:11,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:11,504 INFO L628 ElimStorePlain]: treesize reduction 29, result has 58.6 percent of original size [2021-06-05 15:07:11,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:11,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:42, output treesize:42 [2021-06-05 15:07:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:11,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471805007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:11,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:11,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:07:11,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969501709] [2021-06-05 15:07:11,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:11,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:11,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:11,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:11,607 INFO L87 Difference]: Start difference. First operand 5109 states and 23013 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:13,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:13,429 INFO L93 Difference]: Finished difference Result 6523 states and 28640 transitions. [2021-06-05 15:07:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:07:13,430 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:13,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:13,445 INFO L225 Difference]: With dead ends: 6523 [2021-06-05 15:07:13,445 INFO L226 Difference]: Without dead ends: 6369 [2021-06-05 15:07:13,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1316.8ms TimeCoverageRelationStatistics Valid=461, Invalid=2295, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:07:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6369 states. [2021-06-05 15:07:13,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6369 to 5109. [2021-06-05 15:07:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5109 states, 5108 states have (on average 4.505285826155051) internal successors, (23013), 5108 states have internal predecessors, (23013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5109 states to 5109 states and 23013 transitions. [2021-06-05 15:07:13,573 INFO L78 Accepts]: Start accepts. Automaton has 5109 states and 23013 transitions. Word has length 30 [2021-06-05 15:07:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:13,573 INFO L482 AbstractCegarLoop]: Abstraction has 5109 states and 23013 transitions. [2021-06-05 15:07:13,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 5109 states and 23013 transitions. [2021-06-05 15:07:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:13,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:13,582 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:13,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 15:07:13,782 INFO L430 AbstractCegarLoop]: === Iteration 204 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:13,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:13,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1347405376, now seen corresponding path program 25 times [2021-06-05 15:07:13,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:13,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309698287] [2021-06-05 15:07:13,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:13,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:13,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309698287] [2021-06-05 15:07:13,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309698287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:13,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285060514] [2021-06-05 15:07:13,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:13,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:13,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:14,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:07:14,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:14,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:14,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:14,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:07:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:14,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285060514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:14,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:14,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:07:14,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901009652] [2021-06-05 15:07:14,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:14,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:14,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:14,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:14,119 INFO L87 Difference]: Start difference. First operand 5109 states and 23013 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:15,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:15,524 INFO L93 Difference]: Finished difference Result 6580 states and 29015 transitions. [2021-06-05 15:07:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:07:15,525 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:15,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:15,539 INFO L225 Difference]: With dead ends: 6580 [2021-06-05 15:07:15,539 INFO L226 Difference]: Without dead ends: 6500 [2021-06-05 15:07:15,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 914.8ms TimeCoverageRelationStatistics Valid=302, Invalid=1590, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:07:15,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6500 states. [2021-06-05 15:07:15,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6500 to 5089. [2021-06-05 15:07:15,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5089 states, 5088 states have (on average 4.508058176100629) internal successors, (22937), 5088 states have internal predecessors, (22937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5089 states to 5089 states and 22937 transitions. [2021-06-05 15:07:15,631 INFO L78 Accepts]: Start accepts. Automaton has 5089 states and 22937 transitions. Word has length 30 [2021-06-05 15:07:15,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:15,631 INFO L482 AbstractCegarLoop]: Abstraction has 5089 states and 22937 transitions. [2021-06-05 15:07:15,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 5089 states and 22937 transitions. [2021-06-05 15:07:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:15,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:15,640 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:15,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:15,841 INFO L430 AbstractCegarLoop]: === Iteration 205 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:15,841 INFO L82 PathProgramCache]: Analyzing trace with hash 705435170, now seen corresponding path program 4 times [2021-06-05 15:07:15,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:15,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862662355] [2021-06-05 15:07:15,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:15,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:15,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862662355] [2021-06-05 15:07:15,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862662355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:15,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523227844] [2021-06-05 15:07:15,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:15,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:15,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:15,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:15,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:16,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:16,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:16,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:16,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:07:16,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:16,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:16,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:16,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 15:07:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:16,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523227844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:16,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:16,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 15:07:16,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769848075] [2021-06-05 15:07:16,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:07:16,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:16,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:07:16,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:07:16,217 INFO L87 Difference]: Start difference. First operand 5089 states and 22937 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:16,908 INFO L93 Difference]: Finished difference Result 5843 states and 25905 transitions. [2021-06-05 15:07:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:07:16,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:16,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:16,920 INFO L225 Difference]: With dead ends: 5843 [2021-06-05 15:07:16,920 INFO L226 Difference]: Without dead ends: 5772 [2021-06-05 15:07:16,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 395.1ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:16,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2021-06-05 15:07:17,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 5121. [2021-06-05 15:07:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5121 states, 5120 states have (on average 4.5048828125) internal successors, (23065), 5120 states have internal predecessors, (23065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5121 states to 5121 states and 23065 transitions. [2021-06-05 15:07:17,067 INFO L78 Accepts]: Start accepts. Automaton has 5121 states and 23065 transitions. Word has length 30 [2021-06-05 15:07:17,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:17,068 INFO L482 AbstractCegarLoop]: Abstraction has 5121 states and 23065 transitions. [2021-06-05 15:07:17,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:17,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5121 states and 23065 transitions. [2021-06-05 15:07:17,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:17,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:17,077 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:17,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:17,278 INFO L430 AbstractCegarLoop]: === Iteration 206 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:17,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:17,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1571090622, now seen corresponding path program 26 times [2021-06-05 15:07:17,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:17,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375530201] [2021-06-05 15:07:17,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:17,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:17,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375530201] [2021-06-05 15:07:17,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375530201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:17,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539622705] [2021-06-05 15:07:17,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:17,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:17,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:17,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:17,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:17,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:17,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:17,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:17,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:17,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 15:07:17,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:07:17,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:17,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:17,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:50 [2021-06-05 15:07:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:17,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539622705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:17,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:17,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:07:17,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882014696] [2021-06-05 15:07:17,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:17,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:17,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:17,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:17,896 INFO L87 Difference]: Start difference. First operand 5121 states and 23065 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:20,089 INFO L93 Difference]: Finished difference Result 6111 states and 26760 transitions. [2021-06-05 15:07:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:07:20,089 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:20,103 INFO L225 Difference]: With dead ends: 6111 [2021-06-05 15:07:20,103 INFO L226 Difference]: Without dead ends: 5979 [2021-06-05 15:07:20,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1442.6ms TimeCoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:07:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5979 states. [2021-06-05 15:07:20,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5979 to 5135. [2021-06-05 15:07:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5135 states, 5134 states have (on average 4.501947798987144) internal successors, (23113), 5134 states have internal predecessors, (23113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:20,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5135 states to 5135 states and 23113 transitions. [2021-06-05 15:07:20,196 INFO L78 Accepts]: Start accepts. Automaton has 5135 states and 23113 transitions. Word has length 30 [2021-06-05 15:07:20,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:20,196 INFO L482 AbstractCegarLoop]: Abstraction has 5135 states and 23113 transitions. [2021-06-05 15:07:20,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:20,196 INFO L276 IsEmpty]: Start isEmpty. Operand 5135 states and 23113 transitions. [2021-06-05 15:07:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:20,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:20,205 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:20,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable395 [2021-06-05 15:07:20,405 INFO L430 AbstractCegarLoop]: === Iteration 207 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:20,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:20,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1573865278, now seen corresponding path program 27 times [2021-06-05 15:07:20,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:20,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318074198] [2021-06-05 15:07:20,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:20,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:20,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318074198] [2021-06-05 15:07:20,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318074198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:20,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603444032] [2021-06-05 15:07:20,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:20,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:07:20,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:20,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:20,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:20,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:20,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:20,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:21,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:21,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 15:07:21,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:07:21,049 INFO L628 ElimStorePlain]: treesize reduction 33, result has 54.2 percent of original size [2021-06-05 15:07:21,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:21,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:53 [2021-06-05 15:07:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:21,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603444032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:21,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:21,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:07:21,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864916776] [2021-06-05 15:07:21,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:21,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:21,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:21,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:21,282 INFO L87 Difference]: Start difference. First operand 5135 states and 23113 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:23,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:23,260 INFO L93 Difference]: Finished difference Result 6129 states and 26870 transitions. [2021-06-05 15:07:23,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:07:23,260 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:23,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:23,273 INFO L225 Difference]: With dead ends: 6129 [2021-06-05 15:07:23,273 INFO L226 Difference]: Without dead ends: 5971 [2021-06-05 15:07:23,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1655.8ms TimeCoverageRelationStatistics Valid=299, Invalid=1957, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:07:23,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2021-06-05 15:07:23,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 5169. [2021-06-05 15:07:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5169 states, 5168 states have (on average 4.4963235294117645) internal successors, (23237), 5168 states have internal predecessors, (23237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:23,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5169 states to 5169 states and 23237 transitions. [2021-06-05 15:07:23,363 INFO L78 Accepts]: Start accepts. Automaton has 5169 states and 23237 transitions. Word has length 30 [2021-06-05 15:07:23,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:23,363 INFO L482 AbstractCegarLoop]: Abstraction has 5169 states and 23237 transitions. [2021-06-05 15:07:23,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:23,363 INFO L276 IsEmpty]: Start isEmpty. Operand 5169 states and 23237 transitions. [2021-06-05 15:07:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:23,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:23,372 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:23,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 15:07:23,572 INFO L430 AbstractCegarLoop]: === Iteration 208 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:23,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:23,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1067519012, now seen corresponding path program 28 times [2021-06-05 15:07:23,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:23,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766568525] [2021-06-05 15:07:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:23,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:23,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766568525] [2021-06-05 15:07:23,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766568525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:23,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813923708] [2021-06-05 15:07:23,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:23,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:23,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:23,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:23,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:24,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:24,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:24,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:24,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:07:24,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:24,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:24,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:24,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 15:07:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:24,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813923708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:24,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:24,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:07:24,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637148222] [2021-06-05 15:07:24,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:24,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:24,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:24,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:24,087 INFO L87 Difference]: Start difference. First operand 5169 states and 23237 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:25,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:25,025 INFO L93 Difference]: Finished difference Result 6093 states and 26871 transitions. [2021-06-05 15:07:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:07:25,025 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:25,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:25,039 INFO L225 Difference]: With dead ends: 6093 [2021-06-05 15:07:25,039 INFO L226 Difference]: Without dead ends: 6029 [2021-06-05 15:07:25,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 651.6ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:07:25,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2021-06-05 15:07:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 5162. [2021-06-05 15:07:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5162 states, 5161 states have (on average 4.497771749660918) internal successors, (23213), 5161 states have internal predecessors, (23213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 23213 transitions. [2021-06-05 15:07:25,164 INFO L78 Accepts]: Start accepts. Automaton has 5162 states and 23213 transitions. Word has length 30 [2021-06-05 15:07:25,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:25,164 INFO L482 AbstractCegarLoop]: Abstraction has 5162 states and 23213 transitions. [2021-06-05 15:07:25,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:25,165 INFO L276 IsEmpty]: Start isEmpty. Operand 5162 states and 23213 transitions. [2021-06-05 15:07:25,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:25,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:25,174 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:25,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:25,375 INFO L430 AbstractCegarLoop]: === Iteration 209 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:25,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1348670500, now seen corresponding path program 29 times [2021-06-05 15:07:25,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:25,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76187986] [2021-06-05 15:07:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:25,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:25,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76187986] [2021-06-05 15:07:25,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76187986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:25,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390134389] [2021-06-05 15:07:25,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:25,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:07:25,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:25,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:25,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:25,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:25,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:25,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:25,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 45 [2021-06-05 15:07:25,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:07:25,800 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.8 percent of original size [2021-06-05 15:07:25,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:25,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-06-05 15:07:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:25,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390134389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:25,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:25,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 15:07:25,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927855053] [2021-06-05 15:07:25,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:25,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:25,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:25,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:25,877 INFO L87 Difference]: Start difference. First operand 5162 states and 23213 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:27,133 INFO L93 Difference]: Finished difference Result 6788 states and 29674 transitions. [2021-06-05 15:07:27,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:07:27,134 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:27,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:27,148 INFO L225 Difference]: With dead ends: 6788 [2021-06-05 15:07:27,149 INFO L226 Difference]: Without dead ends: 6561 [2021-06-05 15:07:27,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 798.5ms TimeCoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:07:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6561 states. [2021-06-05 15:07:27,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6561 to 5186. [2021-06-05 15:07:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5186 states, 5185 states have (on average 4.494310511089682) internal successors, (23303), 5185 states have internal predecessors, (23303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 23303 transitions. [2021-06-05 15:07:27,252 INFO L78 Accepts]: Start accepts. Automaton has 5186 states and 23303 transitions. Word has length 30 [2021-06-05 15:07:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:27,252 INFO L482 AbstractCegarLoop]: Abstraction has 5186 states and 23303 transitions. [2021-06-05 15:07:27,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 5186 states and 23303 transitions. [2021-06-05 15:07:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:27,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:27,262 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:27,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable405 [2021-06-05 15:07:27,462 INFO L430 AbstractCegarLoop]: === Iteration 210 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:27,462 INFO L82 PathProgramCache]: Analyzing trace with hash 336756796, now seen corresponding path program 5 times [2021-06-05 15:07:27,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:27,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695341280] [2021-06-05 15:07:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:27,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:27,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695341280] [2021-06-05 15:07:27,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695341280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:27,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943613082] [2021-06-05 15:07:27,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:27,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:07:27,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:27,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:27,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:27,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:07:27,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:27,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:27,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:27,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:07:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:27,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943613082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:27,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:27,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:07:27,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391073637] [2021-06-05 15:07:27,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:27,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:27,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:27,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:27,855 INFO L87 Difference]: Start difference. First operand 5186 states and 23303 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:29,139 INFO L93 Difference]: Finished difference Result 6944 states and 30547 transitions. [2021-06-05 15:07:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:07:29,139 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:29,155 INFO L225 Difference]: With dead ends: 6944 [2021-06-05 15:07:29,155 INFO L226 Difference]: Without dead ends: 6873 [2021-06-05 15:07:29,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 827.8ms TimeCoverageRelationStatistics Valid=312, Invalid=1758, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:07:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6873 states. [2021-06-05 15:07:29,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6873 to 5178. [2021-06-05 15:07:29,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 4.495460691520186) internal successors, (23273), 5177 states have internal predecessors, (23273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:29,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 23273 transitions. [2021-06-05 15:07:29,252 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 23273 transitions. Word has length 30 [2021-06-05 15:07:29,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:29,252 INFO L482 AbstractCegarLoop]: Abstraction has 5178 states and 23273 transitions. [2021-06-05 15:07:29,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:29,252 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 23273 transitions. [2021-06-05 15:07:29,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:29,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:29,261 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:29,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:29,462 INFO L430 AbstractCegarLoop]: === Iteration 211 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:29,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:29,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1791569640, now seen corresponding path program 30 times [2021-06-05 15:07:29,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:29,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444265954] [2021-06-05 15:07:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:29,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:29,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444265954] [2021-06-05 15:07:29,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444265954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:29,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202441954] [2021-06-05 15:07:29,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:29,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:07:29,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:29,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:07:29,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:29,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:29,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:29,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:07:29,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:29,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:29,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:29,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-06-05 15:07:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:29,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202441954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:29,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:29,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:07:29,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332744454] [2021-06-05 15:07:29,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:29,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:29,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:29,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:29,972 INFO L87 Difference]: Start difference. First operand 5178 states and 23273 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:31,307 INFO L93 Difference]: Finished difference Result 6471 states and 28525 transitions. [2021-06-05 15:07:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:07:31,307 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:31,322 INFO L225 Difference]: With dead ends: 6471 [2021-06-05 15:07:31,322 INFO L226 Difference]: Without dead ends: 6400 [2021-06-05 15:07:31,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 888.3ms TimeCoverageRelationStatistics Valid=266, Invalid=1456, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:07:31,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6400 states. [2021-06-05 15:07:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6400 to 5178. [2021-06-05 15:07:31,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 4.495460691520186) internal successors, (23273), 5177 states have internal predecessors, (23273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 23273 transitions. [2021-06-05 15:07:31,415 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 23273 transitions. Word has length 30 [2021-06-05 15:07:31,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:31,415 INFO L482 AbstractCegarLoop]: Abstraction has 5178 states and 23273 transitions. [2021-06-05 15:07:31,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:31,415 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 23273 transitions. [2021-06-05 15:07:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:31,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:31,424 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:31,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 15:07:31,624 INFO L430 AbstractCegarLoop]: === Iteration 212 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:31,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:31,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1997051390, now seen corresponding path program 31 times [2021-06-05 15:07:31,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:31,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442214899] [2021-06-05 15:07:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:31,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:31,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442214899] [2021-06-05 15:07:31,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442214899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:31,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37218101] [2021-06-05 15:07:31,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:31,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:31,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:31,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:07:31,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:31,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:31,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:31,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:07:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:31,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37218101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:31,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:31,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:07:31,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744025536] [2021-06-05 15:07:31,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:31,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:31,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:31,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:31,992 INFO L87 Difference]: Start difference. First operand 5178 states and 23273 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:33,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:33,342 INFO L93 Difference]: Finished difference Result 6654 states and 29363 transitions. [2021-06-05 15:07:33,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:07:33,342 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:33,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:33,357 INFO L225 Difference]: With dead ends: 6654 [2021-06-05 15:07:33,357 INFO L226 Difference]: Without dead ends: 6590 [2021-06-05 15:07:33,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 865.1ms TimeCoverageRelationStatistics Valid=331, Invalid=1739, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:07:33,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6590 states. [2021-06-05 15:07:33,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6590 to 5162. [2021-06-05 15:07:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5162 states, 5161 states have (on average 4.497771749660918) internal successors, (23213), 5161 states have internal predecessors, (23213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 23213 transitions. [2021-06-05 15:07:33,454 INFO L78 Accepts]: Start accepts. Automaton has 5162 states and 23213 transitions. Word has length 30 [2021-06-05 15:07:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:33,454 INFO L482 AbstractCegarLoop]: Abstraction has 5162 states and 23213 transitions. [2021-06-05 15:07:33,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 5162 states and 23213 transitions. [2021-06-05 15:07:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:33,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:33,463 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:33,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:33,665 INFO L430 AbstractCegarLoop]: === Iteration 213 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:33,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:33,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1293295150, now seen corresponding path program 57 times [2021-06-05 15:07:33,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:33,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757364992] [2021-06-05 15:07:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:33,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:33,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757364992] [2021-06-05 15:07:33,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757364992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:33,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268827288] [2021-06-05 15:07:33,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:33,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:07:33,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:33,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:07:33,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:34,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:34,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:34,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:34,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 15:07:34,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:07:34,123 INFO L628 ElimStorePlain]: treesize reduction 10, result has 86.3 percent of original size [2021-06-05 15:07:34,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:34,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:102 [2021-06-05 15:07:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:34,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268827288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:34,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:34,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:07:34,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418152511] [2021-06-05 15:07:34,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:34,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:34,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:34,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:34,261 INFO L87 Difference]: Start difference. First operand 5162 states and 23213 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:36,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:36,605 INFO L93 Difference]: Finished difference Result 7528 states and 31735 transitions. [2021-06-05 15:07:36,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:07:36,605 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:36,620 INFO L225 Difference]: With dead ends: 7528 [2021-06-05 15:07:36,620 INFO L226 Difference]: Without dead ends: 7281 [2021-06-05 15:07:36,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1742.5ms TimeCoverageRelationStatistics Valid=375, Invalid=2705, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:07:36,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7281 states. [2021-06-05 15:07:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7281 to 5231. [2021-06-05 15:07:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5231 states, 5230 states have (on average 4.495984703632887) internal successors, (23514), 5230 states have internal predecessors, (23514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5231 states to 5231 states and 23514 transitions. [2021-06-05 15:07:36,759 INFO L78 Accepts]: Start accepts. Automaton has 5231 states and 23514 transitions. Word has length 30 [2021-06-05 15:07:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:36,759 INFO L482 AbstractCegarLoop]: Abstraction has 5231 states and 23514 transitions. [2021-06-05 15:07:36,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:36,759 INFO L276 IsEmpty]: Start isEmpty. Operand 5231 states and 23514 transitions. [2021-06-05 15:07:36,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:36,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:36,769 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:36,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 15:07:36,970 INFO L430 AbstractCegarLoop]: === Iteration 214 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:36,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:36,970 INFO L82 PathProgramCache]: Analyzing trace with hash -2003594308, now seen corresponding path program 5 times [2021-06-05 15:07:36,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:36,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428839526] [2021-06-05 15:07:36,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:37,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:37,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428839526] [2021-06-05 15:07:37,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428839526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:37,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721021069] [2021-06-05 15:07:37,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:37,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:07:37,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:37,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:37,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:37,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:37,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:37,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:37,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 15:07:37,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:37,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:37,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:37,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 15:07:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:37,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721021069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:37,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:37,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 15:07:37,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591913720] [2021-06-05 15:07:37,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:07:37,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:37,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:07:37,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:07:37,335 INFO L87 Difference]: Start difference. First operand 5231 states and 23514 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:37,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:37,968 INFO L93 Difference]: Finished difference Result 6052 states and 26741 transitions. [2021-06-05 15:07:37,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:07:37,969 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:37,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:37,983 INFO L225 Difference]: With dead ends: 6052 [2021-06-05 15:07:37,983 INFO L226 Difference]: Without dead ends: 5862 [2021-06-05 15:07:37,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:37,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5862 states. [2021-06-05 15:07:38,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5862 to 5272. [2021-06-05 15:07:38,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5272 states, 5271 states have (on average 4.48871181938911) internal successors, (23660), 5271 states have internal predecessors, (23660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5272 states to 5272 states and 23660 transitions. [2021-06-05 15:07:38,085 INFO L78 Accepts]: Start accepts. Automaton has 5272 states and 23660 transitions. Word has length 30 [2021-06-05 15:07:38,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:38,085 INFO L482 AbstractCegarLoop]: Abstraction has 5272 states and 23660 transitions. [2021-06-05 15:07:38,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:38,085 INFO L276 IsEmpty]: Start isEmpty. Operand 5272 states and 23660 transitions. [2021-06-05 15:07:38,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:38,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:38,094 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:38,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:38,295 INFO L430 AbstractCegarLoop]: === Iteration 215 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:38,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:38,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2026530574, now seen corresponding path program 58 times [2021-06-05 15:07:38,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:38,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608490580] [2021-06-05 15:07:38,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:38,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:38,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608490580] [2021-06-05 15:07:38,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608490580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:38,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327428644] [2021-06-05 15:07:38,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:38,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:38,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:38,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:38,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:38,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:38,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:38,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:38,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:07:38,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:38,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:38,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:38,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:07:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:38,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327428644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:38,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:38,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:07:38,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985400820] [2021-06-05 15:07:38,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:07:38,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:38,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:07:38,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:07:38,771 INFO L87 Difference]: Start difference. First operand 5272 states and 23660 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:40,189 INFO L93 Difference]: Finished difference Result 6816 states and 29490 transitions. [2021-06-05 15:07:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:07:40,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:40,205 INFO L225 Difference]: With dead ends: 6816 [2021-06-05 15:07:40,206 INFO L226 Difference]: Without dead ends: 6656 [2021-06-05 15:07:40,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 942.6ms TimeCoverageRelationStatistics Valid=265, Invalid=1295, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:07:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2021-06-05 15:07:40,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 5352. [2021-06-05 15:07:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 4.493178845075687) internal successors, (24043), 5351 states have internal predecessors, (24043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 24043 transitions. [2021-06-05 15:07:40,348 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 24043 transitions. Word has length 30 [2021-06-05 15:07:40,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:40,348 INFO L482 AbstractCegarLoop]: Abstraction has 5352 states and 24043 transitions. [2021-06-05 15:07:40,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:40,348 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 24043 transitions. [2021-06-05 15:07:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:40,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:40,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:40,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:40,558 INFO L430 AbstractCegarLoop]: === Iteration 216 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1713004178, now seen corresponding path program 59 times [2021-06-05 15:07:40,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:40,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482269896] [2021-06-05 15:07:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:40,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:40,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482269896] [2021-06-05 15:07:40,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482269896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:40,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744546807] [2021-06-05 15:07:40,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:40,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:07:40,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:40,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:40,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:40,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:40,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:40,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:07:40,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:40,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:40,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:40,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:07:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:40,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744546807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:40,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:40,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:07:40,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577465334] [2021-06-05 15:07:40,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:07:40,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:40,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:07:40,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:07:40,994 INFO L87 Difference]: Start difference. First operand 5352 states and 24043 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:42,410 INFO L93 Difference]: Finished difference Result 6885 states and 29740 transitions. [2021-06-05 15:07:42,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:07:42,410 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:42,427 INFO L225 Difference]: With dead ends: 6885 [2021-06-05 15:07:42,427 INFO L226 Difference]: Without dead ends: 6587 [2021-06-05 15:07:42,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 883.9ms TimeCoverageRelationStatistics Valid=347, Invalid=1633, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:07:42,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6587 states. [2021-06-05 15:07:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6587 to 5359. [2021-06-05 15:07:42,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5359 states, 5358 states have (on average 4.488801791713326) internal successors, (24051), 5358 states have internal predecessors, (24051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5359 states to 5359 states and 24051 transitions. [2021-06-05 15:07:42,539 INFO L78 Accepts]: Start accepts. Automaton has 5359 states and 24051 transitions. Word has length 30 [2021-06-05 15:07:42,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:42,539 INFO L482 AbstractCegarLoop]: Abstraction has 5359 states and 24051 transitions. [2021-06-05 15:07:42,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:42,539 INFO L276 IsEmpty]: Start isEmpty. Operand 5359 states and 24051 transitions. [2021-06-05 15:07:42,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:42,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:42,549 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:42,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 15:07:42,749 INFO L430 AbstractCegarLoop]: === Iteration 217 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:42,750 INFO L82 PathProgramCache]: Analyzing trace with hash 853505080, now seen corresponding path program 6 times [2021-06-05 15:07:42,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:42,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353176333] [2021-06-05 15:07:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:42,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:42,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353176333] [2021-06-05 15:07:42,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353176333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:42,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377368110] [2021-06-05 15:07:42,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:42,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:07:42,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:42,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:07:42,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:43,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:43,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:43,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 60 [2021-06-05 15:07:43,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:43,150 INFO L628 ElimStorePlain]: treesize reduction 5, result has 94.2 percent of original size [2021-06-05 15:07:43,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:43,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:870 [2021-06-05 15:07:43,649 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-05 15:07:43,946 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-06-05 15:07:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:44,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377368110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:44,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:44,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2021-06-05 15:07:44,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861214201] [2021-06-05 15:07:44,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:07:44,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:44,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:07:44,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:07:44,068 INFO L87 Difference]: Start difference. First operand 5359 states and 24051 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:44,543 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-06-05 15:07:46,464 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-05 15:07:46,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:46,649 INFO L93 Difference]: Finished difference Result 6640 states and 29394 transitions. [2021-06-05 15:07:46,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:07:46,649 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:46,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:46,664 INFO L225 Difference]: With dead ends: 6640 [2021-06-05 15:07:46,664 INFO L226 Difference]: Without dead ends: 6403 [2021-06-05 15:07:46,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 2149.6ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:07:46,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6403 states. [2021-06-05 15:07:46,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6403 to 5429. [2021-06-05 15:07:46,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5429 states, 5428 states have (on average 4.5038688282977155) internal successors, (24447), 5428 states have internal predecessors, (24447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5429 states to 5429 states and 24447 transitions. [2021-06-05 15:07:46,775 INFO L78 Accepts]: Start accepts. Automaton has 5429 states and 24447 transitions. Word has length 30 [2021-06-05 15:07:46,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:46,775 INFO L482 AbstractCegarLoop]: Abstraction has 5429 states and 24447 transitions. [2021-06-05 15:07:46,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:46,775 INFO L276 IsEmpty]: Start isEmpty. Operand 5429 states and 24447 transitions. [2021-06-05 15:07:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:46,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:46,785 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:46,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:46,986 INFO L430 AbstractCegarLoop]: === Iteration 218 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:46,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:46,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1927988576, now seen corresponding path program 35 times [2021-06-05 15:07:46,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:46,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142159863] [2021-06-05 15:07:46,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:47,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:47,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142159863] [2021-06-05 15:07:47,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142159863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:47,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814889872] [2021-06-05 15:07:47,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:47,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:07:47,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:47,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:47,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:47,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:47,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:47,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:47,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:07:47,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:47,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:47,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:47,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 15:07:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:47,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814889872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:47,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:47,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:07:47,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788642223] [2021-06-05 15:07:47,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:47,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:47,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:47,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:47,485 INFO L87 Difference]: Start difference. First operand 5429 states and 24447 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:48,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:48,579 INFO L93 Difference]: Finished difference Result 6079 states and 26957 transitions. [2021-06-05 15:07:48,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:07:48,579 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:48,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:48,594 INFO L225 Difference]: With dead ends: 6079 [2021-06-05 15:07:48,594 INFO L226 Difference]: Without dead ends: 5940 [2021-06-05 15:07:48,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 761.5ms TimeCoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:07:48,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5940 states. [2021-06-05 15:07:48,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5940 to 5436. [2021-06-05 15:07:48,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5436 states, 5435 states have (on average 4.50229990800368) internal successors, (24470), 5435 states have internal predecessors, (24470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5436 states to 5436 states and 24470 transitions. [2021-06-05 15:07:48,693 INFO L78 Accepts]: Start accepts. Automaton has 5436 states and 24470 transitions. Word has length 30 [2021-06-05 15:07:48,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:48,693 INFO L482 AbstractCegarLoop]: Abstraction has 5436 states and 24470 transitions. [2021-06-05 15:07:48,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:48,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5436 states and 24470 transitions. [2021-06-05 15:07:48,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:48,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:48,703 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:48,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:48,903 INFO L430 AbstractCegarLoop]: === Iteration 219 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:48,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:48,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1662609756, now seen corresponding path program 36 times [2021-06-05 15:07:48,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:48,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385939202] [2021-06-05 15:07:48,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:49,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:49,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385939202] [2021-06-05 15:07:49,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385939202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:49,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114861599] [2021-06-05 15:07:49,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:49,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:07:49,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:49,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:07:49,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:49,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:49,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 53 [2021-06-05 15:07:49,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:49,388 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.8 percent of original size [2021-06-05 15:07:49,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:49,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:405 [2021-06-05 15:07:49,563 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-06-05 15:07:49,703 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-06-05 15:07:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:49,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114861599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:49,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:49,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:07:49,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623109716] [2021-06-05 15:07:49,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:07:49,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:49,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:07:49,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:07:49,865 INFO L87 Difference]: Start difference. First operand 5436 states and 24470 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:52,163 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 15:07:52,308 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 15:07:52,578 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 15:07:52,753 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-06-05 15:07:52,944 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-06-05 15:07:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:53,634 INFO L93 Difference]: Finished difference Result 6587 states and 28946 transitions. [2021-06-05 15:07:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:07:53,634 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:53,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:53,652 INFO L225 Difference]: With dead ends: 6587 [2021-06-05 15:07:53,652 INFO L226 Difference]: Without dead ends: 6478 [2021-06-05 15:07:53,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 2818.3ms TimeCoverageRelationStatistics Valid=370, Invalid=3412, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:07:53,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6478 states. [2021-06-05 15:07:53,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6478 to 5466. [2021-06-05 15:07:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5466 states, 5465 states have (on average 4.495150960658737) internal successors, (24566), 5465 states have internal predecessors, (24566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 24566 transitions. [2021-06-05 15:07:53,759 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 24566 transitions. Word has length 30 [2021-06-05 15:07:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:53,759 INFO L482 AbstractCegarLoop]: Abstraction has 5466 states and 24566 transitions. [2021-06-05 15:07:53,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:53,759 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 24566 transitions. [2021-06-05 15:07:53,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:53,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:53,769 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:53,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-05 15:07:53,969 INFO L430 AbstractCegarLoop]: === Iteration 220 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:53,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:53,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2099600558, now seen corresponding path program 37 times [2021-06-05 15:07:53,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:53,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615018977] [2021-06-05 15:07:53,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:54,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:54,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615018977] [2021-06-05 15:07:54,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615018977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:54,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438766181] [2021-06-05 15:07:54,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:54,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:54,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:54,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:54,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:54,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:54,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:07:54,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:54,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:54,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:54,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:07:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:54,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438766181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:54,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:54,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 15:07:54,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111137167] [2021-06-05 15:07:54,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:07:54,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:54,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:07:54,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:07:54,428 INFO L87 Difference]: Start difference. First operand 5466 states and 24566 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:55,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:55,514 INFO L93 Difference]: Finished difference Result 6005 states and 26631 transitions. [2021-06-05 15:07:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:07:55,514 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:55,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:55,529 INFO L225 Difference]: With dead ends: 6005 [2021-06-05 15:07:55,529 INFO L226 Difference]: Without dead ends: 5895 [2021-06-05 15:07:55,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 762.8ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:07:55,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5895 states. [2021-06-05 15:07:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5895 to 5482. [2021-06-05 15:07:55,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5482 states, 5481 states have (on average 4.4927932858967345) internal successors, (24625), 5481 states have internal predecessors, (24625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5482 states to 5482 states and 24625 transitions. [2021-06-05 15:07:55,664 INFO L78 Accepts]: Start accepts. Automaton has 5482 states and 24625 transitions. Word has length 30 [2021-06-05 15:07:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:55,664 INFO L482 AbstractCegarLoop]: Abstraction has 5482 states and 24625 transitions. [2021-06-05 15:07:55,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 5482 states and 24625 transitions. [2021-06-05 15:07:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:55,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:55,674 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:55,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 15:07:55,875 INFO L430 AbstractCegarLoop]: === Iteration 221 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:55,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:55,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1063411844, now seen corresponding path program 38 times [2021-06-05 15:07:55,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:55,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93007563] [2021-06-05 15:07:55,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:56,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:56,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93007563] [2021-06-05 15:07:56,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93007563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:56,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108017738] [2021-06-05 15:07:56,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:56,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:56,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:56,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:07:56,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:56,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:56,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:56,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:07:56,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:56,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:56,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:56,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-06-05 15:07:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:56,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108017738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:56,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:56,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:07:56,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171665936] [2021-06-05 15:07:56,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:56,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:56,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:56,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:56,551 INFO L87 Difference]: Start difference. First operand 5482 states and 24625 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:58,234 INFO L93 Difference]: Finished difference Result 6041 states and 26685 transitions. [2021-06-05 15:07:58,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:07:58,235 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:58,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:58,249 INFO L225 Difference]: With dead ends: 6041 [2021-06-05 15:07:58,249 INFO L226 Difference]: Without dead ends: 5846 [2021-06-05 15:07:58,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1422.9ms TimeCoverageRelationStatistics Valid=230, Invalid=1492, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:07:58,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2021-06-05 15:07:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 5466. [2021-06-05 15:07:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5466 states, 5465 states have (on average 4.497712717291857) internal successors, (24580), 5465 states have internal predecessors, (24580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:58,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 24580 transitions. [2021-06-05 15:07:58,348 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 24580 transitions. Word has length 30 [2021-06-05 15:07:58,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:58,349 INFO L482 AbstractCegarLoop]: Abstraction has 5466 states and 24580 transitions. [2021-06-05 15:07:58,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:58,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 24580 transitions. [2021-06-05 15:07:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:58,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:58,359 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:58,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2021-06-05 15:07:58,559 INFO L430 AbstractCegarLoop]: === Iteration 222 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:58,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1581275744, now seen corresponding path program 7 times [2021-06-05 15:07:58,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:58,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678748135] [2021-06-05 15:07:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:58,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:58,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678748135] [2021-06-05 15:07:58,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678748135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:58,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836823081] [2021-06-05 15:07:58,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:58,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:58,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:58,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:58,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:58,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:58,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:07:58,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:58,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:58,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:58,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:07:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:58,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836823081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:58,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:58,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 15:07:58,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009035817] [2021-06-05 15:07:58,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:07:58,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:58,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:07:58,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:07:58,895 INFO L87 Difference]: Start difference. First operand 5466 states and 24580 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:59,447 INFO L93 Difference]: Finished difference Result 5970 states and 26447 transitions. [2021-06-05 15:07:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:07:59,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:07:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:59,461 INFO L225 Difference]: With dead ends: 5970 [2021-06-05 15:07:59,462 INFO L226 Difference]: Without dead ends: 5769 [2021-06-05 15:07:59,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 280.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:07:59,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5769 states. [2021-06-05 15:07:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5769 to 5476. [2021-06-05 15:07:59,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5476 states, 5475 states have (on average 4.497168949771689) internal successors, (24622), 5475 states have internal predecessors, (24622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5476 states to 5476 states and 24622 transitions. [2021-06-05 15:07:59,581 INFO L78 Accepts]: Start accepts. Automaton has 5476 states and 24622 transitions. Word has length 30 [2021-06-05 15:07:59,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:59,581 INFO L482 AbstractCegarLoop]: Abstraction has 5476 states and 24622 transitions. [2021-06-05 15:07:59,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:59,581 INFO L276 IsEmpty]: Start isEmpty. Operand 5476 states and 24622 transitions. [2021-06-05 15:07:59,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:07:59,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:59,591 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:59,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:59,791 INFO L430 AbstractCegarLoop]: === Iteration 223 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:59,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1667325488, now seen corresponding path program 32 times [2021-06-05 15:07:59,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:59,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282145786] [2021-06-05 15:07:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:59,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:59,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282145786] [2021-06-05 15:07:59,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282145786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:59,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952884238] [2021-06-05 15:07:59,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:00,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:00,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:00,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:00,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:00,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:00,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:00,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:00,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:08:00,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:00,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:00,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:00,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:08:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:00,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952884238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:00,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:00,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:08:00,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703645442] [2021-06-05 15:08:00,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:08:00,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:00,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:08:00,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:08:00,214 INFO L87 Difference]: Start difference. First operand 5476 states and 24622 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:01,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:01,115 INFO L93 Difference]: Finished difference Result 5867 states and 26111 transitions. [2021-06-05 15:08:01,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:08:01,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:01,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:01,127 INFO L225 Difference]: With dead ends: 5867 [2021-06-05 15:08:01,128 INFO L226 Difference]: Without dead ends: 5769 [2021-06-05 15:08:01,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 562.2ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:08:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5769 states. [2021-06-05 15:08:01,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5769 to 5494. [2021-06-05 15:08:01,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5494 states, 5493 states have (on average 4.493901328964136) internal successors, (24685), 5493 states have internal predecessors, (24685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5494 states to 5494 states and 24685 transitions. [2021-06-05 15:08:01,205 INFO L78 Accepts]: Start accepts. Automaton has 5494 states and 24685 transitions. Word has length 30 [2021-06-05 15:08:01,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:01,205 INFO L482 AbstractCegarLoop]: Abstraction has 5494 states and 24685 transitions. [2021-06-05 15:08:01,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:01,205 INFO L276 IsEmpty]: Start isEmpty. Operand 5494 states and 24685 transitions. [2021-06-05 15:08:01,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:01,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:01,213 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:01,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:01,414 INFO L430 AbstractCegarLoop]: === Iteration 224 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:01,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:01,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2007157742, now seen corresponding path program 33 times [2021-06-05 15:08:01,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:01,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870717399] [2021-06-05 15:08:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:01,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:01,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870717399] [2021-06-05 15:08:01,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870717399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:01,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818234117] [2021-06-05 15:08:01,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:01,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:08:01,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:01,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:01,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:01,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:01,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:01,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:01,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 15:08:01,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:01,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:01,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:01,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:92 [2021-06-05 15:08:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:01,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818234117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:01,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:01,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:08:01,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876408998] [2021-06-05 15:08:01,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:01,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:01,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:01,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:01,965 INFO L87 Difference]: Start difference. First operand 5494 states and 24685 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:03,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:03,433 INFO L93 Difference]: Finished difference Result 6068 states and 26751 transitions. [2021-06-05 15:08:03,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:08:03,433 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:03,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:03,447 INFO L225 Difference]: With dead ends: 6068 [2021-06-05 15:08:03,447 INFO L226 Difference]: Without dead ends: 5848 [2021-06-05 15:08:03,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1082.4ms TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:08:03,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5848 states. [2021-06-05 15:08:03,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5848 to 5489. [2021-06-05 15:08:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5489 states, 5488 states have (on average 4.494533527696793) internal successors, (24666), 5488 states have internal predecessors, (24666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5489 states to 5489 states and 24666 transitions. [2021-06-05 15:08:03,548 INFO L78 Accepts]: Start accepts. Automaton has 5489 states and 24666 transitions. Word has length 30 [2021-06-05 15:08:03,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:03,549 INFO L482 AbstractCegarLoop]: Abstraction has 5489 states and 24666 transitions. [2021-06-05 15:08:03,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:03,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5489 states and 24666 transitions. [2021-06-05 15:08:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:03,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:03,558 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:03,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:03,759 INFO L430 AbstractCegarLoop]: === Iteration 225 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:03,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:03,759 INFO L82 PathProgramCache]: Analyzing trace with hash 353883056, now seen corresponding path program 34 times [2021-06-05 15:08:03,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:03,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768142300] [2021-06-05 15:08:03,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:03,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:03,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768142300] [2021-06-05 15:08:03,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768142300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:03,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942829443] [2021-06-05 15:08:03,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:03,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:03,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:03,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:03,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:04,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:04,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:04,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:04,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:08:04,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:04,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:04,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:04,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 15:08:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:04,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942829443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:04,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:04,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:08:04,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975004602] [2021-06-05 15:08:04,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:04,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:04,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:04,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:04,224 INFO L87 Difference]: Start difference. First operand 5489 states and 24666 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:05,360 INFO L93 Difference]: Finished difference Result 6192 states and 27402 transitions. [2021-06-05 15:08:05,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:08:05,361 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:05,375 INFO L225 Difference]: With dead ends: 6192 [2021-06-05 15:08:05,375 INFO L226 Difference]: Without dead ends: 6075 [2021-06-05 15:08:05,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 761.5ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:08:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6075 states. [2021-06-05 15:08:05,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6075 to 5488. [2021-06-05 15:08:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5488 states, 5487 states have (on average 4.494805904866047) internal successors, (24663), 5487 states have internal predecessors, (24663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:05,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 24663 transitions. [2021-06-05 15:08:05,479 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 24663 transitions. Word has length 30 [2021-06-05 15:08:05,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:05,479 INFO L482 AbstractCegarLoop]: Abstraction has 5488 states and 24663 transitions. [2021-06-05 15:08:05,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 24663 transitions. [2021-06-05 15:08:05,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:05,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:05,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:05,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:05,689 INFO L430 AbstractCegarLoop]: === Iteration 226 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:05,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:05,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1932960114, now seen corresponding path program 39 times [2021-06-05 15:08:05,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:05,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097353299] [2021-06-05 15:08:05,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:05,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:05,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097353299] [2021-06-05 15:08:05,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097353299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:05,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483452726] [2021-06-05 15:08:05,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:05,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:08:05,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:05,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:05,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:06,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:06,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:06,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:06,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 15:08:06,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:08:06,139 INFO L628 ElimStorePlain]: treesize reduction 8, result has 89.3 percent of original size [2021-06-05 15:08:06,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:06,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:106 [2021-06-05 15:08:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:06,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483452726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:06,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:06,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:08:06,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209399745] [2021-06-05 15:08:06,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:06,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:06,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:06,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:06,276 INFO L87 Difference]: Start difference. First operand 5488 states and 24663 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:08,013 INFO L93 Difference]: Finished difference Result 6287 states and 27478 transitions. [2021-06-05 15:08:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:08:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:08,028 INFO L225 Difference]: With dead ends: 6287 [2021-06-05 15:08:08,028 INFO L226 Difference]: Without dead ends: 6067 [2021-06-05 15:08:08,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1086.4ms TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:08:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6067 states. [2021-06-05 15:08:08,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6067 to 5514. [2021-06-05 15:08:08,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5514 states, 5513 states have (on average 4.492835116996191) internal successors, (24769), 5513 states have internal predecessors, (24769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 24769 transitions. [2021-06-05 15:08:08,145 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 24769 transitions. Word has length 30 [2021-06-05 15:08:08,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:08,145 INFO L482 AbstractCegarLoop]: Abstraction has 5514 states and 24769 transitions. [2021-06-05 15:08:08,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:08,145 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 24769 transitions. [2021-06-05 15:08:08,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:08,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:08,155 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:08,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:08,356 INFO L430 AbstractCegarLoop]: === Iteration 227 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:08,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:08,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1222660956, now seen corresponding path program 35 times [2021-06-05 15:08:08,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:08,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515936257] [2021-06-05 15:08:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:08,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:08,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515936257] [2021-06-05 15:08:08,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515936257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:08,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382380848] [2021-06-05 15:08:08,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:08,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:08:08,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:08,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:08,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:08,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:08,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:08,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:08,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 15:08:08,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:08,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:08,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:08,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 15:08:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:08,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382380848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:08,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:08,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:08:08,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215851364] [2021-06-05 15:08:08,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:08:08,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:08,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:08:08,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:08:08,854 INFO L87 Difference]: Start difference. First operand 5514 states and 24769 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:10,089 INFO L93 Difference]: Finished difference Result 6459 states and 28394 transitions. [2021-06-05 15:08:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:08:10,089 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:10,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:10,105 INFO L225 Difference]: With dead ends: 6459 [2021-06-05 15:08:10,105 INFO L226 Difference]: Without dead ends: 6370 [2021-06-05 15:08:10,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 702.9ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:08:10,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6370 states. [2021-06-05 15:08:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6370 to 5506. [2021-06-05 15:08:10,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5506 states, 5505 states have (on average 4.493914623069936) internal successors, (24739), 5505 states have internal predecessors, (24739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5506 states to 5506 states and 24739 transitions. [2021-06-05 15:08:10,215 INFO L78 Accepts]: Start accepts. Automaton has 5506 states and 24739 transitions. Word has length 30 [2021-06-05 15:08:10,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:10,215 INFO L482 AbstractCegarLoop]: Abstraction has 5506 states and 24739 transitions. [2021-06-05 15:08:10,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:10,216 INFO L276 IsEmpty]: Start isEmpty. Operand 5506 states and 24739 transitions. [2021-06-05 15:08:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:10,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:10,225 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:10,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:10,426 INFO L430 AbstractCegarLoop]: === Iteration 228 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:10,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:10,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1222272674, now seen corresponding path program 40 times [2021-06-05 15:08:10,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:10,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793985759] [2021-06-05 15:08:10,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:10,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:10,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793985759] [2021-06-05 15:08:10,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793985759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:10,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524032727] [2021-06-05 15:08:10,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:10,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:10,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:10,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:10,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:10,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:10,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:10,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:10,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:08:10,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:10,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:10,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:10,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:08:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:10,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524032727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:10,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:10,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 15:08:10,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574240513] [2021-06-05 15:08:10,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:10,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:10,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:10,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:10,893 INFO L87 Difference]: Start difference. First operand 5506 states and 24739 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:11,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:11,860 INFO L93 Difference]: Finished difference Result 6180 states and 27361 transitions. [2021-06-05 15:08:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:08:11,860 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:11,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:11,875 INFO L225 Difference]: With dead ends: 6180 [2021-06-05 15:08:11,875 INFO L226 Difference]: Without dead ends: 6107 [2021-06-05 15:08:11,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 734.5ms TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:08:11,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6107 states. [2021-06-05 15:08:11,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6107 to 5513. [2021-06-05 15:08:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5513 states, 5512 states have (on average 4.493105950653121) internal successors, (24766), 5512 states have internal predecessors, (24766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:11,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 24766 transitions. [2021-06-05 15:08:11,987 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 24766 transitions. Word has length 30 [2021-06-05 15:08:11,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:11,987 INFO L482 AbstractCegarLoop]: Abstraction has 5513 states and 24766 transitions. [2021-06-05 15:08:11,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:11,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 24766 transitions. [2021-06-05 15:08:11,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:11,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:11,997 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:12,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-06-05 15:08:12,197 INFO L430 AbstractCegarLoop]: === Iteration 229 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:12,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:12,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1460216054, now seen corresponding path program 41 times [2021-06-05 15:08:12,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:12,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181430623] [2021-06-05 15:08:12,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:12,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:12,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181430623] [2021-06-05 15:08:12,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181430623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:12,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671533674] [2021-06-05 15:08:12,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:12,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:08:12,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:12,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:12,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:12,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:12,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:12,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:12,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:08:12,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:12,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:12,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:12,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:08:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:12,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671533674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:12,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:12,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 15:08:12,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538366751] [2021-06-05 15:08:12,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:12,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:12,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:12,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:12,615 INFO L87 Difference]: Start difference. First operand 5513 states and 24766 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:13,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:13,588 INFO L93 Difference]: Finished difference Result 6173 states and 27328 transitions. [2021-06-05 15:08:13,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:08:13,588 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:13,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:13,603 INFO L225 Difference]: With dead ends: 6173 [2021-06-05 15:08:13,603 INFO L226 Difference]: Without dead ends: 6098 [2021-06-05 15:08:13,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 685.2ms TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:08:13,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6098 states. [2021-06-05 15:08:13,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6098 to 5516. [2021-06-05 15:08:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5516 states, 5515 states have (on average 4.492475067996374) internal successors, (24776), 5515 states have internal predecessors, (24776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:13,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5516 states to 5516 states and 24776 transitions. [2021-06-05 15:08:13,704 INFO L78 Accepts]: Start accepts. Automaton has 5516 states and 24776 transitions. Word has length 30 [2021-06-05 15:08:13,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:13,705 INFO L482 AbstractCegarLoop]: Abstraction has 5516 states and 24776 transitions. [2021-06-05 15:08:13,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:13,705 INFO L276 IsEmpty]: Start isEmpty. Operand 5516 states and 24776 transitions. [2021-06-05 15:08:13,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:13,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:13,714 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:13,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:13,915 INFO L430 AbstractCegarLoop]: === Iteration 230 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:13,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:13,915 INFO L82 PathProgramCache]: Analyzing trace with hash 603104802, now seen corresponding path program 36 times [2021-06-05 15:08:13,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:13,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525943793] [2021-06-05 15:08:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:14,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:14,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525943793] [2021-06-05 15:08:14,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525943793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:14,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866644351] [2021-06-05 15:08:14,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:14,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:08:14,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:14,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:14,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:14,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:14,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:14,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:08:14,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:14,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:14,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:14,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 15:08:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:14,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866644351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:14,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:14,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 15:08:14,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274266106] [2021-06-05 15:08:14,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:08:14,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:14,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:08:14,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:08:14,554 INFO L87 Difference]: Start difference. First operand 5516 states and 24776 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:17,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:17,197 INFO L93 Difference]: Finished difference Result 7881 states and 33810 transitions. [2021-06-05 15:08:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:08:17,198 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:17,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:17,217 INFO L225 Difference]: With dead ends: 7881 [2021-06-05 15:08:17,217 INFO L226 Difference]: Without dead ends: 7773 [2021-06-05 15:08:17,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1614.7ms TimeCoverageRelationStatistics Valid=402, Invalid=2568, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:08:17,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-06-05 15:08:17,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 5575. [2021-06-05 15:08:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5575 states, 5574 states have (on average 4.488876928597057) internal successors, (25021), 5574 states have internal predecessors, (25021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5575 states to 5575 states and 25021 transitions. [2021-06-05 15:08:17,349 INFO L78 Accepts]: Start accepts. Automaton has 5575 states and 25021 transitions. Word has length 30 [2021-06-05 15:08:17,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:17,349 INFO L482 AbstractCegarLoop]: Abstraction has 5575 states and 25021 transitions. [2021-06-05 15:08:17,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:17,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5575 states and 25021 transitions. [2021-06-05 15:08:17,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:17,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:17,359 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:17,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:17,560 INFO L430 AbstractCegarLoop]: === Iteration 231 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:17,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:17,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1925833962, now seen corresponding path program 37 times [2021-06-05 15:08:17,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:17,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770742773] [2021-06-05 15:08:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:17,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:17,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770742773] [2021-06-05 15:08:17,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770742773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:17,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075236932] [2021-06-05 15:08:17,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:17,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:17,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:17,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:17,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:17,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:17,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:08:17,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:17,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:17,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:17,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:08:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:17,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075236932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:17,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:17,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 15:08:17,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949630576] [2021-06-05 15:08:17,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:17,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:17,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:17,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:17,952 INFO L87 Difference]: Start difference. First operand 5575 states and 25021 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:19,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:19,483 INFO L93 Difference]: Finished difference Result 8124 states and 34651 transitions. [2021-06-05 15:08:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:08:19,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:19,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:19,503 INFO L225 Difference]: With dead ends: 8124 [2021-06-05 15:08:19,503 INFO L226 Difference]: Without dead ends: 8036 [2021-06-05 15:08:19,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 988.1ms TimeCoverageRelationStatistics Valid=330, Invalid=1650, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:08:19,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8036 states. [2021-06-05 15:08:19,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8036 to 5575. [2021-06-05 15:08:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5575 states, 5574 states have (on average 4.488697524219591) internal successors, (25020), 5574 states have internal predecessors, (25020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:19,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5575 states to 5575 states and 25020 transitions. [2021-06-05 15:08:19,636 INFO L78 Accepts]: Start accepts. Automaton has 5575 states and 25020 transitions. Word has length 30 [2021-06-05 15:08:19,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:19,636 INFO L482 AbstractCegarLoop]: Abstraction has 5575 states and 25020 transitions. [2021-06-05 15:08:19,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:19,636 INFO L276 IsEmpty]: Start isEmpty. Operand 5575 states and 25020 transitions. [2021-06-05 15:08:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:19,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:19,646 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:19,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 15:08:19,847 INFO L430 AbstractCegarLoop]: === Iteration 232 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:19,847 INFO L82 PathProgramCache]: Analyzing trace with hash -726234836, now seen corresponding path program 60 times [2021-06-05 15:08:19,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:19,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342239954] [2021-06-05 15:08:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:20,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:20,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342239954] [2021-06-05 15:08:20,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342239954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:20,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182947346] [2021-06-05 15:08:20,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:20,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:08:20,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:20,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:20,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:20,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:20,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:20,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:20,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:08:20,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:20,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:20,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:20,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:08:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:20,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182947346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:20,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:20,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:08:20,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378296761] [2021-06-05 15:08:20,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:08:20,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:20,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:08:20,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:08:20,317 INFO L87 Difference]: Start difference. First operand 5575 states and 25020 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:21,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:21,816 INFO L93 Difference]: Finished difference Result 6204 states and 27446 transitions. [2021-06-05 15:08:21,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:08:21,817 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:21,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:21,831 INFO L225 Difference]: With dead ends: 6204 [2021-06-05 15:08:21,832 INFO L226 Difference]: Without dead ends: 6090 [2021-06-05 15:08:21,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1203.1ms TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:08:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6090 states. [2021-06-05 15:08:21,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6090 to 5599. [2021-06-05 15:08:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5599 states, 5598 states have (on average 4.485709181850661) internal successors, (25111), 5598 states have internal predecessors, (25111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:21,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5599 states to 5599 states and 25111 transitions. [2021-06-05 15:08:21,968 INFO L78 Accepts]: Start accepts. Automaton has 5599 states and 25111 transitions. Word has length 30 [2021-06-05 15:08:21,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:21,968 INFO L482 AbstractCegarLoop]: Abstraction has 5599 states and 25111 transitions. [2021-06-05 15:08:21,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:21,968 INFO L276 IsEmpty]: Start isEmpty. Operand 5599 states and 25111 transitions. [2021-06-05 15:08:21,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:21,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:21,978 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:22,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 15:08:22,179 INFO L430 AbstractCegarLoop]: === Iteration 233 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:22,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:22,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1039761232, now seen corresponding path program 61 times [2021-06-05 15:08:22,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:22,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707532008] [2021-06-05 15:08:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:22,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:22,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707532008] [2021-06-05 15:08:22,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707532008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:22,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953538612] [2021-06-05 15:08:22,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:22,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:22,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:22,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:22,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:22,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:22,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:08:22,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:22,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:22,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:22,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:08:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:22,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953538612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:22,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:22,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:08:22,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497853962] [2021-06-05 15:08:22,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:08:22,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:22,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:08:22,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:08:22,683 INFO L87 Difference]: Start difference. First operand 5599 states and 25111 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:24,483 INFO L93 Difference]: Finished difference Result 6328 states and 27921 transitions. [2021-06-05 15:08:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:08:24,483 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:24,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:24,499 INFO L225 Difference]: With dead ends: 6328 [2021-06-05 15:08:24,499 INFO L226 Difference]: Without dead ends: 6188 [2021-06-05 15:08:24,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1397.1ms TimeCoverageRelationStatistics Valid=425, Invalid=1927, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:08:24,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6188 states. [2021-06-05 15:08:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6188 to 5594. [2021-06-05 15:08:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5594 states, 5593 states have (on average 4.486500983372072) internal successors, (25093), 5593 states have internal predecessors, (25093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5594 states to 5594 states and 25093 transitions. [2021-06-05 15:08:24,602 INFO L78 Accepts]: Start accepts. Automaton has 5594 states and 25093 transitions. Word has length 30 [2021-06-05 15:08:24,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:24,602 INFO L482 AbstractCegarLoop]: Abstraction has 5594 states and 25093 transitions. [2021-06-05 15:08:24,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 5594 states and 25093 transitions. [2021-06-05 15:08:24,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:24,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:24,612 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:24,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 15:08:24,812 INFO L430 AbstractCegarLoop]: === Iteration 234 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:24,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:24,813 INFO L82 PathProgramCache]: Analyzing trace with hash 418808324, now seen corresponding path program 62 times [2021-06-05 15:08:24,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:24,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437284736] [2021-06-05 15:08:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:25,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:25,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437284736] [2021-06-05 15:08:25,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437284736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:25,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629805395] [2021-06-05 15:08:25,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:25,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:25,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:25,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:25,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:25,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:25,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 15:08:25,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:08:25,312 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-06-05 15:08:25,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:08:25,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:111 [2021-06-05 15:08:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:25,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629805395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:25,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:25,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:08:25,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126509722] [2021-06-05 15:08:25,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:25,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:25,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:25,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:25,450 INFO L87 Difference]: Start difference. First operand 5594 states and 25093 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:27,203 INFO L93 Difference]: Finished difference Result 6585 states and 28779 transitions. [2021-06-05 15:08:27,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:08:27,203 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:27,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:27,219 INFO L225 Difference]: With dead ends: 6585 [2021-06-05 15:08:27,219 INFO L226 Difference]: Without dead ends: 6303 [2021-06-05 15:08:27,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1509.1ms TimeCoverageRelationStatistics Valid=342, Invalid=1820, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:08:27,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6303 states. [2021-06-05 15:08:27,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6303 to 5611. [2021-06-05 15:08:27,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5611 states, 5610 states have (on average 4.486274509803922) internal successors, (25168), 5610 states have internal predecessors, (25168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5611 states to 5611 states and 25168 transitions. [2021-06-05 15:08:27,322 INFO L78 Accepts]: Start accepts. Automaton has 5611 states and 25168 transitions. Word has length 30 [2021-06-05 15:08:27,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:27,322 INFO L482 AbstractCegarLoop]: Abstraction has 5611 states and 25168 transitions. [2021-06-05 15:08:27,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 5611 states and 25168 transitions. [2021-06-05 15:08:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:27,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:27,332 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:27,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:27,532 INFO L430 AbstractCegarLoop]: === Iteration 235 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:27,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:27,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1146174864, now seen corresponding path program 42 times [2021-06-05 15:08:27,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:27,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588350016] [2021-06-05 15:08:27,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:27,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:27,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588350016] [2021-06-05 15:08:27,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588350016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:27,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582563393] [2021-06-05 15:08:27,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:27,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:08:27,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:27,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:27,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:27,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:27,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:27,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:27,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:27,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 15:08:27,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:08:27,994 INFO L628 ElimStorePlain]: treesize reduction 27, result has 50.0 percent of original size [2021-06-05 15:08:28,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:28,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 15:08:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:28,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582563393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:28,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:28,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:08:28,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542576614] [2021-06-05 15:08:28,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:08:28,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:28,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:08:28,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:08:28,078 INFO L87 Difference]: Start difference. First operand 5611 states and 25168 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:29,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:29,665 INFO L93 Difference]: Finished difference Result 6577 states and 29018 transitions. [2021-06-05 15:08:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:08:29,665 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:29,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:29,681 INFO L225 Difference]: With dead ends: 6577 [2021-06-05 15:08:29,681 INFO L226 Difference]: Without dead ends: 6451 [2021-06-05 15:08:29,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 901.7ms TimeCoverageRelationStatistics Valid=252, Invalid=1818, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:08:29,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2021-06-05 15:08:29,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 5611. [2021-06-05 15:08:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5611 states, 5610 states have (on average 4.485561497326203) internal successors, (25164), 5610 states have internal predecessors, (25164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5611 states to 5611 states and 25164 transitions. [2021-06-05 15:08:29,819 INFO L78 Accepts]: Start accepts. Automaton has 5611 states and 25164 transitions. Word has length 30 [2021-06-05 15:08:29,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:29,819 INFO L482 AbstractCegarLoop]: Abstraction has 5611 states and 25164 transitions. [2021-06-05 15:08:29,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5611 states and 25164 transitions. [2021-06-05 15:08:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:29,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:29,829 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:30,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:30,029 INFO L430 AbstractCegarLoop]: === Iteration 236 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:30,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:30,029 INFO L82 PathProgramCache]: Analyzing trace with hash -441805900, now seen corresponding path program 43 times [2021-06-05 15:08:30,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:30,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259422179] [2021-06-05 15:08:30,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:30,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:30,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259422179] [2021-06-05 15:08:30,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259422179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:30,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060813399] [2021-06-05 15:08:30,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:30,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:30,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:30,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:30,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:30,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:30,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:08:30,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:30,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:30,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:30,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:08:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:30,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060813399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:30,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:30,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:08:30,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889087447] [2021-06-05 15:08:30,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:08:30,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:30,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:08:30,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:08:30,518 INFO L87 Difference]: Start difference. First operand 5611 states and 25164 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:31,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:31,962 INFO L93 Difference]: Finished difference Result 6142 states and 27174 transitions. [2021-06-05 15:08:31,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:08:31,962 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:31,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:31,977 INFO L225 Difference]: With dead ends: 6142 [2021-06-05 15:08:31,977 INFO L226 Difference]: Without dead ends: 6028 [2021-06-05 15:08:31,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 933.7ms TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:08:31,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6028 states. [2021-06-05 15:08:32,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6028 to 5622. [2021-06-05 15:08:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5622 states, 5621 states have (on average 4.484789183419321) internal successors, (25209), 5621 states have internal predecessors, (25209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:32,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5622 states to 5622 states and 25209 transitions. [2021-06-05 15:08:32,084 INFO L78 Accepts]: Start accepts. Automaton has 5622 states and 25209 transitions. Word has length 30 [2021-06-05 15:08:32,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:32,084 INFO L482 AbstractCegarLoop]: Abstraction has 5622 states and 25209 transitions. [2021-06-05 15:08:32,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:32,084 INFO L276 IsEmpty]: Start isEmpty. Operand 5622 states and 25209 transitions. [2021-06-05 15:08:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:32,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:32,094 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:32,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:32,295 INFO L430 AbstractCegarLoop]: === Iteration 237 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:32,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:32,295 INFO L82 PathProgramCache]: Analyzing trace with hash -974562882, now seen corresponding path program 44 times [2021-06-05 15:08:32,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:32,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827914687] [2021-06-05 15:08:32,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:32,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:32,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827914687] [2021-06-05 15:08:32,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827914687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:32,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418575018] [2021-06-05 15:08:32,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:32,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:32,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:32,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:32,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:32,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:32,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:32,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:32,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:08:32,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:32,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:32,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:32,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-06-05 15:08:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:32,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418575018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:32,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:32,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 15:08:32,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277242938] [2021-06-05 15:08:32,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:32,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:32,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:32,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:32,950 INFO L87 Difference]: Start difference. First operand 5622 states and 25209 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:34,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:34,832 INFO L93 Difference]: Finished difference Result 6176 states and 27227 transitions. [2021-06-05 15:08:34,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:08:34,832 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:34,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:34,847 INFO L225 Difference]: With dead ends: 6176 [2021-06-05 15:08:34,847 INFO L226 Difference]: Without dead ends: 6011 [2021-06-05 15:08:34,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1185.9ms TimeCoverageRelationStatistics Valid=227, Invalid=1495, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:08:34,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-05 15:08:34,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 5622. [2021-06-05 15:08:34,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5622 states, 5621 states have (on average 4.484077566269347) internal successors, (25205), 5621 states have internal predecessors, (25205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5622 states to 5622 states and 25205 transitions. [2021-06-05 15:08:34,951 INFO L78 Accepts]: Start accepts. Automaton has 5622 states and 25205 transitions. Word has length 30 [2021-06-05 15:08:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:34,951 INFO L482 AbstractCegarLoop]: Abstraction has 5622 states and 25205 transitions. [2021-06-05 15:08:34,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:34,951 INFO L276 IsEmpty]: Start isEmpty. Operand 5622 states and 25205 transitions. [2021-06-05 15:08:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:34,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:34,961 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:35,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:35,163 INFO L430 AbstractCegarLoop]: === Iteration 238 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:35,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:35,163 INFO L82 PathProgramCache]: Analyzing trace with hash 740206354, now seen corresponding path program 63 times [2021-06-05 15:08:35,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:35,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460353908] [2021-06-05 15:08:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:35,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:35,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460353908] [2021-06-05 15:08:35,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460353908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:35,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134915466] [2021-06-05 15:08:35,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:35,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:08:35,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:35,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:35,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:35,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:35,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:35,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 15:08:35,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:08:35,636 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-06-05 15:08:35,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:08:35,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:111 [2021-06-05 15:08:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:35,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134915466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:35,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:35,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:08:35,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682778901] [2021-06-05 15:08:35,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:35,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:35,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:35,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:35,786 INFO L87 Difference]: Start difference. First operand 5622 states and 25205 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:36,154 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-06-05 15:08:38,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:38,036 INFO L93 Difference]: Finished difference Result 6657 states and 29050 transitions. [2021-06-05 15:08:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:08:38,036 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:38,052 INFO L225 Difference]: With dead ends: 6657 [2021-06-05 15:08:38,052 INFO L226 Difference]: Without dead ends: 6375 [2021-06-05 15:08:38,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1644.3ms TimeCoverageRelationStatistics Valid=345, Invalid=2007, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:08:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2021-06-05 15:08:38,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 5641. [2021-06-05 15:08:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5640 states have (on average 4.483156028368795) internal successors, (25285), 5640 states have internal predecessors, (25285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 25285 transitions. [2021-06-05 15:08:38,161 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 25285 transitions. Word has length 30 [2021-06-05 15:08:38,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:38,161 INFO L482 AbstractCegarLoop]: Abstraction has 5641 states and 25285 transitions. [2021-06-05 15:08:38,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:38,161 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 25285 transitions. [2021-06-05 15:08:38,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:38,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:38,172 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:38,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-06-05 15:08:38,372 INFO L430 AbstractCegarLoop]: === Iteration 239 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:38,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:38,372 INFO L82 PathProgramCache]: Analyzing trace with hash -824776834, now seen corresponding path program 45 times [2021-06-05 15:08:38,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:38,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415512034] [2021-06-05 15:08:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:38,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:38,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415512034] [2021-06-05 15:08:38,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415512034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:38,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453002809] [2021-06-05 15:08:38,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:38,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:08:38,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:38,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:38,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:38,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:38,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:38,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:38,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:08:38,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:38,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:38,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:38,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 15:08:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:38,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453002809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:38,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:38,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:08:38,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816426837] [2021-06-05 15:08:38,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:38,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:38,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:38,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:38,894 INFO L87 Difference]: Start difference. First operand 5641 states and 25285 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:40,096 INFO L93 Difference]: Finished difference Result 6310 states and 27865 transitions. [2021-06-05 15:08:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:08:40,096 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:40,111 INFO L225 Difference]: With dead ends: 6310 [2021-06-05 15:08:40,112 INFO L226 Difference]: Without dead ends: 6171 [2021-06-05 15:08:40,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 717.3ms TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:08:40,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6171 states. [2021-06-05 15:08:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6171 to 5653. [2021-06-05 15:08:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5653 states, 5652 states have (on average 4.479830148619958) internal successors, (25320), 5652 states have internal predecessors, (25320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5653 states to 5653 states and 25320 transitions. [2021-06-05 15:08:40,219 INFO L78 Accepts]: Start accepts. Automaton has 5653 states and 25320 transitions. Word has length 30 [2021-06-05 15:08:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:40,219 INFO L482 AbstractCegarLoop]: Abstraction has 5653 states and 25320 transitions. [2021-06-05 15:08:40,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 5653 states and 25320 transitions. [2021-06-05 15:08:40,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:40,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:40,229 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:40,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:40,430 INFO L430 AbstractCegarLoop]: === Iteration 240 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:40,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:40,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1020757778, now seen corresponding path program 46 times [2021-06-05 15:08:40,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:40,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789068116] [2021-06-05 15:08:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:40,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:40,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789068116] [2021-06-05 15:08:40,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789068116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:40,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653345282] [2021-06-05 15:08:40,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:40,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:40,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:40,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:40,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:40,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:40,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:40,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:40,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:08:40,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:40,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:40,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:40,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 15:08:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:40,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653345282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:40,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:40,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:08:40,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064258132] [2021-06-05 15:08:40,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:40,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:40,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:40,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:40,868 INFO L87 Difference]: Start difference. First operand 5653 states and 25320 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:42,369 INFO L93 Difference]: Finished difference Result 6753 states and 29585 transitions. [2021-06-05 15:08:42,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:08:42,370 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:42,386 INFO L225 Difference]: With dead ends: 6753 [2021-06-05 15:08:42,386 INFO L226 Difference]: Without dead ends: 6620 [2021-06-05 15:08:42,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 927.9ms TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:08:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6620 states. [2021-06-05 15:08:42,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6620 to 5673. [2021-06-05 15:08:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5673 states, 5672 states have (on average 4.474612129760225) internal successors, (25380), 5672 states have internal predecessors, (25380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5673 states to 5673 states and 25380 transitions. [2021-06-05 15:08:42,494 INFO L78 Accepts]: Start accepts. Automaton has 5673 states and 25380 transitions. Word has length 30 [2021-06-05 15:08:42,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:42,494 INFO L482 AbstractCegarLoop]: Abstraction has 5673 states and 25380 transitions. [2021-06-05 15:08:42,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 5673 states and 25380 transitions. [2021-06-05 15:08:42,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:42,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:42,504 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:42,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable527 [2021-06-05 15:08:42,705 INFO L430 AbstractCegarLoop]: === Iteration 241 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:42,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1527104044, now seen corresponding path program 47 times [2021-06-05 15:08:42,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:42,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366818508] [2021-06-05 15:08:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:42,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:42,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366818508] [2021-06-05 15:08:42,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366818508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:42,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920069606] [2021-06-05 15:08:42,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:42,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:08:42,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:42,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:42,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:43,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:43,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:43,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:43,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:08:43,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:43,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:43,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:43,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 15:08:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:43,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920069606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:43,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:43,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:08:43,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272933015] [2021-06-05 15:08:43,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:43,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:43,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:43,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:43,154 INFO L87 Difference]: Start difference. First operand 5673 states and 25380 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:44,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:44,406 INFO L93 Difference]: Finished difference Result 6319 states and 27877 transitions. [2021-06-05 15:08:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:08:44,407 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:44,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:44,422 INFO L225 Difference]: With dead ends: 6319 [2021-06-05 15:08:44,422 INFO L226 Difference]: Without dead ends: 6164 [2021-06-05 15:08:44,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 674.6ms TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:08:44,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6164 states. [2021-06-05 15:08:44,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6164 to 5657. [2021-06-05 15:08:44,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5657 states, 5656 states have (on average 4.478606789250354) internal successors, (25331), 5656 states have internal predecessors, (25331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:44,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5657 states to 5657 states and 25331 transitions. [2021-06-05 15:08:44,525 INFO L78 Accepts]: Start accepts. Automaton has 5657 states and 25331 transitions. Word has length 30 [2021-06-05 15:08:44,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:44,525 INFO L482 AbstractCegarLoop]: Abstraction has 5657 states and 25331 transitions. [2021-06-05 15:08:44,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 5657 states and 25331 transitions. [2021-06-05 15:08:44,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:44,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:44,536 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:44,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:44,739 INFO L430 AbstractCegarLoop]: === Iteration 242 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:44,739 INFO L82 PathProgramCache]: Analyzing trace with hash 423059838, now seen corresponding path program 48 times [2021-06-05 15:08:44,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:44,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832652048] [2021-06-05 15:08:44,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:44,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:44,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832652048] [2021-06-05 15:08:44,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832652048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:44,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530539888] [2021-06-05 15:08:44,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:45,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:08:45,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:45,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:45,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:45,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:45,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:45,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-05 15:08:45,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:45,209 INFO L628 ElimStorePlain]: treesize reduction 5, result has 92.5 percent of original size [2021-06-05 15:08:45,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:45,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:472 [2021-06-05 15:08:45,413 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-05 15:08:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:45,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530539888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:45,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:45,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:08:45,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877358049] [2021-06-05 15:08:45,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:08:45,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:45,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:08:45,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:08:45,751 INFO L87 Difference]: Start difference. First operand 5657 states and 25331 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:48,040 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 15:08:48,505 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 15:08:48,707 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-05 15:08:49,275 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 15:08:49,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:49,276 INFO L93 Difference]: Finished difference Result 6721 states and 29437 transitions. [2021-06-05 15:08:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 15:08:49,276 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:49,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:49,291 INFO L225 Difference]: With dead ends: 6721 [2021-06-05 15:08:49,292 INFO L226 Difference]: Without dead ends: 6612 [2021-06-05 15:08:49,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2844.9ms TimeCoverageRelationStatistics Valid=443, Invalid=3717, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:08:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6612 states. [2021-06-05 15:08:49,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6612 to 5685. [2021-06-05 15:08:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5685 states, 5684 states have (on average 4.474313863476425) internal successors, (25432), 5684 states have internal predecessors, (25432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5685 states to 5685 states and 25432 transitions. [2021-06-05 15:08:49,395 INFO L78 Accepts]: Start accepts. Automaton has 5685 states and 25432 transitions. Word has length 30 [2021-06-05 15:08:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:49,395 INFO L482 AbstractCegarLoop]: Abstraction has 5685 states and 25432 transitions. [2021-06-05 15:08:49,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 5685 states and 25432 transitions. [2021-06-05 15:08:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:49,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:49,406 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:49,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-06-05 15:08:49,606 INFO L430 AbstractCegarLoop]: === Iteration 243 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:49,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:49,607 INFO L82 PathProgramCache]: Analyzing trace with hash -972527238, now seen corresponding path program 49 times [2021-06-05 15:08:49,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:49,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171526476] [2021-06-05 15:08:49,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:49,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:49,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171526476] [2021-06-05 15:08:49,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171526476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:49,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575639277] [2021-06-05 15:08:49,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:49,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:49,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:50,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:50,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:50,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:50,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:08:50,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:50,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:50,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:50,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:08:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:50,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575639277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:50,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:50,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:08:50,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501208539] [2021-06-05 15:08:50,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:50,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:50,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:50,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:50,115 INFO L87 Difference]: Start difference. First operand 5685 states and 25432 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:52,504 INFO L93 Difference]: Finished difference Result 6382 states and 27917 transitions. [2021-06-05 15:08:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:08:52,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:52,520 INFO L225 Difference]: With dead ends: 6382 [2021-06-05 15:08:52,520 INFO L226 Difference]: Without dead ends: 6232 [2021-06-05 15:08:52,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1881.7ms TimeCoverageRelationStatistics Valid=579, Invalid=3453, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:08:52,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6232 states. [2021-06-05 15:08:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6232 to 5689. [2021-06-05 15:08:52,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5689 states, 5688 states have (on average 4.473101265822785) internal successors, (25443), 5688 states have internal predecessors, (25443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5689 states to 5689 states and 25443 transitions. [2021-06-05 15:08:52,629 INFO L78 Accepts]: Start accepts. Automaton has 5689 states and 25443 transitions. Word has length 30 [2021-06-05 15:08:52,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:52,629 INFO L482 AbstractCegarLoop]: Abstraction has 5689 states and 25443 transitions. [2021-06-05 15:08:52,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5689 states and 25443 transitions. [2021-06-05 15:08:52,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:52,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:52,639 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:52,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:52,842 INFO L430 AbstractCegarLoop]: === Iteration 244 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:52,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:52,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1336230824, now seen corresponding path program 50 times [2021-06-05 15:08:52,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:52,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180473523] [2021-06-05 15:08:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:53,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:53,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180473523] [2021-06-05 15:08:53,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180473523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:53,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258670581] [2021-06-05 15:08:53,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:53,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:53,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:53,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:53,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:53,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:53,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:53,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:08:53,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:53,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:53,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:53,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-05 15:08:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:53,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258670581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:53,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:53,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 15:08:53,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043789086] [2021-06-05 15:08:53,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:53,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:53,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:53,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:53,602 INFO L87 Difference]: Start difference. First operand 5689 states and 25443 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:55,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:55,639 INFO L93 Difference]: Finished difference Result 6232 states and 27434 transitions. [2021-06-05 15:08:55,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:08:55,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:55,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:55,653 INFO L225 Difference]: With dead ends: 6232 [2021-06-05 15:08:55,653 INFO L226 Difference]: Without dead ends: 6058 [2021-06-05 15:08:55,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1543.9ms TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:08:55,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6058 states. [2021-06-05 15:08:55,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6058 to 5692. [2021-06-05 15:08:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5692 states, 5691 states have (on average 4.473203303461606) internal successors, (25457), 5691 states have internal predecessors, (25457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 25457 transitions. [2021-06-05 15:08:55,756 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 25457 transitions. Word has length 30 [2021-06-05 15:08:55,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:55,756 INFO L482 AbstractCegarLoop]: Abstraction has 5692 states and 25457 transitions. [2021-06-05 15:08:55,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 25457 transitions. [2021-06-05 15:08:55,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:55,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:55,766 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:55,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-06-05 15:08:55,967 INFO L430 AbstractCegarLoop]: === Iteration 245 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1868987806, now seen corresponding path program 51 times [2021-06-05 15:08:55,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:55,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160677771] [2021-06-05 15:08:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:56,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:56,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160677771] [2021-06-05 15:08:56,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160677771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:56,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914805279] [2021-06-05 15:08:56,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:56,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:08:56,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:56,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:56,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:56,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:56,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:56,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:08:56,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:56,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:56,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:56,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-05 15:08:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:56,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914805279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:56,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:56,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 15:08:56,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695785908] [2021-06-05 15:08:56,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:56,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:56,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:56,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:56,670 INFO L87 Difference]: Start difference. First operand 5692 states and 25457 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:58,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:58,097 INFO L93 Difference]: Finished difference Result 6151 states and 27130 transitions. [2021-06-05 15:08:58,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:08:58,097 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:08:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:58,111 INFO L225 Difference]: With dead ends: 6151 [2021-06-05 15:08:58,112 INFO L226 Difference]: Without dead ends: 6004 [2021-06-05 15:08:58,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1145.6ms TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:08:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6004 states. [2021-06-05 15:08:58,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6004 to 5692. [2021-06-05 15:08:58,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5692 states, 5691 states have (on average 4.4725004392901075) internal successors, (25453), 5691 states have internal predecessors, (25453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 25453 transitions. [2021-06-05 15:08:58,208 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 25453 transitions. Word has length 30 [2021-06-05 15:08:58,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:58,208 INFO L482 AbstractCegarLoop]: Abstraction has 5692 states and 25453 transitions. [2021-06-05 15:08:58,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:58,208 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 25453 transitions. [2021-06-05 15:08:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:08:58,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:58,217 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:58,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 15:08:58,417 INFO L430 AbstractCegarLoop]: === Iteration 246 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:58,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:58,417 INFO L82 PathProgramCache]: Analyzing trace with hash 580244706, now seen corresponding path program 52 times [2021-06-05 15:08:58,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:58,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868018918] [2021-06-05 15:08:58,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:58,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:58,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868018918] [2021-06-05 15:08:58,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868018918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:58,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125819122] [2021-06-05 15:08:58,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:58,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:58,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:58,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:58,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:58,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:58,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:58,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:58,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:08:58,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:58,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:58,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:58,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:08:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:58,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125819122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:58,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:58,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:08:58,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372836304] [2021-06-05 15:08:58,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:58,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:58,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:58,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:58,911 INFO L87 Difference]: Start difference. First operand 5692 states and 25453 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:01,383 INFO L93 Difference]: Finished difference Result 6381 states and 27946 transitions. [2021-06-05 15:09:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:09:01,383 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:01,398 INFO L225 Difference]: With dead ends: 6381 [2021-06-05 15:09:01,399 INFO L226 Difference]: Without dead ends: 6250 [2021-06-05 15:09:01,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1875.6ms TimeCoverageRelationStatistics Valid=552, Invalid=3230, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:09:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6250 states. [2021-06-05 15:09:01,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6250 to 5710. [2021-06-05 15:09:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5710 states, 5709 states have (on average 4.468733578560168) internal successors, (25512), 5709 states have internal predecessors, (25512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:01,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 25512 transitions. [2021-06-05 15:09:01,503 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 25512 transitions. Word has length 30 [2021-06-05 15:09:01,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:01,503 INFO L482 AbstractCegarLoop]: Abstraction has 5710 states and 25512 transitions. [2021-06-05 15:09:01,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:01,503 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 25512 transitions. [2021-06-05 15:09:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:01,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:01,514 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:01,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:01,714 INFO L430 AbstractCegarLoop]: === Iteration 247 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:01,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:01,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1970358584, now seen corresponding path program 53 times [2021-06-05 15:09:01,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:01,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757101252] [2021-06-05 15:09:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:01,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:01,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757101252] [2021-06-05 15:09:01,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757101252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:01,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57361567] [2021-06-05 15:09:01,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:02,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:09:02,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:02,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:09:02,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:02,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:02,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:02,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:02,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 15:09:02,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:02,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:02,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:02,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:220 [2021-06-05 15:09:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:02,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57361567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:02,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:02,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:09:02,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54583243] [2021-06-05 15:09:02,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:09:02,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:02,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:09:02,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:09:02,400 INFO L87 Difference]: Start difference. First operand 5710 states and 25512 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:03,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:03,757 INFO L93 Difference]: Finished difference Result 6435 states and 28449 transitions. [2021-06-05 15:09:03,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:09:03,757 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:03,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:03,773 INFO L225 Difference]: With dead ends: 6435 [2021-06-05 15:09:03,773 INFO L226 Difference]: Without dead ends: 6367 [2021-06-05 15:09:03,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1199.2ms TimeCoverageRelationStatistics Valid=208, Invalid=1772, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:09:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2021-06-05 15:09:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 5709. [2021-06-05 15:09:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 4.46916608269096) internal successors, (25510), 5708 states have internal predecessors, (25510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 25510 transitions. [2021-06-05 15:09:03,877 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 25510 transitions. Word has length 30 [2021-06-05 15:09:03,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:03,877 INFO L482 AbstractCegarLoop]: Abstraction has 5709 states and 25510 transitions. [2021-06-05 15:09:03,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:03,877 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 25510 transitions. [2021-06-05 15:09:03,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:03,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:03,886 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:04,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:04,087 INFO L430 AbstractCegarLoop]: === Iteration 248 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:04,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1799244982, now seen corresponding path program 54 times [2021-06-05 15:09:04,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:04,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482953128] [2021-06-05 15:09:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:04,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:04,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482953128] [2021-06-05 15:09:04,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482953128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:04,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778334691] [2021-06-05 15:09:04,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:04,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:09:04,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:04,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:09:04,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:04,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:04,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:04,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-05 15:09:04,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:04,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:04,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:04,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:57 [2021-06-05 15:09:04,794 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-05 15:09:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:05,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778334691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:05,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:05,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:09:05,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17393977] [2021-06-05 15:09:05,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:09:05,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:05,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:09:05,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:09:05,033 INFO L87 Difference]: Start difference. First operand 5709 states and 25510 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:05,715 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-06-05 15:09:05,976 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-06-05 15:09:06,186 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-06-05 15:09:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:08,711 INFO L93 Difference]: Finished difference Result 6776 states and 29685 transitions. [2021-06-05 15:09:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:09:08,712 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:08,763 INFO L225 Difference]: With dead ends: 6776 [2021-06-05 15:09:08,763 INFO L226 Difference]: Without dead ends: 6619 [2021-06-05 15:09:08,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 3202.2ms TimeCoverageRelationStatistics Valid=467, Invalid=3439, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:09:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6619 states. [2021-06-05 15:09:08,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6619 to 5689. [2021-06-05 15:09:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5689 states, 5688 states have (on average 4.472925457102672) internal successors, (25442), 5688 states have internal predecessors, (25442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5689 states to 5689 states and 25442 transitions. [2021-06-05 15:09:08,865 INFO L78 Accepts]: Start accepts. Automaton has 5689 states and 25442 transitions. Word has length 30 [2021-06-05 15:09:08,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:08,865 INFO L482 AbstractCegarLoop]: Abstraction has 5689 states and 25442 transitions. [2021-06-05 15:09:08,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:08,865 INFO L276 IsEmpty]: Start isEmpty. Operand 5689 states and 25442 transitions. [2021-06-05 15:09:08,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:08,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:08,875 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:09,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 15:09:09,076 INFO L430 AbstractCegarLoop]: === Iteration 249 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:09,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:09,076 INFO L82 PathProgramCache]: Analyzing trace with hash -626091868, now seen corresponding path program 55 times [2021-06-05 15:09:09,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:09,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592286816] [2021-06-05 15:09:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:09,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:09,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592286816] [2021-06-05 15:09:09,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592286816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:09,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56864545] [2021-06-05 15:09:09,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:09,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:09,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:09,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:09,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:09,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:09,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:09:09,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:09,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:09,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:09,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:09:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:09,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56864545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:09,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:09,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:09:09,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254091696] [2021-06-05 15:09:09,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:09:09,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:09,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:09:09,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:09:09,641 INFO L87 Difference]: Start difference. First operand 5689 states and 25442 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:10,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:10,954 INFO L93 Difference]: Finished difference Result 6232 states and 27534 transitions. [2021-06-05 15:09:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:09:10,954 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:10,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:10,968 INFO L225 Difference]: With dead ends: 6232 [2021-06-05 15:09:10,968 INFO L226 Difference]: Without dead ends: 6095 [2021-06-05 15:09:10,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 997.4ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:09:10,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6095 states. [2021-06-05 15:09:11,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6095 to 5698. [2021-06-05 15:09:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5698 states, 5697 states have (on average 4.470774091627172) internal successors, (25470), 5697 states have internal predecessors, (25470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5698 states to 5698 states and 25470 transitions. [2021-06-05 15:09:11,074 INFO L78 Accepts]: Start accepts. Automaton has 5698 states and 25470 transitions. Word has length 30 [2021-06-05 15:09:11,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:11,074 INFO L482 AbstractCegarLoop]: Abstraction has 5698 states and 25470 transitions. [2021-06-05 15:09:11,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:11,074 INFO L276 IsEmpty]: Start isEmpty. Operand 5698 states and 25470 transitions. [2021-06-05 15:09:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:11,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:11,084 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:11,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:11,285 INFO L430 AbstractCegarLoop]: === Iteration 250 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:11,285 INFO L82 PathProgramCache]: Analyzing trace with hash 97329558, now seen corresponding path program 8 times [2021-06-05 15:09:11,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:11,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471102307] [2021-06-05 15:09:11,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:11,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:11,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471102307] [2021-06-05 15:09:11,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471102307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:11,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485877841] [2021-06-05 15:09:11,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:11,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:11,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:11,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:11,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:11,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:11,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:11,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:11,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:09:11,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:11,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:11,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:11,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:09:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:11,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485877841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:11,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:11,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 15:09:11,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94267974] [2021-06-05 15:09:11,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:09:11,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:11,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:09:11,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:09:11,641 INFO L87 Difference]: Start difference. First operand 5698 states and 25470 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:12,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:12,302 INFO L93 Difference]: Finished difference Result 6221 states and 27393 transitions. [2021-06-05 15:09:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:09:12,302 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:12,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:12,316 INFO L225 Difference]: With dead ends: 6221 [2021-06-05 15:09:12,316 INFO L226 Difference]: Without dead ends: 6020 [2021-06-05 15:09:12,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6020 states. [2021-06-05 15:09:12,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6020 to 5701. [2021-06-05 15:09:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5701 states, 5700 states have (on average 4.470701754385965) internal successors, (25483), 5700 states have internal predecessors, (25483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:12,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5701 states to 5701 states and 25483 transitions. [2021-06-05 15:09:12,455 INFO L78 Accepts]: Start accepts. Automaton has 5701 states and 25483 transitions. Word has length 30 [2021-06-05 15:09:12,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:12,455 INFO L482 AbstractCegarLoop]: Abstraction has 5701 states and 25483 transitions. [2021-06-05 15:09:12,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:12,455 INFO L276 IsEmpty]: Start isEmpty. Operand 5701 states and 25483 transitions. [2021-06-05 15:09:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:12,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:12,465 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:12,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:12,669 INFO L430 AbstractCegarLoop]: === Iteration 251 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:12,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:12,669 INFO L82 PathProgramCache]: Analyzing trace with hash -949036506, now seen corresponding path program 38 times [2021-06-05 15:09:12,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:12,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084731716] [2021-06-05 15:09:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:12,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:12,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084731716] [2021-06-05 15:09:12,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084731716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:12,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471950267] [2021-06-05 15:09:12,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:12,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:12,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:12,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:12,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:13,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:13,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:13,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:13,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:09:13,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:13,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:13,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:13,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:09:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:13,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471950267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:13,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:13,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:09:13,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144775621] [2021-06-05 15:09:13,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:09:13,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:13,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:09:13,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:09:13,094 INFO L87 Difference]: Start difference. First operand 5701 states and 25483 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:13,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:13,839 INFO L93 Difference]: Finished difference Result 6090 states and 26960 transitions. [2021-06-05 15:09:13,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:09:13,839 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:13,853 INFO L225 Difference]: With dead ends: 6090 [2021-06-05 15:09:13,853 INFO L226 Difference]: Without dead ends: 5992 [2021-06-05 15:09:13,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 559.7ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:09:13,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5992 states. [2021-06-05 15:09:13,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5992 to 5722. [2021-06-05 15:09:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5722 states, 5721 states have (on average 4.468274777136864) internal successors, (25563), 5721 states have internal predecessors, (25563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5722 states to 5722 states and 25563 transitions. [2021-06-05 15:09:13,955 INFO L78 Accepts]: Start accepts. Automaton has 5722 states and 25563 transitions. Word has length 30 [2021-06-05 15:09:13,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:13,955 INFO L482 AbstractCegarLoop]: Abstraction has 5722 states and 25563 transitions. [2021-06-05 15:09:13,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:13,955 INFO L276 IsEmpty]: Start isEmpty. Operand 5722 states and 25563 transitions. [2021-06-05 15:09:13,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:13,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:13,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:14,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:14,166 INFO L430 AbstractCegarLoop]: === Iteration 252 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:14,166 INFO L82 PathProgramCache]: Analyzing trace with hash -328552440, now seen corresponding path program 39 times [2021-06-05 15:09:14,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:14,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481718697] [2021-06-05 15:09:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:14,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:14,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481718697] [2021-06-05 15:09:14,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481718697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:14,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937565456] [2021-06-05 15:09:14,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:14,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:09:14,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:14,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:14,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:14,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:14,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:14,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:14,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 15:09:14,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:14,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:14,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:14,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:92 [2021-06-05 15:09:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:14,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937565456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:14,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:14,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:09:14,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067453470] [2021-06-05 15:09:14,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:14,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:14,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:14,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:14,728 INFO L87 Difference]: Start difference. First operand 5722 states and 25563 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:16,166 INFO L93 Difference]: Finished difference Result 6202 states and 27330 transitions. [2021-06-05 15:09:16,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:09:16,166 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:16,180 INFO L225 Difference]: With dead ends: 6202 [2021-06-05 15:09:16,181 INFO L226 Difference]: Without dead ends: 6050 [2021-06-05 15:09:16,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1029.6ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:09:16,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6050 states. [2021-06-05 15:09:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6050 to 5713. [2021-06-05 15:09:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5713 states, 5712 states have (on average 4.4693627450980395) internal successors, (25529), 5712 states have internal predecessors, (25529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:16,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5713 states to 5713 states and 25529 transitions. [2021-06-05 15:09:16,280 INFO L78 Accepts]: Start accepts. Automaton has 5713 states and 25529 transitions. Word has length 30 [2021-06-05 15:09:16,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:16,280 INFO L482 AbstractCegarLoop]: Abstraction has 5713 states and 25529 transitions. [2021-06-05 15:09:16,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:16,281 INFO L276 IsEmpty]: Start isEmpty. Operand 5713 states and 25529 transitions. [2021-06-05 15:09:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:16,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:16,291 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:16,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable583 [2021-06-05 15:09:16,491 INFO L430 AbstractCegarLoop]: === Iteration 253 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:16,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:16,491 INFO L82 PathProgramCache]: Analyzing trace with hash 2032488358, now seen corresponding path program 40 times [2021-06-05 15:09:16,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:16,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278258782] [2021-06-05 15:09:16,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:16,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:16,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278258782] [2021-06-05 15:09:16,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278258782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:16,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340558485] [2021-06-05 15:09:16,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:16,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:16,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:16,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:16,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:16,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:16,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:16,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:16,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:09:16,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:16,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:16,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:16,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 15:09:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:17,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340558485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:17,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:17,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:09:17,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536383571] [2021-06-05 15:09:17,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:17,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:17,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:17,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:17,024 INFO L87 Difference]: Start difference. First operand 5713 states and 25529 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:18,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:18,308 INFO L93 Difference]: Finished difference Result 6411 states and 28241 transitions. [2021-06-05 15:09:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:09:18,308 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:18,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:18,324 INFO L225 Difference]: With dead ends: 6411 [2021-06-05 15:09:18,324 INFO L226 Difference]: Without dead ends: 6294 [2021-06-05 15:09:18,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 912.8ms TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:09:18,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2021-06-05 15:09:18,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 5707. [2021-06-05 15:09:18,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5707 states, 5706 states have (on average 4.470206799859796) internal successors, (25507), 5706 states have internal predecessors, (25507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5707 states to 5707 states and 25507 transitions. [2021-06-05 15:09:18,429 INFO L78 Accepts]: Start accepts. Automaton has 5707 states and 25507 transitions. Word has length 30 [2021-06-05 15:09:18,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:18,429 INFO L482 AbstractCegarLoop]: Abstraction has 5707 states and 25507 transitions. [2021-06-05 15:09:18,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:18,430 INFO L276 IsEmpty]: Start isEmpty. Operand 5707 states and 25507 transitions. [2021-06-05 15:09:18,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:18,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:18,440 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:18,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:18,640 INFO L430 AbstractCegarLoop]: === Iteration 254 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:18,641 INFO L82 PathProgramCache]: Analyzing trace with hash -782480168, now seen corresponding path program 41 times [2021-06-05 15:09:18,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:18,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712455633] [2021-06-05 15:09:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:18,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:18,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712455633] [2021-06-05 15:09:18,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712455633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:18,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358337075] [2021-06-05 15:09:18,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:18,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:18,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:18,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:18,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:18,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:18,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:18,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:18,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:09:18,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:18,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:18,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:18,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:09:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:19,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358337075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:19,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:19,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:09:19,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597330418] [2021-06-05 15:09:19,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:09:19,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:19,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:09:19,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:09:19,045 INFO L87 Difference]: Start difference. First operand 5707 states and 25507 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:20,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:20,059 INFO L93 Difference]: Finished difference Result 6203 states and 27399 transitions. [2021-06-05 15:09:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:09:20,059 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:20,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:20,074 INFO L225 Difference]: With dead ends: 6203 [2021-06-05 15:09:20,074 INFO L226 Difference]: Without dead ends: 6105 [2021-06-05 15:09:20,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 709.1ms TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:09:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6105 states. [2021-06-05 15:09:20,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6105 to 5737. [2021-06-05 15:09:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5737 states, 5736 states have (on average 4.466352859135286) internal successors, (25619), 5736 states have internal predecessors, (25619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5737 states to 5737 states and 25619 transitions. [2021-06-05 15:09:20,182 INFO L78 Accepts]: Start accepts. Automaton has 5737 states and 25619 transitions. Word has length 30 [2021-06-05 15:09:20,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:20,182 INFO L482 AbstractCegarLoop]: Abstraction has 5737 states and 25619 transitions. [2021-06-05 15:09:20,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:20,182 INFO L276 IsEmpty]: Start isEmpty. Operand 5737 states and 25619 transitions. [2021-06-05 15:09:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:20,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:20,193 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:20,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:20,393 INFO L430 AbstractCegarLoop]: === Iteration 255 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:20,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:20,394 INFO L82 PathProgramCache]: Analyzing trace with hash 743590910, now seen corresponding path program 42 times [2021-06-05 15:09:20,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:20,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760602172] [2021-06-05 15:09:20,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:20,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:20,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760602172] [2021-06-05 15:09:20,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760602172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:20,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068794352] [2021-06-05 15:09:20,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:20,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:09:20,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:20,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:20,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:20,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:20,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:20,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:09:20,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:20,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:20,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:20,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:09:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:20,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068794352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:20,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:20,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:09:20,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282049318] [2021-06-05 15:09:20,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:09:20,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:20,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:09:20,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:09:20,952 INFO L87 Difference]: Start difference. First operand 5737 states and 25619 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:21,761 INFO L93 Difference]: Finished difference Result 6229 states and 27484 transitions. [2021-06-05 15:09:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:09:21,762 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:21,775 INFO L225 Difference]: With dead ends: 6229 [2021-06-05 15:09:21,776 INFO L226 Difference]: Without dead ends: 6126 [2021-06-05 15:09:21,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 699.8ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:09:21,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2021-06-05 15:09:21,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 5729. [2021-06-05 15:09:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5729 states, 5728 states have (on average 4.466655027932961) internal successors, (25585), 5728 states have internal predecessors, (25585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5729 states to 5729 states and 25585 transitions. [2021-06-05 15:09:21,868 INFO L78 Accepts]: Start accepts. Automaton has 5729 states and 25585 transitions. Word has length 30 [2021-06-05 15:09:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:21,869 INFO L482 AbstractCegarLoop]: Abstraction has 5729 states and 25585 transitions. [2021-06-05 15:09:21,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 5729 states and 25585 transitions. [2021-06-05 15:09:21,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:21,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:21,879 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:22,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:22,090 INFO L430 AbstractCegarLoop]: === Iteration 256 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:22,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:22,091 INFO L82 PathProgramCache]: Analyzing trace with hash 961883838, now seen corresponding path program 43 times [2021-06-05 15:09:22,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:22,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523162911] [2021-06-05 15:09:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:22,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:22,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523162911] [2021-06-05 15:09:22,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523162911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:22,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536025571] [2021-06-05 15:09:22,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:22,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:22,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:22,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:22,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:22,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:22,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:09:22,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:22,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:22,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:22,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:09:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:22,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536025571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:22,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:22,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:09:22,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852322464] [2021-06-05 15:09:22,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:09:22,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:22,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:09:22,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:09:22,509 INFO L87 Difference]: Start difference. First operand 5729 states and 25585 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:23,406 INFO L93 Difference]: Finished difference Result 6078 states and 26904 transitions. [2021-06-05 15:09:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:09:23,408 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:23,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:23,423 INFO L225 Difference]: With dead ends: 6078 [2021-06-05 15:09:23,423 INFO L226 Difference]: Without dead ends: 5980 [2021-06-05 15:09:23,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 560.6ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:09:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5980 states. [2021-06-05 15:09:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5980 to 5738. [2021-06-05 15:09:23,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5738 states, 5737 states have (on average 4.465225727732264) internal successors, (25617), 5737 states have internal predecessors, (25617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:23,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5738 states to 5738 states and 25617 transitions. [2021-06-05 15:09:23,572 INFO L78 Accepts]: Start accepts. Automaton has 5738 states and 25617 transitions. Word has length 30 [2021-06-05 15:09:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:23,572 INFO L482 AbstractCegarLoop]: Abstraction has 5738 states and 25617 transitions. [2021-06-05 15:09:23,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 5738 states and 25617 transitions. [2021-06-05 15:09:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:23,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:23,583 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:23,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:23,784 INFO L430 AbstractCegarLoop]: === Iteration 257 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1582367904, now seen corresponding path program 44 times [2021-06-05 15:09:23,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:23,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656201827] [2021-06-05 15:09:23,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:23,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:23,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656201827] [2021-06-05 15:09:23,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656201827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:23,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134256511] [2021-06-05 15:09:23,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:23,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:23,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:23,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:23,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:24,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:24,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:24,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:24,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 15:09:24,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:24,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:24,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:24,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:95 [2021-06-05 15:09:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:24,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134256511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:24,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:24,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:09:24,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710307920] [2021-06-05 15:09:24,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:24,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:24,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:24,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:24,350 INFO L87 Difference]: Start difference. First operand 5738 states and 25617 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:25,773 INFO L93 Difference]: Finished difference Result 6201 states and 27306 transitions. [2021-06-05 15:09:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:09:25,773 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:25,788 INFO L225 Difference]: With dead ends: 6201 [2021-06-05 15:09:25,788 INFO L226 Difference]: Without dead ends: 6049 [2021-06-05 15:09:25,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1085.0ms TimeCoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:09:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6049 states. [2021-06-05 15:09:25,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6049 to 5729. [2021-06-05 15:09:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5729 states, 5728 states have (on average 4.466305865921788) internal successors, (25583), 5728 states have internal predecessors, (25583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5729 states to 5729 states and 25583 transitions. [2021-06-05 15:09:25,894 INFO L78 Accepts]: Start accepts. Automaton has 5729 states and 25583 transitions. Word has length 30 [2021-06-05 15:09:25,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:25,894 INFO L482 AbstractCegarLoop]: Abstraction has 5729 states and 25583 transitions. [2021-06-05 15:09:25,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5729 states and 25583 transitions. [2021-06-05 15:09:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:25,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:25,904 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:26,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:26,105 INFO L430 AbstractCegarLoop]: === Iteration 258 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:26,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:26,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1941336736, now seen corresponding path program 45 times [2021-06-05 15:09:26,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:26,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476959432] [2021-06-05 15:09:26,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:26,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:26,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476959432] [2021-06-05 15:09:26,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476959432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:26,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715286659] [2021-06-05 15:09:26,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:26,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:09:26,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:26,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:26,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:26,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:26,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:26,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:26,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 15:09:26,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:26,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:26,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:26,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:95 [2021-06-05 15:09:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:26,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715286659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:26,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:26,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:09:26,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954369299] [2021-06-05 15:09:26,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:26,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:26,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:26,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:26,708 INFO L87 Difference]: Start difference. First operand 5729 states and 25583 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:26,999 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-06-05 15:09:27,196 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-06-05 15:09:28,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:28,613 INFO L93 Difference]: Finished difference Result 6459 states and 28255 transitions. [2021-06-05 15:09:28,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:09:28,613 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:28,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:28,629 INFO L225 Difference]: With dead ends: 6459 [2021-06-05 15:09:28,629 INFO L226 Difference]: Without dead ends: 6216 [2021-06-05 15:09:28,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1623.6ms TimeCoverageRelationStatistics Valid=409, Invalid=1847, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:09:28,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6216 states. [2021-06-05 15:09:28,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6216 to 5732. [2021-06-05 15:09:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5732 states, 5731 states have (on average 4.4660617693247255) internal successors, (25595), 5731 states have internal predecessors, (25595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5732 states to 5732 states and 25595 transitions. [2021-06-05 15:09:28,734 INFO L78 Accepts]: Start accepts. Automaton has 5732 states and 25595 transitions. Word has length 30 [2021-06-05 15:09:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:28,734 INFO L482 AbstractCegarLoop]: Abstraction has 5732 states and 25595 transitions. [2021-06-05 15:09:28,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 5732 states and 25595 transitions. [2021-06-05 15:09:28,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:28,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:28,744 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:28,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 15:09:28,944 INFO L430 AbstractCegarLoop]: === Iteration 259 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:28,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:28,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1717163706, now seen corresponding path program 46 times [2021-06-05 15:09:28,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:28,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186940247] [2021-06-05 15:09:28,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:29,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:29,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186940247] [2021-06-05 15:09:29,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186940247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:29,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537234897] [2021-06-05 15:09:29,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:29,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:29,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:29,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:29,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:29,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:29,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:29,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:29,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:09:29,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:29,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:29,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:29,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:09:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:29,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537234897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:29,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:29,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:09:29,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870501494] [2021-06-05 15:09:29,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:09:29,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:29,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:09:29,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:09:29,361 INFO L87 Difference]: Start difference. First operand 5732 states and 25595 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:30,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:30,116 INFO L93 Difference]: Finished difference Result 6207 states and 27408 transitions. [2021-06-05 15:09:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:09:30,116 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:30,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:30,131 INFO L225 Difference]: With dead ends: 6207 [2021-06-05 15:09:30,131 INFO L226 Difference]: Without dead ends: 6090 [2021-06-05 15:09:30,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 534.6ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:09:30,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6090 states. [2021-06-05 15:09:30,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6090 to 5727. [2021-06-05 15:09:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5727 states, 5726 states have (on average 4.466294097100943) internal successors, (25574), 5726 states have internal predecessors, (25574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5727 states to 5727 states and 25574 transitions. [2021-06-05 15:09:30,237 INFO L78 Accepts]: Start accepts. Automaton has 5727 states and 25574 transitions. Word has length 30 [2021-06-05 15:09:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:30,237 INFO L482 AbstractCegarLoop]: Abstraction has 5727 states and 25574 transitions. [2021-06-05 15:09:30,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:30,237 INFO L276 IsEmpty]: Start isEmpty. Operand 5727 states and 25574 transitions. [2021-06-05 15:09:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:30,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:30,251 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:30,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:30,457 INFO L430 AbstractCegarLoop]: === Iteration 260 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:30,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:30,457 INFO L82 PathProgramCache]: Analyzing trace with hash 853148546, now seen corresponding path program 9 times [2021-06-05 15:09:30,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:30,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147476074] [2021-06-05 15:09:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:09:30,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:30,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147476074] [2021-06-05 15:09:30,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147476074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:30,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217869557] [2021-06-05 15:09:30,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:30,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:09:30,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:30,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:30,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:30,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:30,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:30,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:30,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:09:30,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:30,853 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-05 15:09:30,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:30,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-05 15:09:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:30,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217869557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:30,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:30,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 15:09:30,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115049762] [2021-06-05 15:09:30,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:30,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:30,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:30,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:30,880 INFO L87 Difference]: Start difference. First operand 5727 states and 25574 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:31,532 INFO L93 Difference]: Finished difference Result 6110 states and 26993 transitions. [2021-06-05 15:09:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:09:31,533 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:31,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:31,549 INFO L225 Difference]: With dead ends: 6110 [2021-06-05 15:09:31,549 INFO L226 Difference]: Without dead ends: 6015 [2021-06-05 15:09:31,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:09:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6015 states. [2021-06-05 15:09:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6015 to 5738. [2021-06-05 15:09:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5738 states, 5737 states have (on average 4.466620184765557) internal successors, (25625), 5737 states have internal predecessors, (25625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5738 states to 5738 states and 25625 transitions. [2021-06-05 15:09:31,656 INFO L78 Accepts]: Start accepts. Automaton has 5738 states and 25625 transitions. Word has length 30 [2021-06-05 15:09:31,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:31,656 INFO L482 AbstractCegarLoop]: Abstraction has 5738 states and 25625 transitions. [2021-06-05 15:09:31,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:31,656 INFO L276 IsEmpty]: Start isEmpty. Operand 5738 states and 25625 transitions. [2021-06-05 15:09:31,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:31,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:31,666 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:31,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:31,867 INFO L430 AbstractCegarLoop]: === Iteration 261 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:31,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:31,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1718803998, now seen corresponding path program 47 times [2021-06-05 15:09:31,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:31,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314330598] [2021-06-05 15:09:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:32,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:32,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314330598] [2021-06-05 15:09:32,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314330598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:32,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793690959] [2021-06-05 15:09:32,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:32,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:32,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:32,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:32,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:32,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:32,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:32,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:32,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:32,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 15:09:32,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:09:32,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:32,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:32,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:36 [2021-06-05 15:09:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:32,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793690959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:32,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:32,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 15:09:32,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943291717] [2021-06-05 15:09:32,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:32,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:32,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:32,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:32,443 INFO L87 Difference]: Start difference. First operand 5738 states and 25625 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:34,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:34,024 INFO L93 Difference]: Finished difference Result 6121 states and 27027 transitions. [2021-06-05 15:09:34,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:09:34,024 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:34,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:34,038 INFO L225 Difference]: With dead ends: 6121 [2021-06-05 15:09:34,038 INFO L226 Difference]: Without dead ends: 6019 [2021-06-05 15:09:34,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1259.2ms TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:09:34,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6019 states. [2021-06-05 15:09:34,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6019 to 5740. [2021-06-05 15:09:34,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5740 states, 5739 states have (on average 4.466806063774177) internal successors, (25635), 5739 states have internal predecessors, (25635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5740 states to 5740 states and 25635 transitions. [2021-06-05 15:09:34,144 INFO L78 Accepts]: Start accepts. Automaton has 5740 states and 25635 transitions. Word has length 30 [2021-06-05 15:09:34,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:34,144 INFO L482 AbstractCegarLoop]: Abstraction has 5740 states and 25635 transitions. [2021-06-05 15:09:34,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 5740 states and 25635 transitions. [2021-06-05 15:09:34,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:34,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:34,157 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:34,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-06-05 15:09:34,381 INFO L430 AbstractCegarLoop]: === Iteration 262 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:34,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:34,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1721578654, now seen corresponding path program 48 times [2021-06-05 15:09:34,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:34,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747418412] [2021-06-05 15:09:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:34,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:34,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747418412] [2021-06-05 15:09:34,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747418412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:34,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175165967] [2021-06-05 15:09:34,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:34,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:09:34,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:34,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:34,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:34,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:34,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:34,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:09:34,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:34,888 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-05 15:09:34,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:34,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:14 [2021-06-05 15:09:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:34,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175165967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:34,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:34,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 15:09:34,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750612359] [2021-06-05 15:09:34,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:34,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:34,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:34,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:34,951 INFO L87 Difference]: Start difference. First operand 5740 states and 25635 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:36,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:36,474 INFO L93 Difference]: Finished difference Result 6420 states and 28190 transitions. [2021-06-05 15:09:36,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:09:36,474 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:36,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:36,491 INFO L225 Difference]: With dead ends: 6420 [2021-06-05 15:09:36,491 INFO L226 Difference]: Without dead ends: 6313 [2021-06-05 15:09:36,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1110.3ms TimeCoverageRelationStatistics Valid=348, Invalid=1632, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:09:36,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6313 states. [2021-06-05 15:09:36,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6313 to 5758. [2021-06-05 15:09:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5758 states, 5757 states have (on average 4.463088414104568) internal successors, (25694), 5757 states have internal predecessors, (25694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5758 states to 5758 states and 25694 transitions. [2021-06-05 15:09:36,603 INFO L78 Accepts]: Start accepts. Automaton has 5758 states and 25694 transitions. Word has length 30 [2021-06-05 15:09:36,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:36,603 INFO L482 AbstractCegarLoop]: Abstraction has 5758 states and 25694 transitions. [2021-06-05 15:09:36,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 5758 states and 25694 transitions. [2021-06-05 15:09:36,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:36,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:36,613 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:36,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:36,814 INFO L430 AbstractCegarLoop]: === Iteration 263 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:36,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1215232388, now seen corresponding path program 49 times [2021-06-05 15:09:36,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:36,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171720284] [2021-06-05 15:09:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:36,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:36,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171720284] [2021-06-05 15:09:36,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171720284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:36,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670461521] [2021-06-05 15:09:36,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:37,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:37,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:37,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:37,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:37,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:37,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:09:37,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:37,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:37,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:37,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 15:09:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:37,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670461521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:37,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:37,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:09:37,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715660478] [2021-06-05 15:09:37,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:37,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:37,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:37,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:37,306 INFO L87 Difference]: Start difference. First operand 5758 states and 25694 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:38,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:38,394 INFO L93 Difference]: Finished difference Result 6348 states and 27971 transitions. [2021-06-05 15:09:38,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:09:38,394 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:38,409 INFO L225 Difference]: With dead ends: 6348 [2021-06-05 15:09:38,409 INFO L226 Difference]: Without dead ends: 6224 [2021-06-05 15:09:38,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 766.2ms TimeCoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:09:38,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6224 states. [2021-06-05 15:09:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6224 to 5746. [2021-06-05 15:09:38,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5746 states, 5745 states have (on average 4.464926022628372) internal successors, (25651), 5745 states have internal predecessors, (25651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5746 states to 5746 states and 25651 transitions. [2021-06-05 15:09:38,534 INFO L78 Accepts]: Start accepts. Automaton has 5746 states and 25651 transitions. Word has length 30 [2021-06-05 15:09:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:38,534 INFO L482 AbstractCegarLoop]: Abstraction has 5746 states and 25651 transitions. [2021-06-05 15:09:38,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:38,534 INFO L276 IsEmpty]: Start isEmpty. Operand 5746 states and 25651 transitions. [2021-06-05 15:09:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:38,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:38,544 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:38,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:38,744 INFO L430 AbstractCegarLoop]: === Iteration 264 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:38,745 INFO L82 PathProgramCache]: Analyzing trace with hash -216230256, now seen corresponding path program 56 times [2021-06-05 15:09:38,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:38,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035999894] [2021-06-05 15:09:38,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:38,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:38,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035999894] [2021-06-05 15:09:38,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035999894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:38,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647897649] [2021-06-05 15:09:38,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:38,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:38,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:38,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:38,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:39,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:39,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:39,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 15:09:39,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:09:39,186 INFO L628 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2021-06-05 15:09:39,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:39,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:61 [2021-06-05 15:09:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:39,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647897649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:39,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:39,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:09:39,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207740553] [2021-06-05 15:09:39,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:39,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:39,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:39,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:39,317 INFO L87 Difference]: Start difference. First operand 5746 states and 25651 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:41,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:41,950 INFO L93 Difference]: Finished difference Result 8399 states and 35866 transitions. [2021-06-05 15:09:41,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:09:41,951 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:41,970 INFO L225 Difference]: With dead ends: 8399 [2021-06-05 15:09:41,970 INFO L226 Difference]: Without dead ends: 8120 [2021-06-05 15:09:41,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1569.2ms TimeCoverageRelationStatistics Valid=362, Invalid=2500, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:09:41,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8120 states. [2021-06-05 15:09:42,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8120 to 6060. [2021-06-05 15:09:42,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 4.467073774550256) internal successors, (27066), 6059 states have internal predecessors, (27066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 27066 transitions. [2021-06-05 15:09:42,105 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 27066 transitions. Word has length 30 [2021-06-05 15:09:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:42,105 INFO L482 AbstractCegarLoop]: Abstraction has 6060 states and 27066 transitions. [2021-06-05 15:09:42,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:42,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 27066 transitions. [2021-06-05 15:09:42,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:42,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:42,116 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:42,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:42,317 INFO L430 AbstractCegarLoop]: === Iteration 265 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:42,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:42,317 INFO L82 PathProgramCache]: Analyzing trace with hash -926529414, now seen corresponding path program 50 times [2021-06-05 15:09:42,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:42,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578358430] [2021-06-05 15:09:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:42,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:42,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578358430] [2021-06-05 15:09:42,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578358430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:42,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624946615] [2021-06-05 15:09:42,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:42,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:42,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:42,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:42,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:42,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:42,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:42,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 15:09:42,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:09:42,852 INFO L628 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2021-06-05 15:09:42,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:42,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:61 [2021-06-05 15:09:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:42,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624946615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:42,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:42,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 15:09:42,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078260741] [2021-06-05 15:09:42,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:09:42,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:42,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:09:42,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:09:42,948 INFO L87 Difference]: Start difference. First operand 6060 states and 27066 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:44,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:44,617 INFO L93 Difference]: Finished difference Result 7041 states and 30836 transitions. [2021-06-05 15:09:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:09:44,617 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:44,635 INFO L225 Difference]: With dead ends: 7041 [2021-06-05 15:09:44,635 INFO L226 Difference]: Without dead ends: 6926 [2021-06-05 15:09:44,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1007.3ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:09:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6926 states. [2021-06-05 15:09:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6926 to 6044. [2021-06-05 15:09:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6044 states, 6043 states have (on average 4.467648518947542) internal successors, (26998), 6043 states have internal predecessors, (26998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6044 states to 6044 states and 26998 transitions. [2021-06-05 15:09:44,763 INFO L78 Accepts]: Start accepts. Automaton has 6044 states and 26998 transitions. Word has length 30 [2021-06-05 15:09:44,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:44,763 INFO L482 AbstractCegarLoop]: Abstraction has 6044 states and 26998 transitions. [2021-06-05 15:09:44,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 6044 states and 26998 transitions. [2021-06-05 15:09:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:44,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:44,774 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:44,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:44,974 INFO L430 AbstractCegarLoop]: === Iteration 266 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:44,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:44,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1191371828, now seen corresponding path program 57 times [2021-06-05 15:09:44,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:44,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719179700] [2021-06-05 15:09:44,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:45,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:45,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719179700] [2021-06-05 15:09:45,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719179700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:45,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056427688] [2021-06-05 15:09:45,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:45,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:09:45,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:45,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:45,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:45,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:45,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:45,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:09:45,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:45,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:45,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:45,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 15:09:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:45,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056427688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:45,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:45,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:09:45,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172663371] [2021-06-05 15:09:45,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:45,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:45,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:45,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:45,536 INFO L87 Difference]: Start difference. First operand 6044 states and 26998 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:48,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:48,520 INFO L93 Difference]: Finished difference Result 7932 states and 34063 transitions. [2021-06-05 15:09:48,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 15:09:48,520 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:48,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:48,539 INFO L225 Difference]: With dead ends: 7932 [2021-06-05 15:09:48,539 INFO L226 Difference]: Without dead ends: 7768 [2021-06-05 15:09:48,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1886.3ms TimeCoverageRelationStatistics Valid=495, Invalid=3665, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:09:48,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7768 states. [2021-06-05 15:09:48,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7768 to 6078. [2021-06-05 15:09:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6078 states, 6077 states have (on average 4.464867533322363) internal successors, (27133), 6077 states have internal predecessors, (27133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6078 states to 6078 states and 27133 transitions. [2021-06-05 15:09:48,681 INFO L78 Accepts]: Start accepts. Automaton has 6078 states and 27133 transitions. Word has length 30 [2021-06-05 15:09:48,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:48,681 INFO L482 AbstractCegarLoop]: Abstraction has 6078 states and 27133 transitions. [2021-06-05 15:09:48,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 6078 states and 27133 transitions. [2021-06-05 15:09:48,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:48,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:48,692 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:48,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 15:09:48,895 INFO L430 AbstractCegarLoop]: === Iteration 267 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:48,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1504898224, now seen corresponding path program 58 times [2021-06-05 15:09:48,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:48,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604733499] [2021-06-05 15:09:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:49,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:49,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604733499] [2021-06-05 15:09:49,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604733499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:49,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082132665] [2021-06-05 15:09:49,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:49,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:49,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:49,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:49,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:49,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:49,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:49,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:49,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:09:49,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:49,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:49,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:49,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:09:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:49,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082132665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:49,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:49,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:09:49,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016252878] [2021-06-05 15:09:49,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:09:49,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:49,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:09:49,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:09:49,328 INFO L87 Difference]: Start difference. First operand 6078 states and 27133 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:51,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:51,992 INFO L93 Difference]: Finished difference Result 8957 states and 38424 transitions. [2021-06-05 15:09:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:09:51,993 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:51,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:52,013 INFO L225 Difference]: With dead ends: 8957 [2021-06-05 15:09:52,013 INFO L226 Difference]: Without dead ends: 8810 [2021-06-05 15:09:52,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 1824.2ms TimeCoverageRelationStatistics Valid=721, Invalid=3971, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:09:52,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8810 states. [2021-06-05 15:09:52,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8810 to 6096. [2021-06-05 15:09:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6096 states, 6095 states have (on average 4.461197703035275) internal successors, (27191), 6095 states have internal predecessors, (27191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:52,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6096 states to 6096 states and 27191 transitions. [2021-06-05 15:09:52,161 INFO L78 Accepts]: Start accepts. Automaton has 6096 states and 27191 transitions. Word has length 30 [2021-06-05 15:09:52,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:52,161 INFO L482 AbstractCegarLoop]: Abstraction has 6096 states and 27191 transitions. [2021-06-05 15:09:52,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 6096 states and 27191 transitions. [2021-06-05 15:09:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:52,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:52,173 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:52,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-06-05 15:09:52,373 INFO L430 AbstractCegarLoop]: === Iteration 268 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:52,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:52,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1930569974, now seen corresponding path program 51 times [2021-06-05 15:09:52,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:52,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909878632] [2021-06-05 15:09:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:52,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:52,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909878632] [2021-06-05 15:09:52,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909878632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:52,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465458247] [2021-06-05 15:09:52,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:52,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:09:52,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:52,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:52,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:52,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:52,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:52,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:09:52,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:52,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:52,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:52,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 15:09:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:52,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465458247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:52,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:52,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 15:09:52,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916228929] [2021-06-05 15:09:52,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:09:52,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:52,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:09:52,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:09:52,954 INFO L87 Difference]: Start difference. First operand 6096 states and 27191 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:54,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:54,933 INFO L93 Difference]: Finished difference Result 6664 states and 29340 transitions. [2021-06-05 15:09:54,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:09:54,934 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:54,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:54,950 INFO L225 Difference]: With dead ends: 6664 [2021-06-05 15:09:54,950 INFO L226 Difference]: Without dead ends: 6575 [2021-06-05 15:09:54,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1223.9ms TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:09:54,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6575 states. [2021-06-05 15:09:55,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6575 to 6116. [2021-06-05 15:09:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 6115 states have (on average 4.4619787408013085) internal successors, (27285), 6115 states have internal predecessors, (27285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 27285 transitions. [2021-06-05 15:09:55,071 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 27285 transitions. Word has length 30 [2021-06-05 15:09:55,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:55,071 INFO L482 AbstractCegarLoop]: Abstraction has 6116 states and 27285 transitions. [2021-06-05 15:09:55,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 27285 transitions. [2021-06-05 15:09:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:55,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:55,082 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:55,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable636 [2021-06-05 15:09:55,283 INFO L430 AbstractCegarLoop]: === Iteration 269 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:55,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:55,283 INFO L82 PathProgramCache]: Analyzing trace with hash -529343608, now seen corresponding path program 52 times [2021-06-05 15:09:55,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:55,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373403503] [2021-06-05 15:09:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:55,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:55,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373403503] [2021-06-05 15:09:55,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373403503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:55,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623439394] [2021-06-05 15:09:55,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:55,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:55,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:55,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:55,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:55,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:55,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:55,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:55,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:09:55,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:55,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:55,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:55,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:09:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:55,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623439394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:55,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:55,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:09:55,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932077845] [2021-06-05 15:09:55,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:09:55,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:55,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:09:55,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:09:55,775 INFO L87 Difference]: Start difference. First operand 6116 states and 27285 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:57,358 INFO L93 Difference]: Finished difference Result 6827 states and 30058 transitions. [2021-06-05 15:09:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:09:57,359 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:57,375 INFO L225 Difference]: With dead ends: 6827 [2021-06-05 15:09:57,376 INFO L226 Difference]: Without dead ends: 6748 [2021-06-05 15:09:57,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1015.0ms TimeCoverageRelationStatistics Valid=194, Invalid=1366, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:09:57,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2021-06-05 15:09:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6108. [2021-06-05 15:09:57,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6108 states, 6107 states have (on average 4.460946454887834) internal successors, (27243), 6107 states have internal predecessors, (27243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6108 states to 6108 states and 27243 transitions. [2021-06-05 15:09:57,501 INFO L78 Accepts]: Start accepts. Automaton has 6108 states and 27243 transitions. Word has length 30 [2021-06-05 15:09:57,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:57,501 INFO L482 AbstractCegarLoop]: Abstraction has 6108 states and 27243 transitions. [2021-06-05 15:09:57,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 6108 states and 27243 transitions. [2021-06-05 15:09:57,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:57,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:57,512 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:57,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-05 15:09:57,713 INFO L430 AbstractCegarLoop]: === Iteration 270 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:57,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1474284956, now seen corresponding path program 53 times [2021-06-05 15:09:57,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:57,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816820278] [2021-06-05 15:09:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:57,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:57,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816820278] [2021-06-05 15:09:57,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816820278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:57,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233895108] [2021-06-05 15:09:57,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:57,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:57,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:57,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:58,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:58,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:58,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:58,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:09:58,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:58,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:58,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:58,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:09:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:58,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233895108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:58,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:58,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:09:58,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847615895] [2021-06-05 15:09:58,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:09:58,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:58,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:09:58,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:09:58,140 INFO L87 Difference]: Start difference. First operand 6108 states and 27243 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:59,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:59,666 INFO L93 Difference]: Finished difference Result 8391 states and 35817 transitions. [2021-06-05 15:09:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:09:59,666 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:09:59,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:59,683 INFO L225 Difference]: With dead ends: 8391 [2021-06-05 15:09:59,683 INFO L226 Difference]: Without dead ends: 8248 [2021-06-05 15:09:59,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 938.7ms TimeCoverageRelationStatistics Valid=360, Invalid=1802, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:09:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8248 states. [2021-06-05 15:09:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8248 to 6108. [2021-06-05 15:09:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6108 states, 6107 states have (on average 4.460291468806288) internal successors, (27239), 6107 states have internal predecessors, (27239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6108 states to 6108 states and 27239 transitions. [2021-06-05 15:09:59,813 INFO L78 Accepts]: Start accepts. Automaton has 6108 states and 27239 transitions. Word has length 30 [2021-06-05 15:09:59,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:59,813 INFO L482 AbstractCegarLoop]: Abstraction has 6108 states and 27239 transitions. [2021-06-05 15:09:59,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:59,813 INFO L276 IsEmpty]: Start isEmpty. Operand 6108 states and 27239 transitions. [2021-06-05 15:09:59,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:09:59,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:59,824 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:00,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-05 15:10:00,029 INFO L430 AbstractCegarLoop]: === Iteration 271 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:00,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:00,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1322558186, now seen corresponding path program 59 times [2021-06-05 15:10:00,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:00,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244224006] [2021-06-05 15:10:00,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:00,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:00,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244224006] [2021-06-05 15:10:00,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244224006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:00,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148322347] [2021-06-05 15:10:00,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:00,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:10:00,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:00,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:00,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:00,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:00,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:00,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:00,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 15:10:00,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:00,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:00,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:00,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 15:10:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:00,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148322347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:00,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:00,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:10:00,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586596370] [2021-06-05 15:10:00,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:00,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:00,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:00,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:00,466 INFO L87 Difference]: Start difference. First operand 6108 states and 27239 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:01,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:01,720 INFO L93 Difference]: Finished difference Result 7064 states and 30882 transitions. [2021-06-05 15:10:01,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:10:01,721 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:01,742 INFO L225 Difference]: With dead ends: 7064 [2021-06-05 15:10:01,742 INFO L226 Difference]: Without dead ends: 6990 [2021-06-05 15:10:01,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 633.7ms TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:10:01,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6990 states. [2021-06-05 15:10:01,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6990 to 6134. [2021-06-05 15:10:01,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6134 states, 6133 states have (on average 4.458666231860427) internal successors, (27345), 6133 states have internal predecessors, (27345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:01,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6134 states to 6134 states and 27345 transitions. [2021-06-05 15:10:01,881 INFO L78 Accepts]: Start accepts. Automaton has 6134 states and 27345 transitions. Word has length 30 [2021-06-05 15:10:01,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:01,881 INFO L482 AbstractCegarLoop]: Abstraction has 6134 states and 27345 transitions. [2021-06-05 15:10:01,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:01,881 INFO L276 IsEmpty]: Start isEmpty. Operand 6134 states and 27345 transitions. [2021-06-05 15:10:01,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:01,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:01,892 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:02,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:02,093 INFO L430 AbstractCegarLoop]: === Iteration 272 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:02,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:02,093 INFO L82 PathProgramCache]: Analyzing trace with hash 612259028, now seen corresponding path program 54 times [2021-06-05 15:10:02,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:02,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669240146] [2021-06-05 15:10:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:02,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:02,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669240146] [2021-06-05 15:10:02,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669240146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:02,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36872255] [2021-06-05 15:10:02,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:02,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:10:02,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:02,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:02,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:02,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:02,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:02,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 15:10:02,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:10:02,542 INFO L628 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2021-06-05 15:10:02,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:02,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:61 [2021-06-05 15:10:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:02,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36872255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:02,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:02,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 15:10:02,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491550331] [2021-06-05 15:10:02,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:10:02,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:02,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:10:02,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:10:02,636 INFO L87 Difference]: Start difference. First operand 6134 states and 27345 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:04,251 INFO L93 Difference]: Finished difference Result 7237 states and 31521 transitions. [2021-06-05 15:10:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:10:04,252 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:04,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:04,270 INFO L225 Difference]: With dead ends: 7237 [2021-06-05 15:10:04,270 INFO L226 Difference]: Without dead ends: 7122 [2021-06-05 15:10:04,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1086.4ms TimeCoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:10:04,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2021-06-05 15:10:04,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 6116. [2021-06-05 15:10:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 6115 states have (on average 4.459689288634506) internal successors, (27271), 6115 states have internal predecessors, (27271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 27271 transitions. [2021-06-05 15:10:04,403 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 27271 transitions. Word has length 30 [2021-06-05 15:10:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:04,403 INFO L482 AbstractCegarLoop]: Abstraction has 6116 states and 27271 transitions. [2021-06-05 15:10:04,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:04,404 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 27271 transitions. [2021-06-05 15:10:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:04,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:04,415 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:04,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable644 [2021-06-05 15:10:04,616 INFO L430 AbstractCegarLoop]: === Iteration 273 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:04,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1832674602, now seen corresponding path program 60 times [2021-06-05 15:10:04,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:04,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432633080] [2021-06-05 15:10:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:04,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:04,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432633080] [2021-06-05 15:10:04,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432633080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:04,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519397498] [2021-06-05 15:10:04,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:04,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:10:04,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:04,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:04,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:04,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:04,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:04,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:10:04,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:05,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:05,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:05,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:10:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:05,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519397498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:05,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:05,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 15:10:05,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655630006] [2021-06-05 15:10:05,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:05,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:05,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:05,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:05,032 INFO L87 Difference]: Start difference. First operand 6116 states and 27271 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:06,114 INFO L93 Difference]: Finished difference Result 6828 states and 30008 transitions. [2021-06-05 15:10:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:10:06,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:06,132 INFO L225 Difference]: With dead ends: 6828 [2021-06-05 15:10:06,132 INFO L226 Difference]: Without dead ends: 6755 [2021-06-05 15:10:06,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 677.2ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:10:06,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6755 states. [2021-06-05 15:10:06,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6755 to 6124. [2021-06-05 15:10:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6124 states, 6123 states have (on average 4.458762044749306) internal successors, (27301), 6123 states have internal predecessors, (27301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6124 states to 6124 states and 27301 transitions. [2021-06-05 15:10:06,259 INFO L78 Accepts]: Start accepts. Automaton has 6124 states and 27301 transitions. Word has length 30 [2021-06-05 15:10:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:06,259 INFO L482 AbstractCegarLoop]: Abstraction has 6124 states and 27301 transitions. [2021-06-05 15:10:06,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:06,259 INFO L276 IsEmpty]: Start isEmpty. Operand 6124 states and 27301 transitions. [2021-06-05 15:10:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:06,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:06,270 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:06,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-05 15:10:06,471 INFO L430 AbstractCegarLoop]: === Iteration 274 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:06,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:06,471 INFO L82 PathProgramCache]: Analyzing trace with hash 849814126, now seen corresponding path program 61 times [2021-06-05 15:10:06,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:06,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889248100] [2021-06-05 15:10:06,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:06,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:06,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889248100] [2021-06-05 15:10:06,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889248100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:06,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71602560] [2021-06-05 15:10:06,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:06,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:06,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:06,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:06,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:06,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:06,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:10:06,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:06,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:06,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:06,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:10:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:06,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71602560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:06,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:06,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 15:10:06,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765388864] [2021-06-05 15:10:06,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:06,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:06,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:06,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:06,993 INFO L87 Difference]: Start difference. First operand 6124 states and 27301 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:08,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:08,092 INFO L93 Difference]: Finished difference Result 6823 states and 29985 transitions. [2021-06-05 15:10:08,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:10:08,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:08,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:08,109 INFO L225 Difference]: With dead ends: 6823 [2021-06-05 15:10:08,109 INFO L226 Difference]: Without dead ends: 6748 [2021-06-05 15:10:08,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 746.9ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:10:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2021-06-05 15:10:08,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6119. [2021-06-05 15:10:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6119 states, 6118 states have (on average 4.459790781301079) internal successors, (27285), 6118 states have internal predecessors, (27285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6119 states to 6119 states and 27285 transitions. [2021-06-05 15:10:08,235 INFO L78 Accepts]: Start accepts. Automaton has 6119 states and 27285 transitions. Word has length 30 [2021-06-05 15:10:08,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:08,235 INFO L482 AbstractCegarLoop]: Abstraction has 6119 states and 27285 transitions. [2021-06-05 15:10:08,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:08,235 INFO L276 IsEmpty]: Start isEmpty. Operand 6119 states and 27285 transitions. [2021-06-05 15:10:08,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:08,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:08,247 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:08,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-05 15:10:08,447 INFO L430 AbstractCegarLoop]: === Iteration 275 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:08,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:08,447 INFO L82 PathProgramCache]: Analyzing trace with hash -7297126, now seen corresponding path program 55 times [2021-06-05 15:10:08,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:08,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209595250] [2021-06-05 15:10:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:08,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:08,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209595250] [2021-06-05 15:10:08,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209595250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:08,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137140332] [2021-06-05 15:10:08,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:08,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:08,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:08,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:08,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:08,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:08,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:10:08,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:08,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:08,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:08,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 15:10:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:08,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137140332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:08,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:08,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 15:10:08,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039510157] [2021-06-05 15:10:08,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:08,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:08,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:08,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:08,843 INFO L87 Difference]: Start difference. First operand 6119 states and 27285 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:11,247 INFO L93 Difference]: Finished difference Result 8811 states and 37531 transitions. [2021-06-05 15:10:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:10:11,247 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:11,268 INFO L225 Difference]: With dead ends: 8811 [2021-06-05 15:10:11,268 INFO L226 Difference]: Without dead ends: 8663 [2021-06-05 15:10:11,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1362.5ms TimeCoverageRelationStatistics Valid=463, Invalid=2293, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:10:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8663 states. [2021-06-05 15:10:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8663 to 6142. [2021-06-05 15:10:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6142 states, 6141 states have (on average 4.4583943983064644) internal successors, (27379), 6141 states have internal predecessors, (27379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:11,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6142 states to 6142 states and 27379 transitions. [2021-06-05 15:10:11,414 INFO L78 Accepts]: Start accepts. Automaton has 6142 states and 27379 transitions. Word has length 30 [2021-06-05 15:10:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:11,414 INFO L482 AbstractCegarLoop]: Abstraction has 6142 states and 27379 transitions. [2021-06-05 15:10:11,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:11,415 INFO L276 IsEmpty]: Start isEmpty. Operand 6142 states and 27379 transitions. [2021-06-05 15:10:11,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:11,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:11,425 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:11,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-05 15:10:11,626 INFO L430 AbstractCegarLoop]: === Iteration 276 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:11,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:11,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1758731406, now seen corresponding path program 56 times [2021-06-05 15:10:11,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:11,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821520159] [2021-06-05 15:10:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:11,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:11,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821520159] [2021-06-05 15:10:11,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821520159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:11,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739470153] [2021-06-05 15:10:11,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:11,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:11,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:11,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:11,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:11,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:11,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:11,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:10:11,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:12,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:12,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:12,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 15:10:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:12,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739470153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:12,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:12,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 15:10:12,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105336879] [2021-06-05 15:10:12,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:12,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:12,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:12,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:12,077 INFO L87 Difference]: Start difference. First operand 6142 states and 27379 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:14,700 INFO L93 Difference]: Finished difference Result 9223 states and 39019 transitions. [2021-06-05 15:10:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:10:14,700 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:14,722 INFO L225 Difference]: With dead ends: 9223 [2021-06-05 15:10:14,723 INFO L226 Difference]: Without dead ends: 9081 [2021-06-05 15:10:14,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1594.4ms TimeCoverageRelationStatistics Valid=494, Invalid=2698, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:10:14,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9081 states. [2021-06-05 15:10:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9081 to 6132. [2021-06-05 15:10:14,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 4.458326537269613) internal successors, (27334), 6131 states have internal predecessors, (27334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 27334 transitions. [2021-06-05 15:10:14,879 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 27334 transitions. Word has length 30 [2021-06-05 15:10:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:14,879 INFO L482 AbstractCegarLoop]: Abstraction has 6132 states and 27334 transitions. [2021-06-05 15:10:14,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 27334 transitions. [2021-06-05 15:10:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:14,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:14,890 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:15,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-06-05 15:10:15,091 INFO L430 AbstractCegarLoop]: === Iteration 277 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:15,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1275770602, now seen corresponding path program 62 times [2021-06-05 15:10:15,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:15,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392465674] [2021-06-05 15:10:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:15,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:15,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392465674] [2021-06-05 15:10:15,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392465674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:15,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602855006] [2021-06-05 15:10:15,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:15,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:15,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:15,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:15,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:15,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:15,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:15,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:10:15,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:15,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:15,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:15,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-05 15:10:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:15,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602855006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:15,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:15,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:10:15,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924424925] [2021-06-05 15:10:15,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:10:15,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:15,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:10:15,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:10:15,681 INFO L87 Difference]: Start difference. First operand 6132 states and 27334 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:18,828 INFO L93 Difference]: Finished difference Result 7499 states and 32440 transitions. [2021-06-05 15:10:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:10:18,829 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:18,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:18,848 INFO L225 Difference]: With dead ends: 7499 [2021-06-05 15:10:18,848 INFO L226 Difference]: Without dead ends: 7343 [2021-06-05 15:10:18,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 2025.7ms TimeCoverageRelationStatistics Valid=350, Invalid=2842, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:10:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7343 states. [2021-06-05 15:10:18,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7343 to 6154. [2021-06-05 15:10:18,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6154 states, 6153 states have (on average 4.457012839265399) internal successors, (27424), 6153 states have internal predecessors, (27424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:18,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6154 states to 6154 states and 27424 transitions. [2021-06-05 15:10:18,985 INFO L78 Accepts]: Start accepts. Automaton has 6154 states and 27424 transitions. Word has length 30 [2021-06-05 15:10:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:18,985 INFO L482 AbstractCegarLoop]: Abstraction has 6154 states and 27424 transitions. [2021-06-05 15:10:18,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:18,985 INFO L276 IsEmpty]: Start isEmpty. Operand 6154 states and 27424 transitions. [2021-06-05 15:10:18,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:18,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:18,997 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:19,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable656 [2021-06-05 15:10:19,197 INFO L430 AbstractCegarLoop]: === Iteration 278 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:19,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:19,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1589296998, now seen corresponding path program 63 times [2021-06-05 15:10:19,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:19,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115647224] [2021-06-05 15:10:19,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:19,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:19,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115647224] [2021-06-05 15:10:19,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115647224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:19,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085536571] [2021-06-05 15:10:19,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:19,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:10:19,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:19,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:19,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:19,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:19,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:19,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:10:19,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:19,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:19,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:19,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-05 15:10:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:19,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085536571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:19,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:19,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:10:19,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599936118] [2021-06-05 15:10:19,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:10:19,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:19,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:10:19,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:10:19,772 INFO L87 Difference]: Start difference. First operand 6154 states and 27424 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:23,085 INFO L93 Difference]: Finished difference Result 7689 states and 33388 transitions. [2021-06-05 15:10:23,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:10:23,085 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:23,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:23,104 INFO L225 Difference]: With dead ends: 7689 [2021-06-05 15:10:23,104 INFO L226 Difference]: Without dead ends: 7493 [2021-06-05 15:10:23,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2433.6ms TimeCoverageRelationStatistics Valid=498, Invalid=3662, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:10:23,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7493 states. [2021-06-05 15:10:23,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7493 to 6150. [2021-06-05 15:10:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6150 states, 6149 states have (on average 4.457635387867946) internal successors, (27410), 6149 states have internal predecessors, (27410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:23,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6150 states to 6150 states and 27410 transitions. [2021-06-05 15:10:23,237 INFO L78 Accepts]: Start accepts. Automaton has 6150 states and 27410 transitions. Word has length 30 [2021-06-05 15:10:23,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:23,237 INFO L482 AbstractCegarLoop]: Abstraction has 6150 states and 27410 transitions. [2021-06-05 15:10:23,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:23,237 INFO L276 IsEmpty]: Start isEmpty. Operand 6150 states and 27410 transitions. [2021-06-05 15:10:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:23,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:23,249 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:23,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-05 15:10:23,449 INFO L430 AbstractCegarLoop]: === Iteration 279 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:23,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:23,449 INFO L82 PathProgramCache]: Analyzing trace with hash 20793724, now seen corresponding path program 64 times [2021-06-05 15:10:23,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:23,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110207535] [2021-06-05 15:10:23,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:23,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:23,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110207535] [2021-06-05 15:10:23,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110207535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:23,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249665960] [2021-06-05 15:10:23,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:23,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:23,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:23,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:23,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:23,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:23,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:23,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:10:23,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:23,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:23,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:23,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:10:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:23,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249665960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:23,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:23,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:10:23,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088337868] [2021-06-05 15:10:23,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:23,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:23,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:23,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:23,980 INFO L87 Difference]: Start difference. First operand 6150 states and 27410 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:25,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:25,360 INFO L93 Difference]: Finished difference Result 6822 states and 30013 transitions. [2021-06-05 15:10:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:10:25,360 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:25,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:25,377 INFO L225 Difference]: With dead ends: 6822 [2021-06-05 15:10:25,378 INFO L226 Difference]: Without dead ends: 6749 [2021-06-05 15:10:25,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1021.5ms TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:10:25,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6749 states. [2021-06-05 15:10:25,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6749 to 6148. [2021-06-05 15:10:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 6147 states have (on average 4.455994794208557) internal successors, (27391), 6147 states have internal predecessors, (27391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:25,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 27391 transitions. [2021-06-05 15:10:25,509 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 27391 transitions. Word has length 30 [2021-06-05 15:10:25,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:25,509 INFO L482 AbstractCegarLoop]: Abstraction has 6148 states and 27391 transitions. [2021-06-05 15:10:25,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 27391 transitions. [2021-06-05 15:10:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:25,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:25,521 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:25,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:25,721 INFO L430 AbstractCegarLoop]: === Iteration 280 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:25,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:25,722 INFO L82 PathProgramCache]: Analyzing trace with hash 685196466, now seen corresponding path program 65 times [2021-06-05 15:10:25,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:25,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690795242] [2021-06-05 15:10:25,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:25,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:25,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690795242] [2021-06-05 15:10:25,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690795242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:25,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659213997] [2021-06-05 15:10:25,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:26,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:10:26,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:26,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:26,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:26,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:26,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:26,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:26,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:26,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 15:10:26,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:26,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:26,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:26,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:123 [2021-06-05 15:10:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:26,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659213997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:26,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:26,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 15:10:26,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47694005] [2021-06-05 15:10:26,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:10:26,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:26,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:10:26,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:10:26,310 INFO L87 Difference]: Start difference. First operand 6148 states and 27391 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:27,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:27,718 INFO L93 Difference]: Finished difference Result 7068 states and 31105 transitions. [2021-06-05 15:10:27,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:10:27,718 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:27,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:27,735 INFO L225 Difference]: With dead ends: 7068 [2021-06-05 15:10:27,735 INFO L226 Difference]: Without dead ends: 7010 [2021-06-05 15:10:27,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 996.5ms TimeCoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:10:27,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7010 states. [2021-06-05 15:10:27,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7010 to 6148. [2021-06-05 15:10:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 6147 states have (on average 4.45566943224337) internal successors, (27389), 6147 states have internal predecessors, (27389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:27,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 27389 transitions. [2021-06-05 15:10:27,858 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 27389 transitions. Word has length 30 [2021-06-05 15:10:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:27,858 INFO L482 AbstractCegarLoop]: Abstraction has 6148 states and 27389 transitions. [2021-06-05 15:10:27,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 27389 transitions. [2021-06-05 15:10:27,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:27,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:27,870 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:28,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-06-05 15:10:28,070 INFO L430 AbstractCegarLoop]: === Iteration 281 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:28,071 INFO L82 PathProgramCache]: Analyzing trace with hash -2052023334, now seen corresponding path program 66 times [2021-06-05 15:10:28,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:28,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260456810] [2021-06-05 15:10:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:28,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:28,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260456810] [2021-06-05 15:10:28,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260456810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:28,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850601713] [2021-06-05 15:10:28,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:28,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:10:28,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:28,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:10:28,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:28,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:28,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:28,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:28,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:10:28,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:28,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:28,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:28,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-05 15:10:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:28,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850601713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:28,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:28,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:10:28,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315284833] [2021-06-05 15:10:28,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:28,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:28,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:28,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:28,736 INFO L87 Difference]: Start difference. First operand 6148 states and 27389 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:29,388 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 15:10:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:31,977 INFO L93 Difference]: Finished difference Result 7306 states and 32083 transitions. [2021-06-05 15:10:31,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 15:10:31,978 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:31,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:31,995 INFO L225 Difference]: With dead ends: 7306 [2021-06-05 15:10:31,995 INFO L226 Difference]: Without dead ends: 7225 [2021-06-05 15:10:31,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 2652.1ms TimeCoverageRelationStatistics Valid=717, Invalid=4395, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:10:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7225 states. [2021-06-05 15:10:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7225 to 6147. [2021-06-05 15:10:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6147 states, 6146 states have (on average 4.455906280507647) internal successors, (27386), 6146 states have internal predecessors, (27386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:32,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6147 states to 6147 states and 27386 transitions. [2021-06-05 15:10:32,151 INFO L78 Accepts]: Start accepts. Automaton has 6147 states and 27386 transitions. Word has length 30 [2021-06-05 15:10:32,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:32,151 INFO L482 AbstractCegarLoop]: Abstraction has 6147 states and 27386 transitions. [2021-06-05 15:10:32,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:32,151 INFO L276 IsEmpty]: Start isEmpty. Operand 6147 states and 27386 transitions. [2021-06-05 15:10:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:32,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:32,163 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:32,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable673,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:32,364 INFO L430 AbstractCegarLoop]: === Iteration 282 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:32,364 INFO L82 PathProgramCache]: Analyzing trace with hash -698006990, now seen corresponding path program 67 times [2021-06-05 15:10:32,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:32,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026701106] [2021-06-05 15:10:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:32,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:32,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026701106] [2021-06-05 15:10:32,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026701106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:32,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359102082] [2021-06-05 15:10:32,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:32,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:32,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:32,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:32,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:32,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:32,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:10:32,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:32,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:32,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:32,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:10:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:32,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359102082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:32,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:32,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:10:32,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624439277] [2021-06-05 15:10:32,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:10:32,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:32,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:10:32,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:10:32,810 INFO L87 Difference]: Start difference. First operand 6147 states and 27386 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:36,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:36,275 INFO L93 Difference]: Finished difference Result 8629 states and 37333 transitions. [2021-06-05 15:10:36,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 15:10:36,276 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:36,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:36,295 INFO L225 Difference]: With dead ends: 8629 [2021-06-05 15:10:36,296 INFO L226 Difference]: Without dead ends: 8516 [2021-06-05 15:10:36,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 2742.2ms TimeCoverageRelationStatistics Valid=858, Invalid=5148, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:10:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8516 states. [2021-06-05 15:10:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8516 to 6169. [2021-06-05 15:10:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6169 states, 6168 states have (on average 4.454604409857328) internal successors, (27476), 6168 states have internal predecessors, (27476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6169 states to 6169 states and 27476 transitions. [2021-06-05 15:10:36,429 INFO L78 Accepts]: Start accepts. Automaton has 6169 states and 27476 transitions. Word has length 30 [2021-06-05 15:10:36,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:36,430 INFO L482 AbstractCegarLoop]: Abstraction has 6169 states and 27476 transitions. [2021-06-05 15:10:36,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:36,430 INFO L276 IsEmpty]: Start isEmpty. Operand 6169 states and 27476 transitions. [2021-06-05 15:10:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:36,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:36,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:36,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-06-05 15:10:36,642 INFO L430 AbstractCegarLoop]: === Iteration 283 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:36,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1837669644, now seen corresponding path program 68 times [2021-06-05 15:10:36,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:36,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337407862] [2021-06-05 15:10:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:36,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:36,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337407862] [2021-06-05 15:10:36,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337407862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:36,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542731292] [2021-06-05 15:10:36,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:36,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:36,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:36,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:36,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:37,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:37,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:37,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:10:37,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:37,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:37,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:37,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-05 15:10:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:37,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542731292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:37,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:37,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:10:37,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881136419] [2021-06-05 15:10:37,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:10:37,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:37,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:10:37,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:10:37,320 INFO L87 Difference]: Start difference. First operand 6169 states and 27476 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:39,294 INFO L93 Difference]: Finished difference Result 6941 states and 30277 transitions. [2021-06-05 15:10:39,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:10:39,294 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:39,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:39,311 INFO L225 Difference]: With dead ends: 6941 [2021-06-05 15:10:39,311 INFO L226 Difference]: Without dead ends: 6779 [2021-06-05 15:10:39,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1476.8ms TimeCoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:10:39,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2021-06-05 15:10:39,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6160. [2021-06-05 15:10:39,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6159 states have (on average 4.455431076473453) internal successors, (27441), 6159 states have internal predecessors, (27441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 27441 transitions. [2021-06-05 15:10:39,442 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 27441 transitions. Word has length 30 [2021-06-05 15:10:39,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:39,442 INFO L482 AbstractCegarLoop]: Abstraction has 6160 states and 27441 transitions. [2021-06-05 15:10:39,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:39,442 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 27441 transitions. [2021-06-05 15:10:39,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:39,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:39,454 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:39,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:39,655 INFO L430 AbstractCegarLoop]: === Iteration 284 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:39,655 INFO L82 PathProgramCache]: Analyzing trace with hash -910007654, now seen corresponding path program 57 times [2021-06-05 15:10:39,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:39,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473881766] [2021-06-05 15:10:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:39,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:39,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473881766] [2021-06-05 15:10:39,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473881766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:39,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666507425] [2021-06-05 15:10:39,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:39,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:10:39,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:39,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:39,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:40,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:40,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:40,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:10:40,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:40,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:40,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:40,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-05 15:10:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:40,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666507425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:40,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:40,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 15:10:40,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455404118] [2021-06-05 15:10:40,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:10:40,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:40,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:10:40,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:10:40,299 INFO L87 Difference]: Start difference. First operand 6160 states and 27441 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:41,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:41,927 INFO L93 Difference]: Finished difference Result 6629 states and 29196 transitions. [2021-06-05 15:10:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:10:41,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:41,943 INFO L225 Difference]: With dead ends: 6629 [2021-06-05 15:10:41,943 INFO L226 Difference]: Without dead ends: 6540 [2021-06-05 15:10:41,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1242.1ms TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:10:41,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6540 states. [2021-06-05 15:10:42,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6540 to 6186. [2021-06-05 15:10:42,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6186 states, 6185 states have (on average 4.454324979789814) internal successors, (27550), 6185 states have internal predecessors, (27550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6186 states to 6186 states and 27550 transitions. [2021-06-05 15:10:42,069 INFO L78 Accepts]: Start accepts. Automaton has 6186 states and 27550 transitions. Word has length 30 [2021-06-05 15:10:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:42,069 INFO L482 AbstractCegarLoop]: Abstraction has 6186 states and 27550 transitions. [2021-06-05 15:10:42,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6186 states and 27550 transitions. [2021-06-05 15:10:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:42,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:42,081 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:42,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-06-05 15:10:42,282 INFO L430 AbstractCegarLoop]: === Iteration 285 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:42,282 INFO L82 PathProgramCache]: Analyzing trace with hash 925046060, now seen corresponding path program 58 times [2021-06-05 15:10:42,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:42,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689268552] [2021-06-05 15:10:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:42,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:42,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689268552] [2021-06-05 15:10:42,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689268552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:42,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570759848] [2021-06-05 15:10:42,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:42,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:42,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:42,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:42,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:42,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:42,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:42,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:42,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:10:42,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:42,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:42,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:42,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:10:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:42,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570759848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:42,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:42,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:10:42,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082376675] [2021-06-05 15:10:42,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:10:42,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:42,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:10:42,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:10:42,780 INFO L87 Difference]: Start difference. First operand 6186 states and 27550 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:44,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:44,438 INFO L93 Difference]: Finished difference Result 6821 states and 30008 transitions. [2021-06-05 15:10:44,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:10:44,438 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:44,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:44,453 INFO L225 Difference]: With dead ends: 6821 [2021-06-05 15:10:44,453 INFO L226 Difference]: Without dead ends: 6742 [2021-06-05 15:10:44,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1114.3ms TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:10:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6742 states. [2021-06-05 15:10:44,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6742 to 6176. [2021-06-05 15:10:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6176 states, 6175 states have (on average 4.4550607287449395) internal successors, (27510), 6175 states have internal predecessors, (27510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6176 states to 6176 states and 27510 transitions. [2021-06-05 15:10:44,565 INFO L78 Accepts]: Start accepts. Automaton has 6176 states and 27510 transitions. Word has length 30 [2021-06-05 15:10:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:44,565 INFO L482 AbstractCegarLoop]: Abstraction has 6176 states and 27510 transitions. [2021-06-05 15:10:44,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 6176 states and 27510 transitions. [2021-06-05 15:10:44,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:44,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:44,576 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:44,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-06-05 15:10:44,776 INFO L430 AbstractCegarLoop]: === Iteration 286 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:44,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:44,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1366292672, now seen corresponding path program 59 times [2021-06-05 15:10:44,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:44,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992612658] [2021-06-05 15:10:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:44,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:44,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992612658] [2021-06-05 15:10:44,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992612658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:44,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565248420] [2021-06-05 15:10:44,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:44,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:44,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:44,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:44,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:45,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:45,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:45,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:45,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:10:45,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:45,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:45,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:45,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:10:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:45,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565248420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:45,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:45,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:10:45,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453616287] [2021-06-05 15:10:45,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:45,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:45,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:45,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:45,197 INFO L87 Difference]: Start difference. First operand 6176 states and 27510 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:46,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:46,719 INFO L93 Difference]: Finished difference Result 7622 states and 33107 transitions. [2021-06-05 15:10:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:10:46,720 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:46,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:46,738 INFO L225 Difference]: With dead ends: 7622 [2021-06-05 15:10:46,738 INFO L226 Difference]: Without dead ends: 7543 [2021-06-05 15:10:46,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1030.7ms TimeCoverageRelationStatistics Valid=353, Invalid=1999, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:10:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7543 states. [2021-06-05 15:10:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7543 to 6181. [2021-06-05 15:10:46,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6181 states, 6180 states have (on average 4.454368932038835) internal successors, (27528), 6180 states have internal predecessors, (27528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 27528 transitions. [2021-06-05 15:10:46,877 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 27528 transitions. Word has length 30 [2021-06-05 15:10:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:46,877 INFO L482 AbstractCegarLoop]: Abstraction has 6181 states and 27528 transitions. [2021-06-05 15:10:46,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 27528 transitions. [2021-06-05 15:10:46,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:46,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:46,889 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:47,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:47,090 INFO L430 AbstractCegarLoop]: === Iteration 287 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:47,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:47,090 INFO L82 PathProgramCache]: Analyzing trace with hash 386556672, now seen corresponding path program 60 times [2021-06-05 15:10:47,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:47,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036289675] [2021-06-05 15:10:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:47,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:47,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036289675] [2021-06-05 15:10:47,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036289675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:47,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782131727] [2021-06-05 15:10:47,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:47,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:10:47,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:47,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:47,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:47,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:47,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:47,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:47,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:10:47,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:47,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:47,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:47,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-06-05 15:10:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:47,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782131727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:47,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:47,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 15:10:47,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631786116] [2021-06-05 15:10:47,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:47,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:47,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:47,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:47,709 INFO L87 Difference]: Start difference. First operand 6181 states and 27528 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:49,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:49,981 INFO L93 Difference]: Finished difference Result 7514 states and 32843 transitions. [2021-06-05 15:10:49,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:10:49,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:49,998 INFO L225 Difference]: With dead ends: 7514 [2021-06-05 15:10:49,999 INFO L226 Difference]: Without dead ends: 7425 [2021-06-05 15:10:49,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1730.2ms TimeCoverageRelationStatistics Valid=432, Invalid=2990, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:10:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7425 states. [2021-06-05 15:10:50,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7425 to 6191. [2021-06-05 15:10:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6191 states, 6190 states have (on average 4.452665589660743) internal successors, (27562), 6190 states have internal predecessors, (27562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6191 states to 6191 states and 27562 transitions. [2021-06-05 15:10:50,117 INFO L78 Accepts]: Start accepts. Automaton has 6191 states and 27562 transitions. Word has length 30 [2021-06-05 15:10:50,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:50,118 INFO L482 AbstractCegarLoop]: Abstraction has 6191 states and 27562 transitions. [2021-06-05 15:10:50,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 6191 states and 27562 transitions. [2021-06-05 15:10:50,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:50,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:50,129 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:50,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:50,329 INFO L430 AbstractCegarLoop]: === Iteration 288 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:50,329 INFO L82 PathProgramCache]: Analyzing trace with hash 774116114, now seen corresponding path program 61 times [2021-06-05 15:10:50,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:50,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841003469] [2021-06-05 15:10:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:50,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:50,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841003469] [2021-06-05 15:10:50,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841003469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:50,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722514225] [2021-06-05 15:10:50,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:50,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:50,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:50,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:50,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:50,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:50,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:10:50,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:50,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:50,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:50,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:10:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:50,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722514225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:50,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:50,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:10:50,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602504032] [2021-06-05 15:10:50,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:10:50,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:50,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:10:50,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:10:50,765 INFO L87 Difference]: Start difference. First operand 6191 states and 27562 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:52,462 INFO L93 Difference]: Finished difference Result 7645 states and 33130 transitions. [2021-06-05 15:10:52,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:10:52,463 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:52,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:52,480 INFO L225 Difference]: With dead ends: 7645 [2021-06-05 15:10:52,480 INFO L226 Difference]: Without dead ends: 7570 [2021-06-05 15:10:52,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1184.7ms TimeCoverageRelationStatistics Valid=363, Invalid=1707, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:10:52,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7570 states. [2021-06-05 15:10:52,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7570 to 6189. [2021-06-05 15:10:52,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6189 states, 6188 states have (on average 4.453458306399483) internal successors, (27558), 6188 states have internal predecessors, (27558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:52,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6189 states to 6189 states and 27558 transitions. [2021-06-05 15:10:52,608 INFO L78 Accepts]: Start accepts. Automaton has 6189 states and 27558 transitions. Word has length 30 [2021-06-05 15:10:52,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:52,609 INFO L482 AbstractCegarLoop]: Abstraction has 6189 states and 27558 transitions. [2021-06-05 15:10:52,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:52,609 INFO L276 IsEmpty]: Start isEmpty. Operand 6189 states and 27558 transitions. [2021-06-05 15:10:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:52,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:52,620 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:52,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable696,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:52,820 INFO L430 AbstractCegarLoop]: === Iteration 289 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:52,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:52,820 INFO L82 PathProgramCache]: Analyzing trace with hash 134499218, now seen corresponding path program 62 times [2021-06-05 15:10:52,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:52,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005367094] [2021-06-05 15:10:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:52,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:52,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005367094] [2021-06-05 15:10:52,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005367094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:52,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820509366] [2021-06-05 15:10:52,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:53,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:53,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:53,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:53,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:53,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:53,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:53,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:10:53,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:53,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:53,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:53,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-05 15:10:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:53,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820509366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:53,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:53,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 15:10:53,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933817720] [2021-06-05 15:10:53,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:53,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:53,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:53,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:53,281 INFO L87 Difference]: Start difference. First operand 6189 states and 27558 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:54,788 INFO L93 Difference]: Finished difference Result 7210 states and 31489 transitions. [2021-06-05 15:10:54,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:10:54,789 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:54,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:54,848 INFO L225 Difference]: With dead ends: 7210 [2021-06-05 15:10:54,848 INFO L226 Difference]: Without dead ends: 7144 [2021-06-05 15:10:54,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1166.6ms TimeCoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:10:54,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2021-06-05 15:10:54,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 6187. [2021-06-05 15:10:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6187 states, 6186 states have (on average 4.45328160362108) internal successors, (27548), 6186 states have internal predecessors, (27548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6187 states to 6187 states and 27548 transitions. [2021-06-05 15:10:54,962 INFO L78 Accepts]: Start accepts. Automaton has 6187 states and 27548 transitions. Word has length 30 [2021-06-05 15:10:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:54,962 INFO L482 AbstractCegarLoop]: Abstraction has 6187 states and 27548 transitions. [2021-06-05 15:10:54,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 6187 states and 27548 transitions. [2021-06-05 15:10:54,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:54,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:54,973 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:55,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-05 15:10:55,174 INFO L430 AbstractCegarLoop]: === Iteration 290 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:55,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:55,174 INFO L82 PathProgramCache]: Analyzing trace with hash 2015091668, now seen corresponding path program 63 times [2021-06-05 15:10:55,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:55,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903404475] [2021-06-05 15:10:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:55,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:55,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903404475] [2021-06-05 15:10:55,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903404475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:55,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470780910] [2021-06-05 15:10:55,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:55,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:10:55,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:55,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:55,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:55,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:55,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:10:55,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:55,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:55,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:55,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-05 15:10:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:55,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470780910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:55,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:55,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:10:55,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132261232] [2021-06-05 15:10:55,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:10:55,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:55,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:10:55,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:10:55,736 INFO L87 Difference]: Start difference. First operand 6187 states and 27548 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:58,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:58,082 INFO L93 Difference]: Finished difference Result 7679 states and 33223 transitions. [2021-06-05 15:10:58,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:10:58,082 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:10:58,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:58,100 INFO L225 Difference]: With dead ends: 7679 [2021-06-05 15:10:58,100 INFO L226 Difference]: Without dead ends: 7537 [2021-06-05 15:10:58,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1835.3ms TimeCoverageRelationStatistics Valid=444, Invalid=2526, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:10:58,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7537 states. [2021-06-05 15:10:58,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7537 to 6184. [2021-06-05 15:10:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6184 states, 6183 states have (on average 4.453986737829533) internal successors, (27539), 6183 states have internal predecessors, (27539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6184 states to 6184 states and 27539 transitions. [2021-06-05 15:10:58,225 INFO L78 Accepts]: Start accepts. Automaton has 6184 states and 27539 transitions. Word has length 30 [2021-06-05 15:10:58,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:58,225 INFO L482 AbstractCegarLoop]: Abstraction has 6184 states and 27539 transitions. [2021-06-05 15:10:58,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:58,226 INFO L276 IsEmpty]: Start isEmpty. Operand 6184 states and 27539 transitions. [2021-06-05 15:10:58,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:10:58,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:58,237 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:58,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-06-05 15:10:58,437 INFO L430 AbstractCegarLoop]: === Iteration 291 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:58,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:58,437 INFO L82 PathProgramCache]: Analyzing trace with hash -417734958, now seen corresponding path program 64 times [2021-06-05 15:10:58,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:58,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081411376] [2021-06-05 15:10:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:58,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:58,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081411376] [2021-06-05 15:10:58,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081411376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:58,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146688102] [2021-06-05 15:10:58,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:58,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:58,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:58,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:58,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:58,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:58,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:58,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:58,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:10:58,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:58,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:58,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:58,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:10:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:58,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146688102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:58,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:58,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:10:58,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189996225] [2021-06-05 15:10:58,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:10:58,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:58,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:10:58,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:10:58,891 INFO L87 Difference]: Start difference. First operand 6184 states and 27539 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:01,382 INFO L93 Difference]: Finished difference Result 8478 states and 36592 transitions. [2021-06-05 15:11:01,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 15:11:01,382 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:01,401 INFO L225 Difference]: With dead ends: 8478 [2021-06-05 15:11:01,401 INFO L226 Difference]: Without dead ends: 8379 [2021-06-05 15:11:01,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1781.5ms TimeCoverageRelationStatistics Valid=808, Invalid=4162, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 15:11:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8379 states. [2021-06-05 15:11:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8379 to 6193. [2021-06-05 15:11:01,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6193 states, 6192 states have (on average 4.452519379844961) internal successors, (27570), 6192 states have internal predecessors, (27570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:01,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6193 states to 6193 states and 27570 transitions. [2021-06-05 15:11:01,538 INFO L78 Accepts]: Start accepts. Automaton has 6193 states and 27570 transitions. Word has length 30 [2021-06-05 15:11:01,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:01,539 INFO L482 AbstractCegarLoop]: Abstraction has 6193 states and 27570 transitions. [2021-06-05 15:11:01,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:01,539 INFO L276 IsEmpty]: Start isEmpty. Operand 6193 states and 27570 transitions. [2021-06-05 15:11:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:01,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:01,550 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:01,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:01,751 INFO L430 AbstractCegarLoop]: === Iteration 292 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:01,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1054201812, now seen corresponding path program 65 times [2021-06-05 15:11:01,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:01,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007208861] [2021-06-05 15:11:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:01,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:01,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007208861] [2021-06-05 15:11:01,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007208861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:01,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521408663] [2021-06-05 15:11:01,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:01,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:01,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:01,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:01,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:02,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:02,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:11:02,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:11:02,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 15:11:02,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:02,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:02,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:02,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 15:11:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:02,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521408663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:02,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:02,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:11:02,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350702331] [2021-06-05 15:11:02,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:11:02,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:02,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:11:02,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:11:02,213 INFO L87 Difference]: Start difference. First operand 6193 states and 27570 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:05,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:05,321 INFO L93 Difference]: Finished difference Result 9040 states and 38619 transitions. [2021-06-05 15:11:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 15:11:05,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:05,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:05,341 INFO L225 Difference]: With dead ends: 9040 [2021-06-05 15:11:05,342 INFO L226 Difference]: Without dead ends: 8912 [2021-06-05 15:11:05,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1857 ImplicationChecksByTransitivity, 2218.7ms TimeCoverageRelationStatistics Valid=935, Invalid=4917, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:11:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8912 states. [2021-06-05 15:11:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8912 to 6176. [2021-06-05 15:11:05,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6176 states, 6175 states have (on average 4.4526315789473685) internal successors, (27495), 6175 states have internal predecessors, (27495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6176 states to 6176 states and 27495 transitions. [2021-06-05 15:11:05,484 INFO L78 Accepts]: Start accepts. Automaton has 6176 states and 27495 transitions. Word has length 30 [2021-06-05 15:11:05,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:05,484 INFO L482 AbstractCegarLoop]: Abstraction has 6176 states and 27495 transitions. [2021-06-05 15:11:05,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:05,485 INFO L276 IsEmpty]: Start isEmpty. Operand 6176 states and 27495 transitions. [2021-06-05 15:11:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:05,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:05,496 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:05,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:05,696 INFO L430 AbstractCegarLoop]: === Iteration 293 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:05,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:05,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1828374158, now seen corresponding path program 69 times [2021-06-05 15:11:05,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:05,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725817765] [2021-06-05 15:11:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:05,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:05,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725817765] [2021-06-05 15:11:05,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725817765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:05,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350506550] [2021-06-05 15:11:05,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:05,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:11:05,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:05,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:05,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:06,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:06,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:11:06,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:06,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:06,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:06,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:11:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:06,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350506550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:06,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:06,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:11:06,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003117139] [2021-06-05 15:11:06,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:06,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:06,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:06,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:06,172 INFO L87 Difference]: Start difference. First operand 6176 states and 27495 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:09,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:09,571 INFO L93 Difference]: Finished difference Result 11312 states and 47496 transitions. [2021-06-05 15:11:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 15:11:09,571 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:09,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:09,596 INFO L225 Difference]: With dead ends: 11312 [2021-06-05 15:11:09,597 INFO L226 Difference]: Without dead ends: 11039 [2021-06-05 15:11:09,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2035 ImplicationChecksByTransitivity, 2185.6ms TimeCoverageRelationStatistics Valid=773, Invalid=5389, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:11:09,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11039 states. [2021-06-05 15:11:09,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11039 to 6578. [2021-06-05 15:11:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6578 states, 6577 states have (on average 4.472555876539456) internal successors, (29416), 6577 states have internal predecessors, (29416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6578 states to 6578 states and 29416 transitions. [2021-06-05 15:11:09,805 INFO L78 Accepts]: Start accepts. Automaton has 6578 states and 29416 transitions. Word has length 30 [2021-06-05 15:11:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:09,805 INFO L482 AbstractCegarLoop]: Abstraction has 6578 states and 29416 transitions. [2021-06-05 15:11:09,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 6578 states and 29416 transitions. [2021-06-05 15:11:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:09,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:09,817 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:10,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:10,017 INFO L430 AbstractCegarLoop]: === Iteration 294 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:10,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:10,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1756293980, now seen corresponding path program 66 times [2021-06-05 15:11:10,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:10,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455555878] [2021-06-05 15:11:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:10,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:10,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455555878] [2021-06-05 15:11:10,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455555878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:10,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477492211] [2021-06-05 15:11:10,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:10,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:11:10,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:10,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:10,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:10,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:10,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:11:10,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:10,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:10,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:10,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:11:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:10,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477492211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:10,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:10,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:11:10,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693682989] [2021-06-05 15:11:10,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:11:10,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:10,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:11:10,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:11:10,432 INFO L87 Difference]: Start difference. First operand 6578 states and 29416 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:13,265 INFO L93 Difference]: Finished difference Result 12152 states and 50932 transitions. [2021-06-05 15:11:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 15:11:13,265 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:13,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:13,292 INFO L225 Difference]: With dead ends: 12152 [2021-06-05 15:11:13,293 INFO L226 Difference]: Without dead ends: 11932 [2021-06-05 15:11:13,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 1708.2ms TimeCoverageRelationStatistics Valid=696, Invalid=4416, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:11:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11932 states. [2021-06-05 15:11:13,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11932 to 6892. [2021-06-05 15:11:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6892 states, 6891 states have (on average 4.462777535916413) internal successors, (30753), 6891 states have internal predecessors, (30753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6892 states to 6892 states and 30753 transitions. [2021-06-05 15:11:13,532 INFO L78 Accepts]: Start accepts. Automaton has 6892 states and 30753 transitions. Word has length 30 [2021-06-05 15:11:13,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:13,532 INFO L482 AbstractCegarLoop]: Abstraction has 6892 states and 30753 transitions. [2021-06-05 15:11:13,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:13,532 INFO L276 IsEmpty]: Start isEmpty. Operand 6892 states and 30753 transitions. [2021-06-05 15:11:13,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:13,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:13,545 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:13,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-06-05 15:11:13,745 INFO L430 AbstractCegarLoop]: === Iteration 295 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:13,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:13,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1491451566, now seen corresponding path program 70 times [2021-06-05 15:11:13,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:13,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871664549] [2021-06-05 15:11:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:13,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:13,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871664549] [2021-06-05 15:11:13,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871664549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:13,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920096602] [2021-06-05 15:11:13,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:13,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:13,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:13,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:13,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:14,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:14,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:14,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:14,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:14,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:14,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920096602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:14,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:14,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:11:14,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132359557] [2021-06-05 15:11:14,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:11:14,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:14,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:11:14,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:11:14,093 INFO L87 Difference]: Start difference. First operand 6892 states and 30753 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:16,487 INFO L93 Difference]: Finished difference Result 11628 states and 49138 transitions. [2021-06-05 15:11:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 15:11:16,488 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:16,514 INFO L225 Difference]: With dead ends: 11628 [2021-06-05 15:11:16,514 INFO L226 Difference]: Without dead ends: 11321 [2021-06-05 15:11:16,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 1717.8ms TimeCoverageRelationStatistics Valid=831, Invalid=4281, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:11:16,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11321 states. [2021-06-05 15:11:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11321 to 7001. [2021-06-05 15:11:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7001 states, 7000 states have (on average 4.461714285714286) internal successors, (31232), 7000 states have internal predecessors, (31232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:16,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7001 states to 7001 states and 31232 transitions. [2021-06-05 15:11:16,700 INFO L78 Accepts]: Start accepts. Automaton has 7001 states and 31232 transitions. Word has length 30 [2021-06-05 15:11:16,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:16,700 INFO L482 AbstractCegarLoop]: Abstraction has 7001 states and 31232 transitions. [2021-06-05 15:11:16,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:16,700 INFO L276 IsEmpty]: Start isEmpty. Operand 7001 states and 31232 transitions. [2021-06-05 15:11:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:16,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:16,712 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:16,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-06-05 15:11:16,913 INFO L430 AbstractCegarLoop]: === Iteration 296 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:16,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:16,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1177925170, now seen corresponding path program 71 times [2021-06-05 15:11:16,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:16,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934797024] [2021-06-05 15:11:16,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:17,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:17,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934797024] [2021-06-05 15:11:17,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934797024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:17,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980112195] [2021-06-05 15:11:17,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:17,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:11:17,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:17,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:17,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:17,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:17,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:17,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:17,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:17,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:17,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980112195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:17,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:17,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:11:17,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647256653] [2021-06-05 15:11:17,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:11:17,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:17,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:11:17,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:11:17,326 INFO L87 Difference]: Start difference. First operand 7001 states and 31232 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:20,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:20,183 INFO L93 Difference]: Finished difference Result 13958 states and 58073 transitions. [2021-06-05 15:11:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:11:20,184 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:20,215 INFO L225 Difference]: With dead ends: 13958 [2021-06-05 15:11:20,215 INFO L226 Difference]: Without dead ends: 13304 [2021-06-05 15:11:20,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 1980.5ms TimeCoverageRelationStatistics Valid=1137, Invalid=5025, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:11:20,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13304 states. [2021-06-05 15:11:20,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13304 to 7212. [2021-06-05 15:11:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7212 states, 7211 states have (on average 4.459159617251421) internal successors, (32155), 7211 states have internal predecessors, (32155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7212 states to 7212 states and 32155 transitions. [2021-06-05 15:11:20,425 INFO L78 Accepts]: Start accepts. Automaton has 7212 states and 32155 transitions. Word has length 30 [2021-06-05 15:11:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:20,425 INFO L482 AbstractCegarLoop]: Abstraction has 7212 states and 32155 transitions. [2021-06-05 15:11:20,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 7212 states and 32155 transitions. [2021-06-05 15:11:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:20,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:20,490 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:20,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:20,691 INFO L430 AbstractCegarLoop]: === Iteration 297 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:20,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:20,691 INFO L82 PathProgramCache]: Analyzing trace with hash 318426072, now seen corresponding path program 67 times [2021-06-05 15:11:20,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:20,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102073770] [2021-06-05 15:11:20,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:20,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:20,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102073770] [2021-06-05 15:11:20,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102073770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:20,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792977025] [2021-06-05 15:11:20,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:20,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:20,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:20,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:20,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:20,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:20,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:20,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:21,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792977025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:21,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:21,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:11:21,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026699439] [2021-06-05 15:11:21,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:11:21,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:21,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:11:21,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:11:21,022 INFO L87 Difference]: Start difference. First operand 7212 states and 32155 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:23,119 INFO L93 Difference]: Finished difference Result 11528 states and 48939 transitions. [2021-06-05 15:11:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:11:23,120 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:23,145 INFO L225 Difference]: With dead ends: 11528 [2021-06-05 15:11:23,145 INFO L226 Difference]: Without dead ends: 11278 [2021-06-05 15:11:23,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 1318.7ms TimeCoverageRelationStatistics Valid=655, Invalid=3127, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:11:23,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11278 states. [2021-06-05 15:11:23,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11278 to 7312. [2021-06-05 15:11:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7312 states, 7311 states have (on average 4.461906715907537) internal successors, (32621), 7311 states have internal predecessors, (32621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:23,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7312 states to 7312 states and 32621 transitions. [2021-06-05 15:11:23,330 INFO L78 Accepts]: Start accepts. Automaton has 7312 states and 32621 transitions. Word has length 30 [2021-06-05 15:11:23,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:23,330 INFO L482 AbstractCegarLoop]: Abstraction has 7312 states and 32621 transitions. [2021-06-05 15:11:23,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:23,330 INFO L276 IsEmpty]: Start isEmpty. Operand 7312 states and 32621 transitions. [2021-06-05 15:11:23,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:23,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:23,344 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:23,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:23,544 INFO L430 AbstractCegarLoop]: === Iteration 298 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:23,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:23,544 INFO L82 PathProgramCache]: Analyzing trace with hash -137858946, now seen corresponding path program 68 times [2021-06-05 15:11:23,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:23,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14259797] [2021-06-05 15:11:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:23,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:23,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14259797] [2021-06-05 15:11:23,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14259797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:23,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773374737] [2021-06-05 15:11:23,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:23,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:23,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:23,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:23,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:23,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:23,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:11:23,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:23,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:23,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:23,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:11:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:23,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773374737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:23,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:23,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 15:11:23,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884135407] [2021-06-05 15:11:23,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:11:23,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:23,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:11:23,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:11:23,908 INFO L87 Difference]: Start difference. First operand 7312 states and 32621 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:25,645 INFO L93 Difference]: Finished difference Result 11001 states and 46917 transitions. [2021-06-05 15:11:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:11:25,645 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:25,670 INFO L225 Difference]: With dead ends: 11001 [2021-06-05 15:11:25,670 INFO L226 Difference]: Without dead ends: 10911 [2021-06-05 15:11:25,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1087.7ms TimeCoverageRelationStatistics Valid=506, Invalid=2574, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:11:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10911 states. [2021-06-05 15:11:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10911 to 7322. [2021-06-05 15:11:25,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7322 states, 7321 states have (on average 4.461275781996995) internal successors, (32661), 7321 states have internal predecessors, (32661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7322 states to 7322 states and 32661 transitions. [2021-06-05 15:11:25,855 INFO L78 Accepts]: Start accepts. Automaton has 7322 states and 32661 transitions. Word has length 30 [2021-06-05 15:11:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:25,855 INFO L482 AbstractCegarLoop]: Abstraction has 7322 states and 32661 transitions. [2021-06-05 15:11:25,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 7322 states and 32661 transitions. [2021-06-05 15:11:25,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:25,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:25,868 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:26,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:26,068 INFO L430 AbstractCegarLoop]: === Iteration 299 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:26,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:26,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1812849596, now seen corresponding path program 72 times [2021-06-05 15:11:26,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:26,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729483794] [2021-06-05 15:11:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:26,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:26,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729483794] [2021-06-05 15:11:26,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729483794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:26,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298984813] [2021-06-05 15:11:26,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:26,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:11:26,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:26,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:26,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:26,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:26,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:11:26,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:26,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:26,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:26,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:11:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:26,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298984813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:26,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:26,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:11:26,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341853051] [2021-06-05 15:11:26,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:26,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:26,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:26,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:26,507 INFO L87 Difference]: Start difference. First operand 7322 states and 32661 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:28,478 INFO L93 Difference]: Finished difference Result 8866 states and 38516 transitions. [2021-06-05 15:11:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:11:28,478 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:28,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:28,498 INFO L225 Difference]: With dead ends: 8866 [2021-06-05 15:11:28,498 INFO L226 Difference]: Without dead ends: 8615 [2021-06-05 15:11:28,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 1454.5ms TimeCoverageRelationStatistics Valid=464, Invalid=2616, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:11:28,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8615 states. [2021-06-05 15:11:28,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8615 to 7345. [2021-06-05 15:11:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7345 states, 7344 states have (on average 4.459286492374727) internal successors, (32749), 7344 states have internal predecessors, (32749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7345 states to 7345 states and 32749 transitions. [2021-06-05 15:11:28,644 INFO L78 Accepts]: Start accepts. Automaton has 7345 states and 32749 transitions. Word has length 30 [2021-06-05 15:11:28,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:28,644 INFO L482 AbstractCegarLoop]: Abstraction has 7345 states and 32749 transitions. [2021-06-05 15:11:28,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:28,644 INFO L276 IsEmpty]: Start isEmpty. Operand 7345 states and 32749 transitions. [2021-06-05 15:11:28,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:28,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:28,657 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:28,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,290 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:28,857 INFO L430 AbstractCegarLoop]: === Iteration 300 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:28,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:28,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1499323200, now seen corresponding path program 73 times [2021-06-05 15:11:28,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:28,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846748467] [2021-06-05 15:11:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:29,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:29,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846748467] [2021-06-05 15:11:29,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846748467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:29,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063442628] [2021-06-05 15:11:29,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:29,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:29,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:29,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:29,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:29,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:29,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:29,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:29,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063442628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:29,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:29,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:11:29,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448517144] [2021-06-05 15:11:29,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:11:29,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:29,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:11:29,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:11:29,245 INFO L87 Difference]: Start difference. First operand 7345 states and 32749 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:30,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:30,923 INFO L93 Difference]: Finished difference Result 8966 states and 39123 transitions. [2021-06-05 15:11:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:11:30,923 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:30,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:30,943 INFO L225 Difference]: With dead ends: 8966 [2021-06-05 15:11:30,943 INFO L226 Difference]: Without dead ends: 8826 [2021-06-05 15:11:30,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1255.0ms TimeCoverageRelationStatistics Valid=508, Invalid=2248, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:11:30,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8826 states. [2021-06-05 15:11:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8826 to 7336. [2021-06-05 15:11:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7336 states, 7335 states have (on average 4.459713701431493) internal successors, (32712), 7335 states have internal predecessors, (32712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7336 states to 7336 states and 32712 transitions. [2021-06-05 15:11:31,160 INFO L78 Accepts]: Start accepts. Automaton has 7336 states and 32712 transitions. Word has length 30 [2021-06-05 15:11:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:31,160 INFO L482 AbstractCegarLoop]: Abstraction has 7336 states and 32712 transitions. [2021-06-05 15:11:31,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 7336 states and 32712 transitions. [2021-06-05 15:11:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:31,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:31,173 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:31,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable720,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:31,373 INFO L430 AbstractCegarLoop]: === Iteration 301 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:31,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:31,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1337074540, now seen corresponding path program 74 times [2021-06-05 15:11:31,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:31,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686629647] [2021-06-05 15:11:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:31,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:31,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686629647] [2021-06-05 15:11:31,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686629647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:31,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614684685] [2021-06-05 15:11:31,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:31,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:31,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:31,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:31,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:31,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:31,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:11:31,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:31,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:31,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:31,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 15:11:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:31,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614684685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:31,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:31,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:11:31,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601839521] [2021-06-05 15:11:31,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:31,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:31,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:31,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:31,814 INFO L87 Difference]: Start difference. First operand 7336 states and 32712 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:33,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:33,463 INFO L93 Difference]: Finished difference Result 9209 states and 39900 transitions. [2021-06-05 15:11:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:11:33,463 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:33,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:33,484 INFO L225 Difference]: With dead ends: 9209 [2021-06-05 15:11:33,484 INFO L226 Difference]: Without dead ends: 8927 [2021-06-05 15:11:33,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1184.1ms TimeCoverageRelationStatistics Valid=449, Invalid=2203, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:11:33,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8927 states. [2021-06-05 15:11:33,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8927 to 7346. [2021-06-05 15:11:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7346 states, 7345 states have (on average 4.458815520762424) internal successors, (32750), 7345 states have internal predecessors, (32750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7346 states to 7346 states and 32750 transitions. [2021-06-05 15:11:33,628 INFO L78 Accepts]: Start accepts. Automaton has 7346 states and 32750 transitions. Word has length 30 [2021-06-05 15:11:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:33,628 INFO L482 AbstractCegarLoop]: Abstraction has 7346 states and 32750 transitions. [2021-06-05 15:11:33,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 7346 states and 32750 transitions. [2021-06-05 15:11:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:33,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:33,641 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:33,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable721 [2021-06-05 15:11:33,841 INFO L430 AbstractCegarLoop]: === Iteration 302 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:33,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1392909568, now seen corresponding path program 27 times [2021-06-05 15:11:33,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:33,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715991784] [2021-06-05 15:11:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:34,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:34,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715991784] [2021-06-05 15:11:34,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715991784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:34,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181751170] [2021-06-05 15:11:34,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:34,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:11:34,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:34,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:34,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:34,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:11:34,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:34,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:34,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:34,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:11:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:34,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181751170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:34,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:34,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:11:34,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238812207] [2021-06-05 15:11:34,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:34,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:34,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:34,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:34,209 INFO L87 Difference]: Start difference. First operand 7346 states and 32750 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:35,712 INFO L93 Difference]: Finished difference Result 9450 states and 41039 transitions. [2021-06-05 15:11:35,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:11:35,712 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:35,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:35,733 INFO L225 Difference]: With dead ends: 9450 [2021-06-05 15:11:35,733 INFO L226 Difference]: Without dead ends: 9120 [2021-06-05 15:11:35,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 965.3ms TimeCoverageRelationStatistics Valid=500, Invalid=2256, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:11:35,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9120 states. [2021-06-05 15:11:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9120 to 7378. [2021-06-05 15:11:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7378 states, 7377 states have (on average 4.450318557679274) internal successors, (32830), 7377 states have internal predecessors, (32830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 32830 transitions. [2021-06-05 15:11:35,887 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 32830 transitions. Word has length 30 [2021-06-05 15:11:35,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:35,887 INFO L482 AbstractCegarLoop]: Abstraction has 7378 states and 32830 transitions. [2021-06-05 15:11:35,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:35,887 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 32830 transitions. [2021-06-05 15:11:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:35,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:35,900 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:36,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:36,101 INFO L430 AbstractCegarLoop]: === Iteration 303 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2097278532, now seen corresponding path program 28 times [2021-06-05 15:11:36,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:36,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936259847] [2021-06-05 15:11:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:36,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:36,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936259847] [2021-06-05 15:11:36,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936259847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:36,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730261098] [2021-06-05 15:11:36,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:36,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:36,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:36,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:36,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:36,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:36,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:36,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:36,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:36,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:36,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730261098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:36,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:36,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:11:36,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374774040] [2021-06-05 15:11:36,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:11:36,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:36,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:11:36,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:11:36,467 INFO L87 Difference]: Start difference. First operand 7378 states and 32830 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:37,878 INFO L93 Difference]: Finished difference Result 8987 states and 39143 transitions. [2021-06-05 15:11:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:11:37,878 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:37,899 INFO L225 Difference]: With dead ends: 8987 [2021-06-05 15:11:37,899 INFO L226 Difference]: Without dead ends: 8847 [2021-06-05 15:11:37,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1084.6ms TimeCoverageRelationStatistics Valid=363, Invalid=1707, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:11:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8847 states. [2021-06-05 15:11:38,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8847 to 7414. [2021-06-05 15:11:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7414 states, 7413 states have (on average 4.450290031026575) internal successors, (32990), 7413 states have internal predecessors, (32990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:38,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7414 states to 7414 states and 32990 transitions. [2021-06-05 15:11:38,053 INFO L78 Accepts]: Start accepts. Automaton has 7414 states and 32990 transitions. Word has length 30 [2021-06-05 15:11:38,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:38,053 INFO L482 AbstractCegarLoop]: Abstraction has 7414 states and 32990 transitions. [2021-06-05 15:11:38,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:38,053 INFO L276 IsEmpty]: Start isEmpty. Operand 7414 states and 32990 transitions. [2021-06-05 15:11:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:38,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:38,126 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:38,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:38,326 INFO L430 AbstractCegarLoop]: === Iteration 304 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:38,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:38,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1848911834, now seen corresponding path program 29 times [2021-06-05 15:11:38,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:38,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122707960] [2021-06-05 15:11:38,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:38,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:38,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122707960] [2021-06-05 15:11:38,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122707960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:38,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758548779] [2021-06-05 15:11:38,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:38,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:11:38,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:38,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:38,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:38,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:38,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:38,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:38,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 15:11:38,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:38,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:38,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:38,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:242 [2021-06-05 15:11:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:38,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758548779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:38,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:38,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:11:38,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658820227] [2021-06-05 15:11:38,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:11:38,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:38,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:11:38,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:11:38,966 INFO L87 Difference]: Start difference. First operand 7414 states and 32990 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:41,627 INFO L93 Difference]: Finished difference Result 9125 states and 39473 transitions. [2021-06-05 15:11:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:11:41,627 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:41,646 INFO L225 Difference]: With dead ends: 9125 [2021-06-05 15:11:41,646 INFO L226 Difference]: Without dead ends: 8779 [2021-06-05 15:11:41,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 2075.0ms TimeCoverageRelationStatistics Valid=524, Invalid=3136, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:11:41,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8779 states. [2021-06-05 15:11:41,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8779 to 7410. [2021-06-05 15:11:41,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 4.44837359967607) internal successors, (32958), 7409 states have internal predecessors, (32958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:41,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 32958 transitions. [2021-06-05 15:11:41,857 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 32958 transitions. Word has length 30 [2021-06-05 15:11:41,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:41,857 INFO L482 AbstractCegarLoop]: Abstraction has 7410 states and 32958 transitions. [2021-06-05 15:11:41,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:41,857 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 32958 transitions. [2021-06-05 15:11:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:41,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:41,870 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:42,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable726,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:42,071 INFO L430 AbstractCegarLoop]: === Iteration 305 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:42,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:42,071 INFO L82 PathProgramCache]: Analyzing trace with hash -2116354752, now seen corresponding path program 69 times [2021-06-05 15:11:42,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:42,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059040698] [2021-06-05 15:11:42,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:42,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:42,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059040698] [2021-06-05 15:11:42,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059040698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:42,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441054493] [2021-06-05 15:11:42,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:42,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:11:42,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:42,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:42,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:42,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:42,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:11:42,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:42,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:42,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:42,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:11:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:42,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441054493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:42,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:42,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:11:42,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905888000] [2021-06-05 15:11:42,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:11:42,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:42,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:11:42,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:11:42,465 INFO L87 Difference]: Start difference. First operand 7410 states and 32958 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:44,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:44,231 INFO L93 Difference]: Finished difference Result 8541 states and 37482 transitions. [2021-06-05 15:11:44,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:11:44,231 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:44,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:44,251 INFO L225 Difference]: With dead ends: 8541 [2021-06-05 15:11:44,251 INFO L226 Difference]: Without dead ends: 8428 [2021-06-05 15:11:44,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1244.2ms TimeCoverageRelationStatistics Valid=397, Invalid=1955, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:11:44,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8428 states. [2021-06-05 15:11:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8428 to 7419. [2021-06-05 15:11:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7419 states, 7418 states have (on average 4.448368832569425) internal successors, (32998), 7418 states have internal predecessors, (32998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7419 states to 7419 states and 32998 transitions. [2021-06-05 15:11:44,402 INFO L78 Accepts]: Start accepts. Automaton has 7419 states and 32998 transitions. Word has length 30 [2021-06-05 15:11:44,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:44,402 INFO L482 AbstractCegarLoop]: Abstraction has 7419 states and 32998 transitions. [2021-06-05 15:11:44,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:44,402 INFO L276 IsEmpty]: Start isEmpty. Operand 7419 states and 32998 transitions. [2021-06-05 15:11:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:44,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:44,415 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:44,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:44,615 INFO L430 AbstractCegarLoop]: === Iteration 306 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:44,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1728795310, now seen corresponding path program 70 times [2021-06-05 15:11:44,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:44,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170658729] [2021-06-05 15:11:44,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:44,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:44,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170658729] [2021-06-05 15:11:44,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170658729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:44,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169310281] [2021-06-05 15:11:44,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:44,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:44,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:44,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:44,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:44,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:44,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:44,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:44,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:44,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:44,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169310281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:44,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:44,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:11:44,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019310545] [2021-06-05 15:11:44,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:11:44,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:44,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:11:44,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:11:44,960 INFO L87 Difference]: Start difference. First operand 7419 states and 32998 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:46,352 INFO L93 Difference]: Finished difference Result 8674 states and 38070 transitions. [2021-06-05 15:11:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:11:46,352 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:46,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:46,372 INFO L225 Difference]: With dead ends: 8674 [2021-06-05 15:11:46,373 INFO L226 Difference]: Without dead ends: 8585 [2021-06-05 15:11:46,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1078.9ms TimeCoverageRelationStatistics Valid=377, Invalid=1693, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:11:46,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2021-06-05 15:11:46,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 7421. [2021-06-05 15:11:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7421 states, 7420 states have (on average 4.447708894878706) internal successors, (33002), 7420 states have internal predecessors, (33002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7421 states to 7421 states and 33002 transitions. [2021-06-05 15:11:46,526 INFO L78 Accepts]: Start accepts. Automaton has 7421 states and 33002 transitions. Word has length 30 [2021-06-05 15:11:46,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:46,526 INFO L482 AbstractCegarLoop]: Abstraction has 7421 states and 33002 transitions. [2021-06-05 15:11:46,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:46,527 INFO L276 IsEmpty]: Start isEmpty. Operand 7421 states and 33002 transitions. [2021-06-05 15:11:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:46,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:46,540 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:46,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,297 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:46,740 INFO L430 AbstractCegarLoop]: === Iteration 307 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:46,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:46,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1722327526, now seen corresponding path program 71 times [2021-06-05 15:11:46,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:46,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137154133] [2021-06-05 15:11:46,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:46,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:46,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137154133] [2021-06-05 15:11:46,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137154133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:46,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58070655] [2021-06-05 15:11:46,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:46,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:46,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:46,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:46,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:47,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:47,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:47,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:47,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:47,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:47,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58070655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:47,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:47,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:11:47,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166702966] [2021-06-05 15:11:47,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:11:47,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:47,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:11:47,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:11:47,151 INFO L87 Difference]: Start difference. First operand 7421 states and 33002 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:48,235 INFO L93 Difference]: Finished difference Result 8467 states and 37247 transitions. [2021-06-05 15:11:48,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:11:48,235 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:48,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:48,255 INFO L225 Difference]: With dead ends: 8467 [2021-06-05 15:11:48,255 INFO L226 Difference]: Without dead ends: 8364 [2021-06-05 15:11:48,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 873.7ms TimeCoverageRelationStatistics Valid=283, Invalid=1199, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:11:48,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8364 states. [2021-06-05 15:11:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8364 to 7423. [2021-06-05 15:11:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7423 states, 7422 states have (on average 4.447184047426569) internal successors, (33007), 7422 states have internal predecessors, (33007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7423 states to 7423 states and 33007 transitions. [2021-06-05 15:11:48,404 INFO L78 Accepts]: Start accepts. Automaton has 7423 states and 33007 transitions. Word has length 30 [2021-06-05 15:11:48,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:48,404 INFO L482 AbstractCegarLoop]: Abstraction has 7423 states and 33007 transitions. [2021-06-05 15:11:48,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:48,404 INFO L276 IsEmpty]: Start isEmpty. Operand 7423 states and 33007 transitions. [2021-06-05 15:11:48,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:48,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:48,417 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:48,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-06-05 15:11:48,618 INFO L430 AbstractCegarLoop]: === Iteration 308 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:48,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:48,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1132246480, now seen corresponding path program 6 times [2021-06-05 15:11:48,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:48,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536291409] [2021-06-05 15:11:48,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:48,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:48,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536291409] [2021-06-05 15:11:48,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536291409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:48,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308698622] [2021-06-05 15:11:48,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:48,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:11:48,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:48,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:48,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:48,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:48,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:48,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:48,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:48,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:49,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308698622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:49,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:49,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:11:49,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927594761] [2021-06-05 15:11:49,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:11:49,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:49,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:11:49,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:11:49,030 INFO L87 Difference]: Start difference. First operand 7423 states and 33007 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:50,278 INFO L93 Difference]: Finished difference Result 8818 states and 38602 transitions. [2021-06-05 15:11:50,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:11:50,278 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:50,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:50,298 INFO L225 Difference]: With dead ends: 8818 [2021-06-05 15:11:50,298 INFO L226 Difference]: Without dead ends: 8700 [2021-06-05 15:11:50,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 986.6ms TimeCoverageRelationStatistics Valid=353, Invalid=1627, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:11:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8700 states. [2021-06-05 15:11:50,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8700 to 7442. [2021-06-05 15:11:50,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7442 states, 7441 states have (on average 4.445370245934686) internal successors, (33078), 7441 states have internal predecessors, (33078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7442 states to 7442 states and 33078 transitions. [2021-06-05 15:11:50,449 INFO L78 Accepts]: Start accepts. Automaton has 7442 states and 33078 transitions. Word has length 30 [2021-06-05 15:11:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:50,449 INFO L482 AbstractCegarLoop]: Abstraction has 7442 states and 33078 transitions. [2021-06-05 15:11:50,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 7442 states and 33078 transitions. [2021-06-05 15:11:50,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:50,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:50,462 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:50,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-06-05 15:11:50,662 INFO L430 AbstractCegarLoop]: === Iteration 309 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:50,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:50,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1752730546, now seen corresponding path program 7 times [2021-06-05 15:11:50,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:50,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627815162] [2021-06-05 15:11:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:50,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:50,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627815162] [2021-06-05 15:11:50,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627815162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:50,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170871174] [2021-06-05 15:11:50,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:50,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:50,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:50,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:50,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:50,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:50,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:50,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:50,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170871174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:50,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:50,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:11:50,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057164604] [2021-06-05 15:11:50,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:11:50,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:50,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:11:50,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:11:50,996 INFO L87 Difference]: Start difference. First operand 7442 states and 33078 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:52,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:52,348 INFO L93 Difference]: Finished difference Result 8748 states and 38353 transitions. [2021-06-05 15:11:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:11:52,348 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:52,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:52,417 INFO L225 Difference]: With dead ends: 8748 [2021-06-05 15:11:52,417 INFO L226 Difference]: Without dead ends: 8632 [2021-06-05 15:11:52,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 936.7ms TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:11:52,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8632 states. [2021-06-05 15:11:52,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8632 to 7431. [2021-06-05 15:11:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7431 states, 7430 states have (on average 4.446164199192463) internal successors, (33035), 7430 states have internal predecessors, (33035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7431 states to 7431 states and 33035 transitions. [2021-06-05 15:11:52,577 INFO L78 Accepts]: Start accepts. Automaton has 7431 states and 33035 transitions. Word has length 30 [2021-06-05 15:11:52,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:52,577 INFO L482 AbstractCegarLoop]: Abstraction has 7431 states and 33035 transitions. [2021-06-05 15:11:52,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:52,577 INFO L276 IsEmpty]: Start isEmpty. Operand 7431 states and 33035 transitions. [2021-06-05 15:11:52,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:52,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:52,590 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:52,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 15:11:52,791 INFO L430 AbstractCegarLoop]: === Iteration 310 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:52,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:52,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1046851404, now seen corresponding path program 72 times [2021-06-05 15:11:52,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:52,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759696659] [2021-06-05 15:11:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:52,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:52,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759696659] [2021-06-05 15:11:52,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759696659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:52,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787374441] [2021-06-05 15:11:52,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:52,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:11:52,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:52,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:52,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:53,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:53,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:11:53,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:11:53,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:53,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:53,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:53,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:11:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:53,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787374441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:53,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:53,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:11:53,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404207185] [2021-06-05 15:11:53,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:53,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:53,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:53,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:53,236 INFO L87 Difference]: Start difference. First operand 7431 states and 33035 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:55,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:55,251 INFO L93 Difference]: Finished difference Result 8879 states and 38734 transitions. [2021-06-05 15:11:55,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:11:55,251 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:55,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:55,271 INFO L225 Difference]: With dead ends: 8879 [2021-06-05 15:11:55,271 INFO L226 Difference]: Without dead ends: 8772 [2021-06-05 15:11:55,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1455.2ms TimeCoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:11:55,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8772 states. [2021-06-05 15:11:55,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8772 to 7439. [2021-06-05 15:11:55,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7439 states, 7438 states have (on average 4.44541543425652) internal successors, (33065), 7438 states have internal predecessors, (33065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7439 states to 7439 states and 33065 transitions. [2021-06-05 15:11:55,416 INFO L78 Accepts]: Start accepts. Automaton has 7439 states and 33065 transitions. Word has length 30 [2021-06-05 15:11:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:55,416 INFO L482 AbstractCegarLoop]: Abstraction has 7439 states and 33065 transitions. [2021-06-05 15:11:55,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:55,416 INFO L276 IsEmpty]: Start isEmpty. Operand 7439 states and 33065 transitions. [2021-06-05 15:11:55,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:55,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:55,430 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:55,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:55,630 INFO L430 AbstractCegarLoop]: === Iteration 311 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:55,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:55,630 INFO L82 PathProgramCache]: Analyzing trace with hash -181195952, now seen corresponding path program 8 times [2021-06-05 15:11:55,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:55,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723383638] [2021-06-05 15:11:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:55,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:55,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723383638] [2021-06-05 15:11:55,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723383638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:55,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195802423] [2021-06-05 15:11:55,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:55,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:55,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:55,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:55,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:56,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:56,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:11:56,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:11:56,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:56,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:56,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:56,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:11:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:56,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195802423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:56,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:56,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:11:56,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349318888] [2021-06-05 15:11:56,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:11:56,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:56,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:11:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:11:56,050 INFO L87 Difference]: Start difference. First operand 7439 states and 33065 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:57,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:57,985 INFO L93 Difference]: Finished difference Result 9184 states and 39997 transitions. [2021-06-05 15:11:57,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:11:57,985 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:11:57,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:58,005 INFO L225 Difference]: With dead ends: 9184 [2021-06-05 15:11:58,006 INFO L226 Difference]: Without dead ends: 8956 [2021-06-05 15:11:58,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1511.3ms TimeCoverageRelationStatistics Valid=635, Invalid=2905, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:11:58,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8956 states. [2021-06-05 15:11:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8956 to 7428. [2021-06-05 15:11:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7428 states, 7427 states have (on average 4.446344419011714) internal successors, (33023), 7427 states have internal predecessors, (33023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7428 states to 7428 states and 33023 transitions. [2021-06-05 15:11:58,156 INFO L78 Accepts]: Start accepts. Automaton has 7428 states and 33023 transitions. Word has length 30 [2021-06-05 15:11:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:58,156 INFO L482 AbstractCegarLoop]: Abstraction has 7428 states and 33023 transitions. [2021-06-05 15:11:58,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 7428 states and 33023 transitions. [2021-06-05 15:11:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:11:58,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:58,169 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:58,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2021-06-05 15:11:58,369 INFO L430 AbstractCegarLoop]: === Iteration 312 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:58,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1397881106, now seen corresponding path program 30 times [2021-06-05 15:11:58,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:58,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678761773] [2021-06-05 15:11:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:58,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:58,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678761773] [2021-06-05 15:11:58,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678761773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:58,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613843156] [2021-06-05 15:11:58,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:58,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:11:58,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:58,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:58,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:58,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:58,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:11:58,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:58,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:58,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:58,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:11:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:58,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613843156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:58,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:58,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:11:58,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562625168] [2021-06-05 15:11:58,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:58,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:58,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:58,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:58,794 INFO L87 Difference]: Start difference. First operand 7428 states and 33023 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:01,627 INFO L93 Difference]: Finished difference Result 11373 states and 48519 transitions. [2021-06-05 15:12:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 15:12:01,628 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:01,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:01,652 INFO L225 Difference]: With dead ends: 11373 [2021-06-05 15:12:01,652 INFO L226 Difference]: Without dead ends: 11072 [2021-06-05 15:12:01,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 1890.9ms TimeCoverageRelationStatistics Valid=683, Invalid=5017, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 15:12:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11072 states. [2021-06-05 15:12:01,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11072 to 7702. [2021-06-05 15:12:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7702 states, 7701 states have (on average 4.460329827295157) internal successors, (34349), 7701 states have internal predecessors, (34349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7702 states to 7702 states and 34349 transitions. [2021-06-05 15:12:01,841 INFO L78 Accepts]: Start accepts. Automaton has 7702 states and 34349 transitions. Word has length 30 [2021-06-05 15:12:01,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:01,841 INFO L482 AbstractCegarLoop]: Abstraction has 7702 states and 34349 transitions. [2021-06-05 15:12:01,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand 7702 states and 34349 transitions. [2021-06-05 15:12:01,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:01,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:01,855 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:02,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable745,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:02,055 INFO L430 AbstractCegarLoop]: === Iteration 313 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:02,056 INFO L82 PathProgramCache]: Analyzing trace with hash 687581948, now seen corresponding path program 9 times [2021-06-05 15:12:02,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:02,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133445019] [2021-06-05 15:12:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:02,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:02,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133445019] [2021-06-05 15:12:02,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133445019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:02,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954737209] [2021-06-05 15:12:02,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:02,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:12:02,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:02,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:12:02,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:02,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:02,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:02,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 56 [2021-06-05 15:12:02,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:12:02,626 INFO L628 ElimStorePlain]: treesize reduction 54, result has 64.7 percent of original size [2021-06-05 15:12:02,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:02,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:348 [2021-06-05 15:12:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:02,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954737209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:02,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:02,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 15:12:02,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946261606] [2021-06-05 15:12:02,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:02,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:02,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:02,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:02,866 INFO L87 Difference]: Start difference. First operand 7702 states and 34349 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:06,022 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-06-05 15:12:07,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:07,289 INFO L93 Difference]: Finished difference Result 12430 states and 52327 transitions. [2021-06-05 15:12:07,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 15:12:07,289 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:07,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:07,316 INFO L225 Difference]: With dead ends: 12430 [2021-06-05 15:12:07,316 INFO L226 Difference]: Without dead ends: 12266 [2021-06-05 15:12:07,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 3361.5ms TimeCoverageRelationStatistics Valid=965, Invalid=6517, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 15:12:07,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12266 states. [2021-06-05 15:12:07,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12266 to 7721. [2021-06-05 15:12:07,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7721 states, 7720 states have (on average 4.457642487046632) internal successors, (34413), 7720 states have internal predecessors, (34413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7721 states to 7721 states and 34413 transitions. [2021-06-05 15:12:07,520 INFO L78 Accepts]: Start accepts. Automaton has 7721 states and 34413 transitions. Word has length 30 [2021-06-05 15:12:07,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:07,521 INFO L482 AbstractCegarLoop]: Abstraction has 7721 states and 34413 transitions. [2021-06-05 15:12:07,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 7721 states and 34413 transitions. [2021-06-05 15:12:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:07,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:07,534 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:07,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable748 [2021-06-05 15:12:07,735 INFO L430 AbstractCegarLoop]: === Iteration 314 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:07,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:07,735 INFO L82 PathProgramCache]: Analyzing trace with hash 609827348, now seen corresponding path program 10 times [2021-06-05 15:12:07,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:07,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732560041] [2021-06-05 15:12:07,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:07,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:07,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732560041] [2021-06-05 15:12:07,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732560041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:07,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3393928] [2021-06-05 15:12:07,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:07,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:07,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:07,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:07,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:08,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:12:08,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:08,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:08,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:08,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:12:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:08,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3393928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:08,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:08,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:12:08,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246490617] [2021-06-05 15:12:08,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:12:08,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:08,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:12:08,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:12:08,077 INFO L87 Difference]: Start difference. First operand 7721 states and 34413 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:09,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:09,803 INFO L93 Difference]: Finished difference Result 13250 states and 56011 transitions. [2021-06-05 15:12:09,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:12:09,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:09,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:09,833 INFO L225 Difference]: With dead ends: 13250 [2021-06-05 15:12:09,834 INFO L226 Difference]: Without dead ends: 12863 [2021-06-05 15:12:09,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1131.8ms TimeCoverageRelationStatistics Valid=655, Invalid=2885, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:12:09,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12863 states. [2021-06-05 15:12:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12863 to 7867. [2021-06-05 15:12:10,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7867 states, 7866 states have (on average 4.461606915840325) internal successors, (35095), 7866 states have internal predecessors, (35095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7867 states to 7867 states and 35095 transitions. [2021-06-05 15:12:10,114 INFO L78 Accepts]: Start accepts. Automaton has 7867 states and 35095 transitions. Word has length 30 [2021-06-05 15:12:10,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:10,114 INFO L482 AbstractCegarLoop]: Abstraction has 7867 states and 35095 transitions. [2021-06-05 15:12:10,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:10,114 INFO L276 IsEmpty]: Start isEmpty. Operand 7867 states and 35095 transitions. [2021-06-05 15:12:10,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:10,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:10,127 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:10,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-06-05 15:12:10,328 INFO L430 AbstractCegarLoop]: === Iteration 315 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:10,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:10,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1757351682, now seen corresponding path program 31 times [2021-06-05 15:12:10,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:10,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893258215] [2021-06-05 15:12:10,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:10,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:10,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893258215] [2021-06-05 15:12:10,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893258215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:10,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112196397] [2021-06-05 15:12:10,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:10,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:10,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:10,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:12:10,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:10,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:10,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:10,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:12:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:10,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112196397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:10,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:10,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:12:10,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994895302] [2021-06-05 15:12:10,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:12:10,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:10,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:12:10,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:12:10,683 INFO L87 Difference]: Start difference. First operand 7867 states and 35095 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:13,061 INFO L93 Difference]: Finished difference Result 11100 states and 47697 transitions. [2021-06-05 15:12:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:12:13,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:13,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:13,085 INFO L225 Difference]: With dead ends: 11100 [2021-06-05 15:12:13,086 INFO L226 Difference]: Without dead ends: 11006 [2021-06-05 15:12:13,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 1559.1ms TimeCoverageRelationStatistics Valid=598, Invalid=4094, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:12:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11006 states. [2021-06-05 15:12:13,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11006 to 8197. [2021-06-05 15:12:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8197 states, 8196 states have (on average 4.448023426061494) internal successors, (36456), 8196 states have internal predecessors, (36456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8197 states to 8197 states and 36456 transitions. [2021-06-05 15:12:13,267 INFO L78 Accepts]: Start accepts. Automaton has 8197 states and 36456 transitions. Word has length 30 [2021-06-05 15:12:13,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:13,267 INFO L482 AbstractCegarLoop]: Abstraction has 8197 states and 36456 transitions. [2021-06-05 15:12:13,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 8197 states and 36456 transitions. [2021-06-05 15:12:13,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:13,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:13,281 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:13,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2021-06-05 15:12:13,482 INFO L430 AbstractCegarLoop]: === Iteration 316 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:13,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:13,482 INFO L82 PathProgramCache]: Analyzing trace with hash 925137046, now seen corresponding path program 32 times [2021-06-05 15:12:13,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:13,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935120208] [2021-06-05 15:12:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:13,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:13,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935120208] [2021-06-05 15:12:13,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935120208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:13,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057192012] [2021-06-05 15:12:13,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:13,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:13,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:13,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:13,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:13,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:13,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:12:13,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:13,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:13,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:13,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:12:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:13,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057192012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:13,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:13,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:12:13,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969639840] [2021-06-05 15:12:13,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:13,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:13,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:13,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:13,959 INFO L87 Difference]: Start difference. First operand 8197 states and 36456 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:17,025 INFO L93 Difference]: Finished difference Result 11801 states and 50526 transitions. [2021-06-05 15:12:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 15:12:17,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:17,051 INFO L225 Difference]: With dead ends: 11801 [2021-06-05 15:12:17,051 INFO L226 Difference]: Without dead ends: 11608 [2021-06-05 15:12:17,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2208 ImplicationChecksByTransitivity, 2234.9ms TimeCoverageRelationStatistics Valid=769, Invalid=6037, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 15:12:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11608 states. [2021-06-05 15:12:17,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11608 to 8439. [2021-06-05 15:12:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8439 states, 8438 states have (on average 4.457335861578573) internal successors, (37611), 8438 states have internal predecessors, (37611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8439 states to 8439 states and 37611 transitions. [2021-06-05 15:12:17,255 INFO L78 Accepts]: Start accepts. Automaton has 8439 states and 37611 transitions. Word has length 30 [2021-06-05 15:12:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:17,255 INFO L482 AbstractCegarLoop]: Abstraction has 8439 states and 37611 transitions. [2021-06-05 15:12:17,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 8439 states and 37611 transitions. [2021-06-05 15:12:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:17,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:17,269 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:17,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-06-05 15:12:17,470 INFO L430 AbstractCegarLoop]: === Iteration 317 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash 68025794, now seen corresponding path program 11 times [2021-06-05 15:12:17,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:17,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239659632] [2021-06-05 15:12:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:17,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:17,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239659632] [2021-06-05 15:12:17,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239659632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:17,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956350684] [2021-06-05 15:12:17,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:17,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:12:17,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:17,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:17,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:17,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:12:17,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:17,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:17,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:17,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:12:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:17,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956350684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:17,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:17,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:12:17,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146953253] [2021-06-05 15:12:17,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:12:17,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:17,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:12:17,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:12:17,837 INFO L87 Difference]: Start difference. First operand 8439 states and 37611 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:19,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:19,920 INFO L93 Difference]: Finished difference Result 12986 states and 55108 transitions. [2021-06-05 15:12:19,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 15:12:19,921 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:19,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:19,951 INFO L225 Difference]: With dead ends: 12986 [2021-06-05 15:12:19,951 INFO L226 Difference]: Without dead ends: 12883 [2021-06-05 15:12:19,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1266.7ms TimeCoverageRelationStatistics Valid=510, Invalid=3150, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:12:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12883 states. [2021-06-05 15:12:20,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12883 to 8673. [2021-06-05 15:12:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8673 states, 8672 states have (on average 4.460216789667896) internal successors, (38679), 8672 states have internal predecessors, (38679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8673 states to 8673 states and 38679 transitions. [2021-06-05 15:12:20,191 INFO L78 Accepts]: Start accepts. Automaton has 8673 states and 38679 transitions. Word has length 30 [2021-06-05 15:12:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:20,191 INFO L482 AbstractCegarLoop]: Abstraction has 8673 states and 38679 transitions. [2021-06-05 15:12:20,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:20,191 INFO L276 IsEmpty]: Start isEmpty. Operand 8673 states and 38679 transitions. [2021-06-05 15:12:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:20,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:20,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:20,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-06-05 15:12:20,406 INFO L430 AbstractCegarLoop]: === Iteration 318 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:20,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:20,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1834054326, now seen corresponding path program 12 times [2021-06-05 15:12:20,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:20,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623674548] [2021-06-05 15:12:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:20,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:20,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623674548] [2021-06-05 15:12:20,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623674548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:20,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052401067] [2021-06-05 15:12:20,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:20,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:12:20,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:20,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:20,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:20,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:20,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:12:20,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:20,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:20,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:20,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:12:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:20,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052401067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:20,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:20,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 15:12:20,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746392099] [2021-06-05 15:12:20,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:12:20,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:20,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:12:20,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:12:20,798 INFO L87 Difference]: Start difference. First operand 8673 states and 38679 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:22,629 INFO L93 Difference]: Finished difference Result 13582 states and 57485 transitions. [2021-06-05 15:12:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:12:22,630 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:22,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:22,661 INFO L225 Difference]: With dead ends: 13582 [2021-06-05 15:12:22,661 INFO L226 Difference]: Without dead ends: 13471 [2021-06-05 15:12:22,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1215.3ms TimeCoverageRelationStatistics Valid=493, Invalid=2929, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:12:22,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13471 states. [2021-06-05 15:12:22,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13471 to 8840. [2021-06-05 15:12:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8840 states, 8839 states have (on average 4.465889806539201) internal successors, (39474), 8839 states have internal predecessors, (39474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:22,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8840 states to 8840 states and 39474 transitions. [2021-06-05 15:12:22,948 INFO L78 Accepts]: Start accepts. Automaton has 8840 states and 39474 transitions. Word has length 30 [2021-06-05 15:12:22,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:22,948 INFO L482 AbstractCegarLoop]: Abstraction has 8840 states and 39474 transitions. [2021-06-05 15:12:22,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:22,948 INFO L276 IsEmpty]: Start isEmpty. Operand 8840 states and 39474 transitions. [2021-06-05 15:12:22,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:22,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:22,963 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:23,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:23,164 INFO L430 AbstractCegarLoop]: === Iteration 319 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:23,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:23,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1523173194, now seen corresponding path program 75 times [2021-06-05 15:12:23,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:23,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391818650] [2021-06-05 15:12:23,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:23,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:23,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391818650] [2021-06-05 15:12:23,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391818650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:23,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867624954] [2021-06-05 15:12:23,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:23,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:12:23,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:23,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:23,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:23,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:23,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:12:23,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:23,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:23,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:23,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:12:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:23,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867624954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:23,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:23,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:12:23,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617963589] [2021-06-05 15:12:23,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:23,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:23,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:23,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:23,599 INFO L87 Difference]: Start difference. First operand 8840 states and 39474 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:27,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:27,332 INFO L93 Difference]: Finished difference Result 14112 states and 59867 transitions. [2021-06-05 15:12:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 15:12:27,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:27,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:27,366 INFO L225 Difference]: With dead ends: 14112 [2021-06-05 15:12:27,367 INFO L226 Difference]: Without dead ends: 13839 [2021-06-05 15:12:27,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 2323.5ms TimeCoverageRelationStatistics Valid=741, Invalid=5111, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:12:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2021-06-05 15:12:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 9072. [2021-06-05 15:12:27,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9072 states, 9071 states have (on average 4.48120383640172) internal successors, (40649), 9071 states have internal predecessors, (40649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:27,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9072 states to 9072 states and 40649 transitions. [2021-06-05 15:12:27,640 INFO L78 Accepts]: Start accepts. Automaton has 9072 states and 40649 transitions. Word has length 30 [2021-06-05 15:12:27,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:27,640 INFO L482 AbstractCegarLoop]: Abstraction has 9072 states and 40649 transitions. [2021-06-05 15:12:27,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:27,641 INFO L276 IsEmpty]: Start isEmpty. Operand 9072 states and 40649 transitions. [2021-06-05 15:12:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:27,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:27,656 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:27,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:27,857 INFO L430 AbstractCegarLoop]: === Iteration 320 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2061494944, now seen corresponding path program 73 times [2021-06-05 15:12:27,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:27,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510598267] [2021-06-05 15:12:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:27,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:27,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510598267] [2021-06-05 15:12:27,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510598267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:27,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138384123] [2021-06-05 15:12:27,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:28,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:28,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:28,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:12:28,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:28,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:28,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:28,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:12:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:28,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138384123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:28,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:28,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:12:28,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024065726] [2021-06-05 15:12:28,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:12:28,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:28,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:12:28,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:12:28,190 INFO L87 Difference]: Start difference. First operand 9072 states and 40649 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:31,290 INFO L93 Difference]: Finished difference Result 14532 states and 61745 transitions. [2021-06-05 15:12:31,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:12:31,290 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:31,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:31,324 INFO L225 Difference]: With dead ends: 14532 [2021-06-05 15:12:31,324 INFO L226 Difference]: Without dead ends: 14328 [2021-06-05 15:12:31,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1785.0ms TimeCoverageRelationStatistics Valid=736, Invalid=4234, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 15:12:31,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14328 states. [2021-06-05 15:12:31,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14328 to 9157. [2021-06-05 15:12:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9157 states, 9156 states have (on average 4.4853647881170815) internal successors, (41068), 9156 states have internal predecessors, (41068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 41068 transitions. [2021-06-05 15:12:31,620 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 41068 transitions. Word has length 30 [2021-06-05 15:12:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:31,620 INFO L482 AbstractCegarLoop]: Abstraction has 9157 states and 41068 transitions. [2021-06-05 15:12:31,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 41068 transitions. [2021-06-05 15:12:31,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:31,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:31,635 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:31,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable773,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:31,836 INFO L430 AbstractCegarLoop]: === Iteration 321 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:31,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:31,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1796652530, now seen corresponding path program 76 times [2021-06-05 15:12:31,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:31,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271750626] [2021-06-05 15:12:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:31,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:31,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271750626] [2021-06-05 15:12:31,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271750626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:31,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833194831] [2021-06-05 15:12:31,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:32,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:32,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:32,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:32,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:32,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:12:32,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:32,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:32,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:32,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:12:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:32,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833194831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:32,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:32,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:12:32,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157259933] [2021-06-05 15:12:32,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:12:32,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:32,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:12:32,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:12:32,186 INFO L87 Difference]: Start difference. First operand 9157 states and 41068 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:35,331 INFO L93 Difference]: Finished difference Result 13986 states and 59946 transitions. [2021-06-05 15:12:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 15:12:35,331 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:35,365 INFO L225 Difference]: With dead ends: 13986 [2021-06-05 15:12:35,365 INFO L226 Difference]: Without dead ends: 13650 [2021-06-05 15:12:35,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 2246.3ms TimeCoverageRelationStatistics Valid=1015, Invalid=5305, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:12:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13650 states. [2021-06-05 15:12:35,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13650 to 9213. [2021-06-05 15:12:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9213 states, 9212 states have (on average 4.486539296569692) internal successors, (41330), 9212 states have internal predecessors, (41330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9213 states to 9213 states and 41330 transitions. [2021-06-05 15:12:35,682 INFO L78 Accepts]: Start accepts. Automaton has 9213 states and 41330 transitions. Word has length 30 [2021-06-05 15:12:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:35,682 INFO L482 AbstractCegarLoop]: Abstraction has 9213 states and 41330 transitions. [2021-06-05 15:12:35,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 9213 states and 41330 transitions. [2021-06-05 15:12:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:35,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:35,698 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:35,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-06-05 15:12:35,898 INFO L430 AbstractCegarLoop]: === Iteration 322 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:35,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:35,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1483126134, now seen corresponding path program 77 times [2021-06-05 15:12:35,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:35,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762164774] [2021-06-05 15:12:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:36,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:36,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762164774] [2021-06-05 15:12:36,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762164774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:36,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688295169] [2021-06-05 15:12:36,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:36,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:12:36,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:36,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:36,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:36,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:12:36,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:36,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:36,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:36,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:12:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:36,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688295169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:36,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:36,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:12:36,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202074167] [2021-06-05 15:12:36,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:12:36,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:36,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:12:36,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:12:36,253 INFO L87 Difference]: Start difference. First operand 9213 states and 41330 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:39,636 INFO L93 Difference]: Finished difference Result 16382 states and 69164 transitions. [2021-06-05 15:12:39,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 15:12:39,636 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:39,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:39,673 INFO L225 Difference]: With dead ends: 16382 [2021-06-05 15:12:39,673 INFO L226 Difference]: Without dead ends: 15742 [2021-06-05 15:12:39,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2697 ImplicationChecksByTransitivity, 2444.6ms TimeCoverageRelationStatistics Valid=1385, Invalid=6271, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 15:12:39,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15742 states. [2021-06-05 15:12:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 9237. [2021-06-05 15:12:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9237 states, 9236 states have (on average 4.489281074058034) internal successors, (41463), 9236 states have internal predecessors, (41463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:40,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9237 states to 9237 states and 41463 transitions. [2021-06-05 15:12:40,001 INFO L78 Accepts]: Start accepts. Automaton has 9237 states and 41463 transitions. Word has length 30 [2021-06-05 15:12:40,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:40,001 INFO L482 AbstractCegarLoop]: Abstraction has 9237 states and 41463 transitions. [2021-06-05 15:12:40,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:40,001 INFO L276 IsEmpty]: Start isEmpty. Operand 9237 states and 41463 transitions. [2021-06-05 15:12:40,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:40,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:40,017 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:40,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:40,217 INFO L430 AbstractCegarLoop]: === Iteration 323 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:40,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:40,218 INFO L82 PathProgramCache]: Analyzing trace with hash 623627036, now seen corresponding path program 74 times [2021-06-05 15:12:40,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:40,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557647175] [2021-06-05 15:12:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:40,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:40,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557647175] [2021-06-05 15:12:40,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557647175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:40,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720672778] [2021-06-05 15:12:40,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:40,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:40,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:40,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:40,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:40,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:40,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:12:40,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:40,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:40,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:40,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:12:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:40,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720672778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:40,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:40,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:12:40,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578237035] [2021-06-05 15:12:40,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:12:40,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:40,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:12:40,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:12:40,604 INFO L87 Difference]: Start difference. First operand 9237 states and 41463 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:43,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:43,581 INFO L93 Difference]: Finished difference Result 13229 states and 56968 transitions. [2021-06-05 15:12:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 15:12:43,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:43,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:43,613 INFO L225 Difference]: With dead ends: 13229 [2021-06-05 15:12:43,613 INFO L226 Difference]: Without dead ends: 12942 [2021-06-05 15:12:43,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 2076.1ms TimeCoverageRelationStatistics Valid=792, Invalid=4464, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:12:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12942 states. [2021-06-05 15:12:43,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12942 to 9225. [2021-06-05 15:12:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9225 states, 9224 states have (on average 4.490134431916739) internal successors, (41417), 9224 states have internal predecessors, (41417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9225 states to 9225 states and 41417 transitions. [2021-06-05 15:12:43,863 INFO L78 Accepts]: Start accepts. Automaton has 9225 states and 41417 transitions. Word has length 30 [2021-06-05 15:12:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:43,863 INFO L482 AbstractCegarLoop]: Abstraction has 9225 states and 41417 transitions. [2021-06-05 15:12:43,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:43,864 INFO L276 IsEmpty]: Start isEmpty. Operand 9225 states and 41417 transitions. [2021-06-05 15:12:43,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:43,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:43,970 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:44,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable776 [2021-06-05 15:12:44,170 INFO L430 AbstractCegarLoop]: === Iteration 324 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:44,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1836286546, now seen corresponding path program 75 times [2021-06-05 15:12:44,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:44,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454087256] [2021-06-05 15:12:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:44,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:44,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454087256] [2021-06-05 15:12:44,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454087256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:44,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263499408] [2021-06-05 15:12:44,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:44,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:12:44,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:44,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:44,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:44,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:44,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:12:44,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:44,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:44,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:44,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:12:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:44,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263499408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:44,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:44,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:12:44,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773659533] [2021-06-05 15:12:44,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:44,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:44,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:44,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:44,572 INFO L87 Difference]: Start difference. First operand 9225 states and 41417 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:48,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:48,088 INFO L93 Difference]: Finished difference Result 12940 states and 56141 transitions. [2021-06-05 15:12:48,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 15:12:48,089 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:48,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:48,120 INFO L225 Difference]: With dead ends: 12940 [2021-06-05 15:12:48,120 INFO L226 Difference]: Without dead ends: 12697 [2021-06-05 15:12:48,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2335 ImplicationChecksByTransitivity, 2663.7ms TimeCoverageRelationStatistics Valid=1123, Invalid=5519, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 15:12:48,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12697 states. [2021-06-05 15:12:48,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12697 to 9261. [2021-06-05 15:12:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9261 states, 9260 states have (on average 4.490604751619871) internal successors, (41583), 9260 states have internal predecessors, (41583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9261 states to 9261 states and 41583 transitions. [2021-06-05 15:12:48,452 INFO L78 Accepts]: Start accepts. Automaton has 9261 states and 41583 transitions. Word has length 30 [2021-06-05 15:12:48,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:48,453 INFO L482 AbstractCegarLoop]: Abstraction has 9261 states and 41583 transitions. [2021-06-05 15:12:48,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 9261 states and 41583 transitions. [2021-06-05 15:12:48,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:48,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:48,469 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:48,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable778,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:48,670 INFO L430 AbstractCegarLoop]: === Iteration 325 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:48,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:48,670 INFO L82 PathProgramCache]: Analyzing trace with hash 167342018, now seen corresponding path program 76 times [2021-06-05 15:12:48,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:48,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686158253] [2021-06-05 15:12:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:48,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:48,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686158253] [2021-06-05 15:12:48,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686158253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:48,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243269605] [2021-06-05 15:12:48,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:48,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:48,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:48,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:48,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:48,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:12:48,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:48,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:48,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:48,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:12:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:48,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243269605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:48,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:48,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:12:48,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086010524] [2021-06-05 15:12:48,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:12:48,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:48,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:12:48,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:12:48,985 INFO L87 Difference]: Start difference. First operand 9261 states and 41583 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:50,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:50,727 INFO L93 Difference]: Finished difference Result 13065 states and 56568 transitions. [2021-06-05 15:12:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:12:50,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:50,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:50,758 INFO L225 Difference]: With dead ends: 13065 [2021-06-05 15:12:50,758 INFO L226 Difference]: Without dead ends: 12907 [2021-06-05 15:12:50,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1137.2ms TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:12:50,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12907 states. [2021-06-05 15:12:50,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12907 to 9259. [2021-06-05 15:12:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9259 states, 9258 states have (on average 4.490062648520198) internal successors, (41569), 9258 states have internal predecessors, (41569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9259 states to 9259 states and 41569 transitions. [2021-06-05 15:12:50,984 INFO L78 Accepts]: Start accepts. Automaton has 9259 states and 41569 transitions. Word has length 30 [2021-06-05 15:12:50,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:50,984 INFO L482 AbstractCegarLoop]: Abstraction has 9259 states and 41569 transitions. [2021-06-05 15:12:50,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:50,984 INFO L276 IsEmpty]: Start isEmpty. Operand 9259 states and 41569 transitions. [2021-06-05 15:12:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:50,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:50,999 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:51,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:51,200 INFO L430 AbstractCegarLoop]: === Iteration 326 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:51,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:51,200 INFO L82 PathProgramCache]: Analyzing trace with hash 15615248, now seen corresponding path program 78 times [2021-06-05 15:12:51,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:51,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905187273] [2021-06-05 15:12:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:51,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:51,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905187273] [2021-06-05 15:12:51,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905187273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:51,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827543177] [2021-06-05 15:12:51,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:51,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:12:51,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:51,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:51,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:51,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:51,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:12:51,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:51,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:51,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:51,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:12:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:51,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827543177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:51,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:51,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:12:51,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556286624] [2021-06-05 15:12:51,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:51,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:51,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:51,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:51,634 INFO L87 Difference]: Start difference. First operand 9259 states and 41569 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:55,457 INFO L93 Difference]: Finished difference Result 15478 states and 65441 transitions. [2021-06-05 15:12:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 15:12:55,458 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:55,495 INFO L225 Difference]: With dead ends: 15478 [2021-06-05 15:12:55,495 INFO L226 Difference]: Without dead ends: 15205 [2021-06-05 15:12:55,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 2373.2ms TimeCoverageRelationStatistics Valid=768, Invalid=5552, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:12:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15205 states. [2021-06-05 15:12:55,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15205 to 9415. [2021-06-05 15:12:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9415 states, 9414 states have (on average 4.497238155937965) internal successors, (42337), 9414 states have internal predecessors, (42337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9415 states to 9415 states and 42337 transitions. [2021-06-05 15:12:55,747 INFO L78 Accepts]: Start accepts. Automaton has 9415 states and 42337 transitions. Word has length 30 [2021-06-05 15:12:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:55,747 INFO L482 AbstractCegarLoop]: Abstraction has 9415 states and 42337 transitions. [2021-06-05 15:12:55,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:55,747 INFO L276 IsEmpty]: Start isEmpty. Operand 9415 states and 42337 transitions. [2021-06-05 15:12:55,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:55,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:55,763 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:55,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:55,964 INFO L430 AbstractCegarLoop]: === Iteration 327 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:55,964 INFO L82 PathProgramCache]: Analyzing trace with hash -694683910, now seen corresponding path program 77 times [2021-06-05 15:12:55,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:55,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256882680] [2021-06-05 15:12:55,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:56,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:56,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256882680] [2021-06-05 15:12:56,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256882680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:56,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447135983] [2021-06-05 15:12:56,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:56,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:12:56,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:56,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:56,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:56,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:12:56,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:56,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:56,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:56,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:12:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:56,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447135983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:56,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:56,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:12:56,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806925165] [2021-06-05 15:12:56,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:12:56,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:56,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:12:56,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:12:56,303 INFO L87 Difference]: Start difference. First operand 9415 states and 42337 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:59,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:59,476 INFO L93 Difference]: Finished difference Result 15715 states and 66500 transitions. [2021-06-05 15:12:59,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:12:59,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:12:59,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:59,513 INFO L225 Difference]: With dead ends: 15715 [2021-06-05 15:12:59,513 INFO L226 Difference]: Without dead ends: 15527 [2021-06-05 15:12:59,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 1848.3ms TimeCoverageRelationStatistics Valid=771, Invalid=4631, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 15:12:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15527 states. [2021-06-05 15:12:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15527 to 9384. [2021-06-05 15:12:59,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9384 states, 9383 states have (on average 4.499520409250772) internal successors, (42219), 9383 states have internal predecessors, (42219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9384 states to 9384 states and 42219 transitions. [2021-06-05 15:12:59,774 INFO L78 Accepts]: Start accepts. Automaton has 9384 states and 42219 transitions. Word has length 30 [2021-06-05 15:12:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:59,774 INFO L482 AbstractCegarLoop]: Abstraction has 9384 states and 42219 transitions. [2021-06-05 15:12:59,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 9384 states and 42219 transitions. [2021-06-05 15:12:59,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:12:59,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:59,790 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:59,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-06-05 15:12:59,990 INFO L430 AbstractCegarLoop]: === Iteration 328 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:59,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1155349756, now seen corresponding path program 79 times [2021-06-05 15:12:59,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:59,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082019843] [2021-06-05 15:12:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:00,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:00,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082019843] [2021-06-05 15:13:00,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082019843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:00,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019119957] [2021-06-05 15:13:00,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:00,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:00,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:00,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:00,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:00,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:00,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:00,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:13:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:00,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019119957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:00,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:00,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:13:00,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296462422] [2021-06-05 15:13:00,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:13:00,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:00,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:13:00,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:13:00,347 INFO L87 Difference]: Start difference. First operand 9384 states and 42219 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:03,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:03,025 INFO L93 Difference]: Finished difference Result 14046 states and 60063 transitions. [2021-06-05 15:13:03,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 15:13:03,025 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:03,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:03,057 INFO L225 Difference]: With dead ends: 14046 [2021-06-05 15:13:03,058 INFO L226 Difference]: Without dead ends: 13939 [2021-06-05 15:13:03,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 1543.2ms TimeCoverageRelationStatistics Valid=578, Invalid=4252, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:13:03,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13939 states. [2021-06-05 15:13:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13939 to 9507. [2021-06-05 15:13:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9507 states, 9506 states have (on average 4.493372606774669) internal successors, (42714), 9506 states have internal predecessors, (42714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9507 states to 9507 states and 42714 transitions. [2021-06-05 15:13:03,294 INFO L78 Accepts]: Start accepts. Automaton has 9507 states and 42714 transitions. Word has length 30 [2021-06-05 15:13:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:03,294 INFO L482 AbstractCegarLoop]: Abstraction has 9507 states and 42714 transitions. [2021-06-05 15:13:03,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 9507 states and 42714 transitions. [2021-06-05 15:13:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:03,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:03,311 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:03,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable785 [2021-06-05 15:13:03,512 INFO L430 AbstractCegarLoop]: === Iteration 329 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:03,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:03,512 INFO L82 PathProgramCache]: Analyzing trace with hash -457128812, now seen corresponding path program 80 times [2021-06-05 15:13:03,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:03,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856289004] [2021-06-05 15:13:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:03,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:03,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856289004] [2021-06-05 15:13:03,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856289004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:03,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047674390] [2021-06-05 15:13:03,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:03,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:03,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:03,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:13:03,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:03,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:03,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:13:03,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:03,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:03,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:03,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:13:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:04,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047674390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:04,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:04,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:13:04,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628141317] [2021-06-05 15:13:04,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:13:04,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:04,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:13:04,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:13:04,068 INFO L87 Difference]: Start difference. First operand 9507 states and 42714 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:08,012 INFO L93 Difference]: Finished difference Result 15338 states and 64843 transitions. [2021-06-05 15:13:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 15:13:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:08,048 INFO L225 Difference]: With dead ends: 15338 [2021-06-05 15:13:08,048 INFO L226 Difference]: Without dead ends: 14982 [2021-06-05 15:13:08,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2888 ImplicationChecksByTransitivity, 2715.2ms TimeCoverageRelationStatistics Valid=861, Invalid=7511, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 15:13:08,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14982 states. [2021-06-05 15:13:08,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14982 to 9743. [2021-06-05 15:13:08,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9743 states, 9742 states have (on average 4.499589406692671) internal successors, (43835), 9742 states have internal predecessors, (43835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:08,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9743 states to 9743 states and 43835 transitions. [2021-06-05 15:13:08,303 INFO L78 Accepts]: Start accepts. Automaton has 9743 states and 43835 transitions. Word has length 30 [2021-06-05 15:13:08,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:08,303 INFO L482 AbstractCegarLoop]: Abstraction has 9743 states and 43835 transitions. [2021-06-05 15:13:08,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 9743 states and 43835 transitions. [2021-06-05 15:13:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:08,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:08,321 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:08,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-05 15:13:08,521 INFO L430 AbstractCegarLoop]: === Iteration 330 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:08,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:08,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1314240064, now seen corresponding path program 78 times [2021-06-05 15:13:08,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:08,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506939992] [2021-06-05 15:13:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:08,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:08,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506939992] [2021-06-05 15:13:08,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506939992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:08,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269327318] [2021-06-05 15:13:08,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:08,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:13:08,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:08,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:13:08,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:08,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:08,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:13:08,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:08,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:08,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:08,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:13:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:08,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269327318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:08,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:08,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:13:08,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880547718] [2021-06-05 15:13:08,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:08,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:08,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:08,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:08,914 INFO L87 Difference]: Start difference. First operand 9743 states and 43835 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:11,988 INFO L93 Difference]: Finished difference Result 14261 states and 61281 transitions. [2021-06-05 15:13:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 15:13:11,988 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:11,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:12,022 INFO L225 Difference]: With dead ends: 14261 [2021-06-05 15:13:12,022 INFO L226 Difference]: Without dead ends: 14102 [2021-06-05 15:13:12,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 1885.7ms TimeCoverageRelationStatistics Valid=619, Invalid=4931, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:13:12,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14102 states. [2021-06-05 15:13:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14102 to 9760. [2021-06-05 15:13:12,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9760 states, 9759 states have (on average 4.498309252997234) internal successors, (43899), 9759 states have internal predecessors, (43899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:12,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9760 states to 9760 states and 43899 transitions. [2021-06-05 15:13:12,272 INFO L78 Accepts]: Start accepts. Automaton has 9760 states and 43899 transitions. Word has length 30 [2021-06-05 15:13:12,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:12,272 INFO L482 AbstractCegarLoop]: Abstraction has 9760 states and 43899 transitions. [2021-06-05 15:13:12,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 9760 states and 43899 transitions. [2021-06-05 15:13:12,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:12,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:12,289 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:12,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable789,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:12,489 INFO L430 AbstractCegarLoop]: === Iteration 331 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:12,489 INFO L82 PathProgramCache]: Analyzing trace with hash 451788468, now seen corresponding path program 79 times [2021-06-05 15:13:12,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:12,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958423401] [2021-06-05 15:13:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:12,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:12,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958423401] [2021-06-05 15:13:12,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958423401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:12,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772331776] [2021-06-05 15:13:12,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:12,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:12,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:12,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:12,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:12,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:12,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:12,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:13:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:12,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772331776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:12,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:12,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:13:12,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704295461] [2021-06-05 15:13:12,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:13:12,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:12,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:13:12,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:13:12,823 INFO L87 Difference]: Start difference. First operand 9760 states and 43899 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:15,740 INFO L93 Difference]: Finished difference Result 16060 states and 68064 transitions. [2021-06-05 15:13:15,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 15:13:15,740 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:15,781 INFO L225 Difference]: With dead ends: 16060 [2021-06-05 15:13:15,781 INFO L226 Difference]: Without dead ends: 15860 [2021-06-05 15:13:15,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1862 ImplicationChecksByTransitivity, 1564.1ms TimeCoverageRelationStatistics Valid=657, Invalid=4745, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 15:13:15,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15860 states. [2021-06-05 15:13:16,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15860 to 9850. [2021-06-05 15:13:16,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9850 states, 9849 states have (on average 4.50096456493045) internal successors, (44330), 9849 states have internal predecessors, (44330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9850 states to 9850 states and 44330 transitions. [2021-06-05 15:13:16,057 INFO L78 Accepts]: Start accepts. Automaton has 9850 states and 44330 transitions. Word has length 30 [2021-06-05 15:13:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:16,057 INFO L482 AbstractCegarLoop]: Abstraction has 9850 states and 44330 transitions. [2021-06-05 15:13:16,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:16,057 INFO L276 IsEmpty]: Start isEmpty. Operand 9850 states and 44330 transitions. [2021-06-05 15:13:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:16,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:16,074 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:16,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable791,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:16,274 INFO L430 AbstractCegarLoop]: === Iteration 332 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:16,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1712253756, now seen corresponding path program 81 times [2021-06-05 15:13:16,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:16,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389267133] [2021-06-05 15:13:16,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:16,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:16,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389267133] [2021-06-05 15:13:16,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389267133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:16,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589703335] [2021-06-05 15:13:16,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:16,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:13:16,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:16,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:13:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:16,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:16,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:13:16,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:16,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:16,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:16,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:13:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:16,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589703335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:16,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:16,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:13:16,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979306327] [2021-06-05 15:13:16,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:13:16,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:16,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:13:16,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:13:16,719 INFO L87 Difference]: Start difference. First operand 9850 states and 44330 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:19,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:19,885 INFO L93 Difference]: Finished difference Result 12561 states and 54808 transitions. [2021-06-05 15:13:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:13:19,885 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:19,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:19,915 INFO L225 Difference]: With dead ends: 12561 [2021-06-05 15:13:19,915 INFO L226 Difference]: Without dead ends: 12405 [2021-06-05 15:13:19,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 2325.6ms TimeCoverageRelationStatistics Valid=676, Invalid=4436, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:13:19,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12405 states. [2021-06-05 15:13:20,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12405 to 9865. [2021-06-05 15:13:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9865 states, 9864 states have (on average 4.5012165450121655) internal successors, (44400), 9864 states have internal predecessors, (44400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:20,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9865 states to 9865 states and 44400 transitions. [2021-06-05 15:13:20,144 INFO L78 Accepts]: Start accepts. Automaton has 9865 states and 44400 transitions. Word has length 30 [2021-06-05 15:13:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:20,144 INFO L482 AbstractCegarLoop]: Abstraction has 9865 states and 44400 transitions. [2021-06-05 15:13:20,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 9865 states and 44400 transitions. [2021-06-05 15:13:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:20,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:20,161 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:20,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:20,361 INFO L430 AbstractCegarLoop]: === Iteration 333 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:20,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:20,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1398727360, now seen corresponding path program 82 times [2021-06-05 15:13:20,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:20,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393565120] [2021-06-05 15:13:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:20,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:20,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393565120] [2021-06-05 15:13:20,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393565120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:20,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106134006] [2021-06-05 15:13:20,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:20,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:20,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:20,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:20,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:20,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:20,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:20,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:20,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:20,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:13:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:20,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106134006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:20,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:20,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:13:20,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164271580] [2021-06-05 15:13:20,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:20,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:20,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:20,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:20,710 INFO L87 Difference]: Start difference. First operand 9865 states and 44400 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:23,793 INFO L93 Difference]: Finished difference Result 13360 states and 58203 transitions. [2021-06-05 15:13:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 15:13:23,794 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:23,823 INFO L225 Difference]: With dead ends: 13360 [2021-06-05 15:13:23,823 INFO L226 Difference]: Without dead ends: 13261 [2021-06-05 15:13:23,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 2296.9ms TimeCoverageRelationStatistics Valid=960, Invalid=4740, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 15:13:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13261 states. [2021-06-05 15:13:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13261 to 9871. [2021-06-05 15:13:24,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9871 states, 9870 states have (on average 4.5013171225937185) internal successors, (44428), 9870 states have internal predecessors, (44428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:24,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9871 states to 9871 states and 44428 transitions. [2021-06-05 15:13:24,044 INFO L78 Accepts]: Start accepts. Automaton has 9871 states and 44428 transitions. Word has length 30 [2021-06-05 15:13:24,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:24,044 INFO L482 AbstractCegarLoop]: Abstraction has 9871 states and 44428 transitions. [2021-06-05 15:13:24,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:24,045 INFO L276 IsEmpty]: Start isEmpty. Operand 9871 states and 44428 transitions. [2021-06-05 15:13:24,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:24,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:24,061 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:24,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-06-05 15:13:24,262 INFO L430 AbstractCegarLoop]: === Iteration 334 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:24,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:24,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1286149214, now seen corresponding path program 83 times [2021-06-05 15:13:24,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:24,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207981798] [2021-06-05 15:13:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:24,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:24,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207981798] [2021-06-05 15:13:24,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207981798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:24,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014285778] [2021-06-05 15:13:24,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:24,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:13:24,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:24,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:24,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:24,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:24,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:24,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:24,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:24,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:13:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:24,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014285778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:24,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:24,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:13:24,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968035019] [2021-06-05 15:13:24,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:13:24,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:24,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:13:24,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:13:24,626 INFO L87 Difference]: Start difference. First operand 9871 states and 44428 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:26,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:26,864 INFO L93 Difference]: Finished difference Result 12456 states and 54560 transitions. [2021-06-05 15:13:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:13:26,864 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:26,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:26,895 INFO L225 Difference]: With dead ends: 12456 [2021-06-05 15:13:26,895 INFO L226 Difference]: Without dead ends: 12383 [2021-06-05 15:13:26,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1589.9ms TimeCoverageRelationStatistics Valid=619, Invalid=3413, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:13:26,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12383 states. [2021-06-05 15:13:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12383 to 9877. [2021-06-05 15:13:27,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9877 states, 9876 states have (on average 4.501316322397732) internal successors, (44455), 9876 states have internal predecessors, (44455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9877 states to 9877 states and 44455 transitions. [2021-06-05 15:13:27,217 INFO L78 Accepts]: Start accepts. Automaton has 9877 states and 44455 transitions. Word has length 30 [2021-06-05 15:13:27,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:27,217 INFO L482 AbstractCegarLoop]: Abstraction has 9877 states and 44455 transitions. [2021-06-05 15:13:27,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:27,217 INFO L276 IsEmpty]: Start isEmpty. Operand 9877 states and 44455 transitions. [2021-06-05 15:13:27,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:27,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:27,235 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:27,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-06-05 15:13:27,435 INFO L430 AbstractCegarLoop]: === Iteration 335 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:27,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:27,436 INFO L82 PathProgramCache]: Analyzing trace with hash -621746472, now seen corresponding path program 84 times [2021-06-05 15:13:27,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:27,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172070839] [2021-06-05 15:13:27,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:27,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:27,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172070839] [2021-06-05 15:13:27,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172070839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:27,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77665686] [2021-06-05 15:13:27,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:27,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:13:27,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:27,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:13:27,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:27,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:27,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:27,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:27,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:13:27,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:27,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:27,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:27,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-05 15:13:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:27,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77665686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:27,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:27,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:13:27,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395755323] [2021-06-05 15:13:27,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:13:27,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:27,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:13:27,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:13:27,945 INFO L87 Difference]: Start difference. First operand 9877 states and 44455 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:31,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:31,150 INFO L93 Difference]: Finished difference Result 12108 states and 53087 transitions. [2021-06-05 15:13:31,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:13:31,150 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:31,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:31,177 INFO L225 Difference]: With dead ends: 12108 [2021-06-05 15:13:31,177 INFO L226 Difference]: Without dead ends: 11938 [2021-06-05 15:13:31,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 2477.4ms TimeCoverageRelationStatistics Valid=823, Invalid=4579, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 15:13:31,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11938 states. [2021-06-05 15:13:31,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11938 to 9893. [2021-06-05 15:13:31,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9893 states, 9892 states have (on average 4.4992923574605745) internal successors, (44507), 9892 states have internal predecessors, (44507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9893 states to 9893 states and 44507 transitions. [2021-06-05 15:13:31,484 INFO L78 Accepts]: Start accepts. Automaton has 9893 states and 44507 transitions. Word has length 30 [2021-06-05 15:13:31,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:31,485 INFO L482 AbstractCegarLoop]: Abstraction has 9893 states and 44507 transitions. [2021-06-05 15:13:31,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 9893 states and 44507 transitions. [2021-06-05 15:13:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:31,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:31,502 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:31,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable797 [2021-06-05 15:13:31,702 INFO L430 AbstractCegarLoop]: === Iteration 336 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:31,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:31,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2115156472, now seen corresponding path program 85 times [2021-06-05 15:13:31,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:31,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473972143] [2021-06-05 15:13:31,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:31,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:31,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473972143] [2021-06-05 15:13:31,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473972143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:31,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312644616] [2021-06-05 15:13:31,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:31,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:31,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:31,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:31,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:31,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:31,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:31,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:13:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:32,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312644616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:32,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:32,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:13:32,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749233600] [2021-06-05 15:13:32,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:32,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:32,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:32,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:32,058 INFO L87 Difference]: Start difference. First operand 9893 states and 44507 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:34,779 INFO L93 Difference]: Finished difference Result 13712 states and 59410 transitions. [2021-06-05 15:13:34,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:13:34,779 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:34,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:34,813 INFO L225 Difference]: With dead ends: 13712 [2021-06-05 15:13:34,813 INFO L226 Difference]: Without dead ends: 13619 [2021-06-05 15:13:34,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 1846.2ms TimeCoverageRelationStatistics Valid=983, Invalid=5023, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:13:34,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13619 states. [2021-06-05 15:13:35,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13619 to 9881. [2021-06-05 15:13:35,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9881 states, 9880 states have (on average 4.5012145748987855) internal successors, (44472), 9880 states have internal predecessors, (44472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:35,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9881 states to 9881 states and 44472 transitions. [2021-06-05 15:13:35,066 INFO L78 Accepts]: Start accepts. Automaton has 9881 states and 44472 transitions. Word has length 30 [2021-06-05 15:13:35,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:35,066 INFO L482 AbstractCegarLoop]: Abstraction has 9881 states and 44472 transitions. [2021-06-05 15:13:35,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 9881 states and 44472 transitions. [2021-06-05 15:13:35,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:35,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:35,084 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:35,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable802,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:35,285 INFO L430 AbstractCegarLoop]: === Iteration 337 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:35,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2004949928, now seen corresponding path program 86 times [2021-06-05 15:13:35,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:35,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132406985] [2021-06-05 15:13:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:35,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:35,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132406985] [2021-06-05 15:13:35,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132406985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:35,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124769593] [2021-06-05 15:13:35,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:35,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:35,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:35,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:13:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:35,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:35,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:13:35,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:35,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:35,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:35,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:13:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:35,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124769593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:35,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:35,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:13:35,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346999853] [2021-06-05 15:13:35,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:13:35,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:35,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:13:35,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:13:35,723 INFO L87 Difference]: Start difference. First operand 9881 states and 44472 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:39,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:39,164 INFO L93 Difference]: Finished difference Result 14002 states and 60636 transitions. [2021-06-05 15:13:39,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 15:13:39,165 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:39,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:39,198 INFO L225 Difference]: With dead ends: 14002 [2021-06-05 15:13:39,198 INFO L226 Difference]: Without dead ends: 13695 [2021-06-05 15:13:39,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 2429.3ms TimeCoverageRelationStatistics Valid=962, Invalid=5200, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:13:39,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13695 states. [2021-06-05 15:13:39,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13695 to 9901. [2021-06-05 15:13:39,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9901 states, 9900 states have (on average 4.502020202020202) internal successors, (44570), 9900 states have internal predecessors, (44570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9901 states to 9901 states and 44570 transitions. [2021-06-05 15:13:39,445 INFO L78 Accepts]: Start accepts. Automaton has 9901 states and 44570 transitions. Word has length 30 [2021-06-05 15:13:39,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:39,445 INFO L482 AbstractCegarLoop]: Abstraction has 9901 states and 44570 transitions. [2021-06-05 15:13:39,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 9901 states and 44570 transitions. [2021-06-05 15:13:39,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:39,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:39,463 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:39,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable803,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:39,663 INFO L430 AbstractCegarLoop]: === Iteration 338 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:39,663 INFO L82 PathProgramCache]: Analyzing trace with hash 530726706, now seen corresponding path program 87 times [2021-06-05 15:13:39,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:39,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880864004] [2021-06-05 15:13:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:39,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:39,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880864004] [2021-06-05 15:13:39,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880864004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:39,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174509446] [2021-06-05 15:13:39,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:39,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:13:39,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:39,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:13:39,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:39,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:39,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:13:39,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:39,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:39,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:39,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:13:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:40,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174509446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:40,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:40,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:13:40,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665351009] [2021-06-05 15:13:40,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:13:40,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:40,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:13:40,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:13:40,103 INFO L87 Difference]: Start difference. First operand 9901 states and 44570 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:42,993 INFO L93 Difference]: Finished difference Result 13470 states and 58641 transitions. [2021-06-05 15:13:42,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 15:13:42,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:42,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:43,025 INFO L225 Difference]: With dead ends: 13470 [2021-06-05 15:13:43,025 INFO L226 Difference]: Without dead ends: 13308 [2021-06-05 15:13:43,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 2114.6ms TimeCoverageRelationStatistics Valid=918, Invalid=5088, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:13:43,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13308 states. [2021-06-05 15:13:43,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13308 to 9887. [2021-06-05 15:13:43,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9887 states, 9886 states have (on average 4.50283228808416) internal successors, (44515), 9886 states have internal predecessors, (44515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9887 states to 9887 states and 44515 transitions. [2021-06-05 15:13:43,256 INFO L78 Accepts]: Start accepts. Automaton has 9887 states and 44515 transitions. Word has length 30 [2021-06-05 15:13:43,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:43,257 INFO L482 AbstractCegarLoop]: Abstraction has 9887 states and 44515 transitions. [2021-06-05 15:13:43,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:43,257 INFO L276 IsEmpty]: Start isEmpty. Operand 9887 states and 44515 transitions. [2021-06-05 15:13:43,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:43,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:43,274 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:43,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:43,474 INFO L430 AbstractCegarLoop]: === Iteration 339 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:43,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:43,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2078016704, now seen corresponding path program 80 times [2021-06-05 15:13:43,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:43,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117523762] [2021-06-05 15:13:43,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:43,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:43,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117523762] [2021-06-05 15:13:43,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117523762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:43,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520569804] [2021-06-05 15:13:43,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:43,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:43,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:43,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:13:43,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:43,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:43,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:13:43,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:43,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:43,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:43,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:13:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:43,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520569804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:43,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:43,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:13:43,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701774897] [2021-06-05 15:13:43,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:43,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:43,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:43,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:43,875 INFO L87 Difference]: Start difference. First operand 9887 states and 44515 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:46,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:46,348 INFO L93 Difference]: Finished difference Result 12356 states and 54291 transitions. [2021-06-05 15:13:46,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 15:13:46,348 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:46,375 INFO L225 Difference]: With dead ends: 12356 [2021-06-05 15:13:46,376 INFO L226 Difference]: Without dead ends: 12267 [2021-06-05 15:13:46,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1803.0ms TimeCoverageRelationStatistics Valid=522, Invalid=3138, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:13:46,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12267 states. [2021-06-05 15:13:46,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12267 to 9919. [2021-06-05 15:13:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9919 states, 9918 states have (on average 4.502722323049002) internal successors, (44658), 9918 states have internal predecessors, (44658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9919 states to 9919 states and 44658 transitions. [2021-06-05 15:13:46,604 INFO L78 Accepts]: Start accepts. Automaton has 9919 states and 44658 transitions. Word has length 30 [2021-06-05 15:13:46,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:46,604 INFO L482 AbstractCegarLoop]: Abstraction has 9919 states and 44658 transitions. [2021-06-05 15:13:46,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:46,604 INFO L276 IsEmpty]: Start isEmpty. Operand 9919 states and 44658 transitions. [2021-06-05 15:13:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:46,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:46,621 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:46,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable809 [2021-06-05 15:13:46,822 INFO L430 AbstractCegarLoop]: === Iteration 340 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:46,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:46,822 INFO L82 PathProgramCache]: Analyzing trace with hash -381896878, now seen corresponding path program 81 times [2021-06-05 15:13:46,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:46,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693941161] [2021-06-05 15:13:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:46,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:46,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693941161] [2021-06-05 15:13:46,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693941161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:46,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979456951] [2021-06-05 15:13:46,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:46,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:13:46,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:46,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:13:46,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:47,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:47,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:13:47,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:47,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:47,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:47,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:13:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:47,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979456951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:47,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:47,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:13:47,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453257503] [2021-06-05 15:13:47,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:13:47,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:47,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:13:47,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:13:47,239 INFO L87 Difference]: Start difference. First operand 9919 states and 44658 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:50,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:50,052 INFO L93 Difference]: Finished difference Result 12453 states and 54704 transitions. [2021-06-05 15:13:50,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:13:50,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:50,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:50,083 INFO L225 Difference]: With dead ends: 12453 [2021-06-05 15:13:50,083 INFO L226 Difference]: Without dead ends: 12313 [2021-06-05 15:13:50,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 1953.9ms TimeCoverageRelationStatistics Valid=635, Invalid=3525, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:13:50,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12313 states. [2021-06-05 15:13:50,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12313 to 9913. [2021-06-05 15:13:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9913 states, 9912 states have (on average 4.5026230831315575) internal successors, (44630), 9912 states have internal predecessors, (44630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:50,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9913 states to 9913 states and 44630 transitions. [2021-06-05 15:13:50,311 INFO L78 Accepts]: Start accepts. Automaton has 9913 states and 44630 transitions. Word has length 30 [2021-06-05 15:13:50,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:50,311 INFO L482 AbstractCegarLoop]: Abstraction has 9913 states and 44630 transitions. [2021-06-05 15:13:50,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:50,312 INFO L276 IsEmpty]: Start isEmpty. Operand 9913 states and 44630 transitions. [2021-06-05 15:13:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:50,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:50,329 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:50,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-06-05 15:13:50,529 INFO L430 AbstractCegarLoop]: === Iteration 341 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:50,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1621731686, now seen corresponding path program 82 times [2021-06-05 15:13:50,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:50,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560716053] [2021-06-05 15:13:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:50,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:50,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560716053] [2021-06-05 15:13:50,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560716053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:50,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225114963] [2021-06-05 15:13:50,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:50,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:50,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:50,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:50,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:50,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:50,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:50,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:50,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:50,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:13:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:50,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225114963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:50,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:50,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:13:50,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251313778] [2021-06-05 15:13:50,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:13:50,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:50,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:13:50,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:13:50,847 INFO L87 Difference]: Start difference. First operand 9913 states and 44630 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:52,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:52,656 INFO L93 Difference]: Finished difference Result 12324 states and 54278 transitions. [2021-06-05 15:13:52,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:13:52,656 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:52,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:52,683 INFO L225 Difference]: With dead ends: 12324 [2021-06-05 15:13:52,684 INFO L226 Difference]: Without dead ends: 12231 [2021-06-05 15:13:52,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1243.9ms TimeCoverageRelationStatistics Valid=468, Invalid=2394, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:13:52,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12231 states. [2021-06-05 15:13:52,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12231 to 9908. [2021-06-05 15:13:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9908 states, 9907 states have (on average 4.501665489048148) internal successors, (44598), 9907 states have internal predecessors, (44598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:52,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9908 states to 9908 states and 44598 transitions. [2021-06-05 15:13:52,970 INFO L78 Accepts]: Start accepts. Automaton has 9908 states and 44598 transitions. Word has length 30 [2021-06-05 15:13:52,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:52,970 INFO L482 AbstractCegarLoop]: Abstraction has 9908 states and 44598 transitions. [2021-06-05 15:13:52,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:52,970 INFO L276 IsEmpty]: Start isEmpty. Operand 9908 states and 44598 transitions. [2021-06-05 15:13:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:52,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:52,987 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:53,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:53,187 INFO L430 AbstractCegarLoop]: === Iteration 342 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:53,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:53,188 INFO L82 PathProgramCache]: Analyzing trace with hash -920386266, now seen corresponding path program 83 times [2021-06-05 15:13:53,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:53,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385866382] [2021-06-05 15:13:53,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:53,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:53,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385866382] [2021-06-05 15:13:53,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385866382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:53,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803370522] [2021-06-05 15:13:53,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:53,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:13:53,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:53,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:53,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:53,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:53,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:53,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:53,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:53,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:13:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:53,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803370522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:53,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:53,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:13:53,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694224455] [2021-06-05 15:13:53,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:13:53,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:53,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:13:53,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:13:53,524 INFO L87 Difference]: Start difference. First operand 9908 states and 44598 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:55,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:55,441 INFO L93 Difference]: Finished difference Result 12376 states and 54412 transitions. [2021-06-05 15:13:55,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:13:55,441 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:55,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:55,471 INFO L225 Difference]: With dead ends: 12376 [2021-06-05 15:13:55,471 INFO L226 Difference]: Without dead ends: 12303 [2021-06-05 15:13:55,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1380.0ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:13:55,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12303 states. [2021-06-05 15:13:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12303 to 9928. [2021-06-05 15:13:55,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9928 states, 9927 states have (on average 4.501460662838722) internal successors, (44686), 9927 states have internal predecessors, (44686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9928 states to 9928 states and 44686 transitions. [2021-06-05 15:13:55,701 INFO L78 Accepts]: Start accepts. Automaton has 9928 states and 44686 transitions. Word has length 30 [2021-06-05 15:13:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:55,701 INFO L482 AbstractCegarLoop]: Abstraction has 9928 states and 44686 transitions. [2021-06-05 15:13:55,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 9928 states and 44686 transitions. [2021-06-05 15:13:55,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:55,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:55,718 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:55,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-06-05 15:13:55,919 INFO L430 AbstractCegarLoop]: === Iteration 343 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:55,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:55,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1172443720, now seen corresponding path program 84 times [2021-06-05 15:13:55,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:55,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426599361] [2021-06-05 15:13:55,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:56,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:56,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426599361] [2021-06-05 15:13:56,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426599361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:56,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831607224] [2021-06-05 15:13:56,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:56,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:13:56,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:56,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:56,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:56,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:56,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:56,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:13:56,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:56,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:56,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:56,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:49 [2021-06-05 15:13:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:56,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831607224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:56,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:56,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:13:56,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133011709] [2021-06-05 15:13:56,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:13:56,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:56,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:13:56,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:13:56,420 INFO L87 Difference]: Start difference. First operand 9928 states and 44686 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:56,840 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2021-06-05 15:13:58,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:58,806 INFO L93 Difference]: Finished difference Result 11482 states and 50761 transitions. [2021-06-05 15:13:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:13:58,806 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:13:58,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:58,832 INFO L225 Difference]: With dead ends: 11482 [2021-06-05 15:13:58,832 INFO L226 Difference]: Without dead ends: 11330 [2021-06-05 15:13:58,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1898.9ms TimeCoverageRelationStatistics Valid=489, Invalid=3543, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:13:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11330 states. [2021-06-05 15:13:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11330 to 9925. [2021-06-05 15:13:59,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9925 states, 9924 states have (on average 4.501511487303507) internal successors, (44673), 9924 states have internal predecessors, (44673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9925 states to 9925 states and 44673 transitions. [2021-06-05 15:13:59,047 INFO L78 Accepts]: Start accepts. Automaton has 9925 states and 44673 transitions. Word has length 30 [2021-06-05 15:13:59,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:59,047 INFO L482 AbstractCegarLoop]: Abstraction has 9925 states and 44673 transitions. [2021-06-05 15:13:59,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:59,047 INFO L276 IsEmpty]: Start isEmpty. Operand 9925 states and 44673 transitions. [2021-06-05 15:13:59,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:13:59,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:59,064 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:59,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:59,265 INFO L430 AbstractCegarLoop]: === Iteration 344 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:59,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:59,265 INFO L82 PathProgramCache]: Analyzing trace with hash 708148730, now seen corresponding path program 85 times [2021-06-05 15:13:59,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:59,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599229902] [2021-06-05 15:13:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:59,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:59,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599229902] [2021-06-05 15:13:59,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599229902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:59,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881050201] [2021-06-05 15:13:59,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:59,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:59,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:59,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:59,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:59,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:59,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:59,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:13:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:59,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881050201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:59,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:59,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:13:59,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734147654] [2021-06-05 15:13:59,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:59,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:59,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:59,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:59,600 INFO L87 Difference]: Start difference. First operand 9925 states and 44673 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:01,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:01,974 INFO L93 Difference]: Finished difference Result 13508 states and 58566 transitions. [2021-06-05 15:14:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 15:14:01,975 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:02,006 INFO L225 Difference]: With dead ends: 13508 [2021-06-05 15:14:02,006 INFO L226 Difference]: Without dead ends: 13423 [2021-06-05 15:14:02,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 1725.2ms TimeCoverageRelationStatistics Valid=862, Invalid=4394, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:14:02,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13423 states. [2021-06-05 15:14:02,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13423 to 9924. [2021-06-05 15:14:02,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9924 states, 9923 states have (on average 4.501158923712587) internal successors, (44665), 9923 states have internal predecessors, (44665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9924 states to 9924 states and 44665 transitions. [2021-06-05 15:14:02,245 INFO L78 Accepts]: Start accepts. Automaton has 9924 states and 44665 transitions. Word has length 30 [2021-06-05 15:14:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:02,246 INFO L482 AbstractCegarLoop]: Abstraction has 9924 states and 44665 transitions. [2021-06-05 15:14:02,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 9924 states and 44665 transitions. [2021-06-05 15:14:02,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:02,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:02,263 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:02,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-06-05 15:14:02,463 INFO L430 AbstractCegarLoop]: === Iteration 345 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:02,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:02,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1724677896, now seen corresponding path program 86 times [2021-06-05 15:14:02,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:02,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867915175] [2021-06-05 15:14:02,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:02,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:02,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867915175] [2021-06-05 15:14:02,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867915175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:02,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716772554] [2021-06-05 15:14:02,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:02,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:02,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:02,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:14:02,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:02,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:02,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:14:02,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:02,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:02,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:02,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:14:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:02,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716772554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:02,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:02,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:14:02,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067574163] [2021-06-05 15:14:02,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:02,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:02,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:02,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:02,851 INFO L87 Difference]: Start difference. First operand 9924 states and 44665 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:06,487 INFO L93 Difference]: Finished difference Result 14061 states and 61050 transitions. [2021-06-05 15:14:06,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 15:14:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:06,521 INFO L225 Difference]: With dead ends: 14061 [2021-06-05 15:14:06,521 INFO L226 Difference]: Without dead ends: 13905 [2021-06-05 15:14:06,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2561 ImplicationChecksByTransitivity, 2574.1ms TimeCoverageRelationStatistics Valid=1127, Invalid=6355, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 15:14:06,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13905 states. [2021-06-05 15:14:06,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13905 to 9934. [2021-06-05 15:14:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9934 states, 9933 states have (on average 4.500151011778919) internal successors, (44700), 9933 states have internal predecessors, (44700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:06,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9934 states to 9934 states and 44700 transitions. [2021-06-05 15:14:06,775 INFO L78 Accepts]: Start accepts. Automaton has 9934 states and 44700 transitions. Word has length 30 [2021-06-05 15:14:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:06,776 INFO L482 AbstractCegarLoop]: Abstraction has 9934 states and 44700 transitions. [2021-06-05 15:14:06,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand 9934 states and 44700 transitions. [2021-06-05 15:14:06,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:06,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:06,793 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:06,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable821,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:06,994 INFO L430 AbstractCegarLoop]: === Iteration 346 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:06,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:06,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1933822546, now seen corresponding path program 87 times [2021-06-05 15:14:06,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:06,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047477226] [2021-06-05 15:14:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:07,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:07,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047477226] [2021-06-05 15:14:07,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047477226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:07,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130371135] [2021-06-05 15:14:07,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:07,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:14:07,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:07,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:14:07,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:07,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:07,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:14:07,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:07,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:07,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:07,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:14:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:07,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130371135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:07,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:07,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:14:07,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640996844] [2021-06-05 15:14:07,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:07,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:07,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:07,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:07,377 INFO L87 Difference]: Start difference. First operand 9934 states and 44700 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:10,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:10,347 INFO L93 Difference]: Finished difference Result 14483 states and 62358 transitions. [2021-06-05 15:14:10,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 15:14:10,347 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:10,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:10,380 INFO L225 Difference]: With dead ends: 14483 [2021-06-05 15:14:10,380 INFO L226 Difference]: Without dead ends: 14412 [2021-06-05 15:14:10,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 2136.6ms TimeCoverageRelationStatistics Valid=1089, Invalid=5883, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 15:14:10,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14412 states. [2021-06-05 15:14:10,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14412 to 9915. [2021-06-05 15:14:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9915 states, 9914 states have (on average 4.499394795239056) internal successors, (44607), 9914 states have internal predecessors, (44607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:10,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9915 states to 9915 states and 44607 transitions. [2021-06-05 15:14:10,626 INFO L78 Accepts]: Start accepts. Automaton has 9915 states and 44607 transitions. Word has length 30 [2021-06-05 15:14:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:10,627 INFO L482 AbstractCegarLoop]: Abstraction has 9915 states and 44607 transitions. [2021-06-05 15:14:10,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 9915 states and 44607 transitions. [2021-06-05 15:14:10,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:10,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:10,644 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:10,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:10,844 INFO L430 AbstractCegarLoop]: === Iteration 347 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:10,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:10,845 INFO L82 PathProgramCache]: Analyzing trace with hash -803512398, now seen corresponding path program 88 times [2021-06-05 15:14:10,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:10,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48131097] [2021-06-05 15:14:10,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:11,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:11,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48131097] [2021-06-05 15:14:11,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48131097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:11,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563594325] [2021-06-05 15:14:11,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:11,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:11,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:11,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:11,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:11,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:14:11,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:11,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:11,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:11,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:14:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:11,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563594325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:11,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:11,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:14:11,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394750240] [2021-06-05 15:14:11,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:14:11,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:11,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:14:11,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:14:11,247 INFO L87 Difference]: Start difference. First operand 9915 states and 44607 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:13,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:13,367 INFO L93 Difference]: Finished difference Result 11313 states and 50234 transitions. [2021-06-05 15:14:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:14:13,367 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:13,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:13,394 INFO L225 Difference]: With dead ends: 11313 [2021-06-05 15:14:13,394 INFO L226 Difference]: Without dead ends: 11199 [2021-06-05 15:14:13,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1743.5ms TimeCoverageRelationStatistics Valid=524, Invalid=2782, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:14:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11199 states. [2021-06-05 15:14:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11199 to 9949. [2021-06-05 15:14:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9949 states, 9948 states have (on average 4.497587454764777) internal successors, (44742), 9948 states have internal predecessors, (44742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:13,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9949 states to 9949 states and 44742 transitions. [2021-06-05 15:14:13,682 INFO L78 Accepts]: Start accepts. Automaton has 9949 states and 44742 transitions. Word has length 30 [2021-06-05 15:14:13,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:13,682 INFO L482 AbstractCegarLoop]: Abstraction has 9949 states and 44742 transitions. [2021-06-05 15:14:13,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:13,682 INFO L276 IsEmpty]: Start isEmpty. Operand 9949 states and 44742 transitions. [2021-06-05 15:14:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:13,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:13,699 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:13,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable826 [2021-06-05 15:14:13,899 INFO L430 AbstractCegarLoop]: === Iteration 348 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:13,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1117038794, now seen corresponding path program 89 times [2021-06-05 15:14:13,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:13,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980332765] [2021-06-05 15:14:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:14,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:14,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980332765] [2021-06-05 15:14:14,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980332765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:14,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162219474] [2021-06-05 15:14:14,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:14,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:14:14,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:14,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:14,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:14,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:14:14,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:14,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:14,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:14,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:14:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:14,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162219474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:14,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:14,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:14:14,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221270168] [2021-06-05 15:14:14,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:14,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:14,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:14,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:14,320 INFO L87 Difference]: Start difference. First operand 9949 states and 44742 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:16,504 INFO L93 Difference]: Finished difference Result 11456 states and 50794 transitions. [2021-06-05 15:14:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:14:16,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:16,530 INFO L225 Difference]: With dead ends: 11456 [2021-06-05 15:14:16,530 INFO L226 Difference]: Without dead ends: 11310 [2021-06-05 15:14:16,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1770.2ms TimeCoverageRelationStatistics Valid=611, Invalid=2929, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:14:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11310 states. [2021-06-05 15:14:16,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11310 to 9936. [2021-06-05 15:14:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9936 states, 9935 states have (on average 4.498238550578762) internal successors, (44690), 9935 states have internal predecessors, (44690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9936 states to 9936 states and 44690 transitions. [2021-06-05 15:14:16,741 INFO L78 Accepts]: Start accepts. Automaton has 9936 states and 44690 transitions. Word has length 30 [2021-06-05 15:14:16,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:16,741 INFO L482 AbstractCegarLoop]: Abstraction has 9936 states and 44690 transitions. [2021-06-05 15:14:16,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:16,741 INFO L276 IsEmpty]: Start isEmpty. Operand 9936 states and 44690 transitions. [2021-06-05 15:14:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:16,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:16,759 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:16,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:16,959 INFO L430 AbstractCegarLoop]: === Iteration 349 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:16,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:16,959 INFO L82 PathProgramCache]: Analyzing trace with hash 341530762, now seen corresponding path program 90 times [2021-06-05 15:14:16,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:16,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696555528] [2021-06-05 15:14:16,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:17,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:17,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696555528] [2021-06-05 15:14:17,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696555528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:17,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997317680] [2021-06-05 15:14:17,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:17,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:14:17,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:17,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:17,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:17,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:17,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:17,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:14:17,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:14:17,381 INFO L628 ElimStorePlain]: treesize reduction 68, result has 24.4 percent of original size [2021-06-05 15:14:17,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:17,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 15:14:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:17,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997317680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:17,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:17,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:14:17,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050875580] [2021-06-05 15:14:17,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:14:17,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:17,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:14:17,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:14:17,484 INFO L87 Difference]: Start difference. First operand 9936 states and 44690 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:19,353 INFO L93 Difference]: Finished difference Result 11730 states and 51618 transitions. [2021-06-05 15:14:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:14:19,353 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:19,379 INFO L225 Difference]: With dead ends: 11730 [2021-06-05 15:14:19,379 INFO L226 Difference]: Without dead ends: 11391 [2021-06-05 15:14:19,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1203.2ms TimeCoverageRelationStatistics Valid=328, Invalid=2024, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:14:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11391 states. [2021-06-05 15:14:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11391 to 9963. [2021-06-05 15:14:19,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9963 states, 9962 states have (on average 4.498092752459345) internal successors, (44810), 9962 states have internal predecessors, (44810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9963 states to 9963 states and 44810 transitions. [2021-06-05 15:14:19,589 INFO L78 Accepts]: Start accepts. Automaton has 9963 states and 44810 transitions. Word has length 30 [2021-06-05 15:14:19,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:19,589 INFO L482 AbstractCegarLoop]: Abstraction has 9963 states and 44810 transitions. [2021-06-05 15:14:19,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:19,590 INFO L276 IsEmpty]: Start isEmpty. Operand 9963 states and 44810 transitions. [2021-06-05 15:14:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:19,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:19,607 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:19,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:19,808 INFO L430 AbstractCegarLoop]: === Iteration 350 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:19,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1223452426, now seen corresponding path program 33 times [2021-06-05 15:14:19,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:19,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441650678] [2021-06-05 15:14:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:19,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:19,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441650678] [2021-06-05 15:14:19,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441650678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:19,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333116555] [2021-06-05 15:14:19,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:19,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:14:19,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:19,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:19,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:20,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:14:20,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:20,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:20,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:20,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:14:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:20,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333116555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:20,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:20,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:14:20,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642840184] [2021-06-05 15:14:20,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:20,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:20,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:20,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:20,174 INFO L87 Difference]: Start difference. First operand 9963 states and 44810 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:21,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:21,793 INFO L93 Difference]: Finished difference Result 12053 states and 53034 transitions. [2021-06-05 15:14:21,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:14:21,794 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:21,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:21,822 INFO L225 Difference]: With dead ends: 12053 [2021-06-05 15:14:21,822 INFO L226 Difference]: Without dead ends: 11739 [2021-06-05 15:14:21,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1119.3ms TimeCoverageRelationStatistics Valid=530, Invalid=2662, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:14:21,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11739 states. [2021-06-05 15:14:22,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11739 to 9985. [2021-06-05 15:14:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9985 states, 9984 states have (on average 4.496193910256411) internal successors, (44890), 9984 states have internal predecessors, (44890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9985 states to 9985 states and 44890 transitions. [2021-06-05 15:14:22,085 INFO L78 Accepts]: Start accepts. Automaton has 9985 states and 44890 transitions. Word has length 30 [2021-06-05 15:14:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:22,085 INFO L482 AbstractCegarLoop]: Abstraction has 9985 states and 44890 transitions. [2021-06-05 15:14:22,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand 9985 states and 44890 transitions. [2021-06-05 15:14:22,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:22,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:22,102 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:22,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable833 [2021-06-05 15:14:22,303 INFO L430 AbstractCegarLoop]: === Iteration 351 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash -519083462, now seen corresponding path program 34 times [2021-06-05 15:14:22,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:22,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134711731] [2021-06-05 15:14:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:22,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:22,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134711731] [2021-06-05 15:14:22,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134711731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:22,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219077078] [2021-06-05 15:14:22,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:22,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:22,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:22,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:22,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:22,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:14:22,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:22,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:22,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:22,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:14:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:22,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219077078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:22,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:22,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:14:22,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711777736] [2021-06-05 15:14:22,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:14:22,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:22,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:14:22,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:14:22,675 INFO L87 Difference]: Start difference. First operand 9985 states and 44890 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:24,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:24,415 INFO L93 Difference]: Finished difference Result 11647 states and 51501 transitions. [2021-06-05 15:14:24,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:14:24,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:24,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:24,441 INFO L225 Difference]: With dead ends: 11647 [2021-06-05 15:14:24,441 INFO L226 Difference]: Without dead ends: 11511 [2021-06-05 15:14:24,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1343.4ms TimeCoverageRelationStatistics Valid=413, Invalid=2239, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:14:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11511 states. [2021-06-05 15:14:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11511 to 9999. [2021-06-05 15:14:24,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9999 states, 9998 states have (on average 4.496699339867973) internal successors, (44958), 9998 states have internal predecessors, (44958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9999 states to 9999 states and 44958 transitions. [2021-06-05 15:14:24,649 INFO L78 Accepts]: Start accepts. Automaton has 9999 states and 44958 transitions. Word has length 30 [2021-06-05 15:14:24,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:24,649 INFO L482 AbstractCegarLoop]: Abstraction has 9999 states and 44958 transitions. [2021-06-05 15:14:24,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 9999 states and 44958 transitions. [2021-06-05 15:14:24,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:24,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:24,666 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:24,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:24,867 INFO L430 AbstractCegarLoop]: === Iteration 352 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:24,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:24,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1051840444, now seen corresponding path program 35 times [2021-06-05 15:14:24,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:24,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360879273] [2021-06-05 15:14:24,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:25,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:25,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360879273] [2021-06-05 15:14:25,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360879273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:25,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115693551] [2021-06-05 15:14:25,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:25,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:14:25,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:25,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:25,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:25,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:25,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:25,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:25,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:25,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 15:14:25,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:25,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:25,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:25,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:91 [2021-06-05 15:14:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:25,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115693551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:25,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:25,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 15:14:25,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785488769] [2021-06-05 15:14:25,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:25,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:25,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:25,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:25,335 INFO L87 Difference]: Start difference. First operand 9999 states and 44958 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:26,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:26,591 INFO L93 Difference]: Finished difference Result 11008 states and 48963 transitions. [2021-06-05 15:14:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:14:26,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:26,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:26,616 INFO L225 Difference]: With dead ends: 11008 [2021-06-05 15:14:26,616 INFO L226 Difference]: Without dead ends: 10933 [2021-06-05 15:14:26,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 948.2ms TimeCoverageRelationStatistics Valid=223, Invalid=1337, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:14:26,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10933 states. [2021-06-05 15:14:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10933 to 10018. [2021-06-05 15:14:26,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10018 states, 10017 states have (on average 4.495158231007288) internal successors, (45028), 10017 states have internal predecessors, (45028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10018 states to 10018 states and 45028 transitions. [2021-06-05 15:14:26,816 INFO L78 Accepts]: Start accepts. Automaton has 10018 states and 45028 transitions. Word has length 30 [2021-06-05 15:14:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:26,816 INFO L482 AbstractCegarLoop]: Abstraction has 10018 states and 45028 transitions. [2021-06-05 15:14:26,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:26,816 INFO L276 IsEmpty]: Start isEmpty. Operand 10018 states and 45028 transitions. [2021-06-05 15:14:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:26,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:26,833 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:27,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable835,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:27,034 INFO L430 AbstractCegarLoop]: === Iteration 353 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:27,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:27,034 INFO L82 PathProgramCache]: Analyzing trace with hash -170306532, now seen corresponding path program 36 times [2021-06-05 15:14:27,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:27,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917691331] [2021-06-05 15:14:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:27,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:27,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917691331] [2021-06-05 15:14:27,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917691331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:27,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245961411] [2021-06-05 15:14:27,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:27,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:14:27,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:27,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:14:27,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:27,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:27,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:14:27,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:27,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:27,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:27,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:14:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:27,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245961411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:27,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:27,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:14:27,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534733190] [2021-06-05 15:14:27,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:27,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:27,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:27,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:27,483 INFO L87 Difference]: Start difference. First operand 10018 states and 45028 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:29,555 INFO L93 Difference]: Finished difference Result 11856 states and 52141 transitions. [2021-06-05 15:14:29,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:14:29,555 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:29,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:29,582 INFO L225 Difference]: With dead ends: 11856 [2021-06-05 15:14:29,582 INFO L226 Difference]: Without dead ends: 11547 [2021-06-05 15:14:29,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1597.1ms TimeCoverageRelationStatistics Valid=556, Invalid=2984, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:14:29,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11547 states. [2021-06-05 15:14:29,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11547 to 10005. [2021-06-05 15:14:29,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 4.495701719312275) internal successors, (44975), 10004 states have internal predecessors, (44975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 44975 transitions. [2021-06-05 15:14:29,886 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 44975 transitions. Word has length 30 [2021-06-05 15:14:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:29,886 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 44975 transitions. [2021-06-05 15:14:29,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 44975 transitions. [2021-06-05 15:14:29,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:29,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:29,903 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:30,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable841,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:30,104 INFO L430 AbstractCegarLoop]: === Iteration 354 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:30,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:30,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1209309202, now seen corresponding path program 91 times [2021-06-05 15:14:30,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:30,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955948361] [2021-06-05 15:14:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:30,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:30,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955948361] [2021-06-05 15:14:30,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955948361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:30,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375376121] [2021-06-05 15:14:30,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:30,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:30,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:30,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:30,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:14:30,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:30,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:30,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:30,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:14:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:30,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375376121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:30,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:30,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:14:30,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871821807] [2021-06-05 15:14:30,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:14:30,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:30,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:14:30,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:14:30,492 INFO L87 Difference]: Start difference. First operand 10005 states and 44975 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:32,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:32,577 INFO L93 Difference]: Finished difference Result 11411 states and 50619 transitions. [2021-06-05 15:14:32,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:14:32,577 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:32,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:32,602 INFO L225 Difference]: With dead ends: 11411 [2021-06-05 15:14:32,602 INFO L226 Difference]: Without dead ends: 11297 [2021-06-05 15:14:32,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1613.5ms TimeCoverageRelationStatistics Valid=464, Invalid=2506, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:14:32,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11297 states. [2021-06-05 15:14:32,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11297 to 10021. [2021-06-05 15:14:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10021 states, 10020 states have (on average 4.494810379241517) internal successors, (45038), 10020 states have internal predecessors, (45038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10021 states to 10021 states and 45038 transitions. [2021-06-05 15:14:32,803 INFO L78 Accepts]: Start accepts. Automaton has 10021 states and 45038 transitions. Word has length 30 [2021-06-05 15:14:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:32,803 INFO L482 AbstractCegarLoop]: Abstraction has 10021 states and 45038 transitions. [2021-06-05 15:14:32,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:32,803 INFO L276 IsEmpty]: Start isEmpty. Operand 10021 states and 45038 transitions. [2021-06-05 15:14:32,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:32,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:32,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:33,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 15:14:33,020 INFO L430 AbstractCegarLoop]: === Iteration 355 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:33,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:33,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1522835598, now seen corresponding path program 92 times [2021-06-05 15:14:33,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:33,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693706430] [2021-06-05 15:14:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:33,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:33,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693706430] [2021-06-05 15:14:33,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693706430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:33,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615445595] [2021-06-05 15:14:33,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:33,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:33,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:33,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:14:33,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:33,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:33,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:14:33,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:33,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:33,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:33,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:14:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:33,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615445595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:33,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:33,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:14:33,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443810685] [2021-06-05 15:14:33,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:33,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:33,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:33,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:33,506 INFO L87 Difference]: Start difference. First operand 10021 states and 45038 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:35,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:35,862 INFO L93 Difference]: Finished difference Result 11514 states and 50855 transitions. [2021-06-05 15:14:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:14:35,862 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:35,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:35,888 INFO L225 Difference]: With dead ends: 11514 [2021-06-05 15:14:35,888 INFO L226 Difference]: Without dead ends: 11218 [2021-06-05 15:14:35,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1853.1ms TimeCoverageRelationStatistics Valid=555, Invalid=2985, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:14:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11218 states. [2021-06-05 15:14:36,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11218 to 10019. [2021-06-05 15:14:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10019 states, 10018 states have (on average 4.49490916350569) internal successors, (45030), 10018 states have internal predecessors, (45030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:36,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10019 states to 10019 states and 45030 transitions. [2021-06-05 15:14:36,089 INFO L78 Accepts]: Start accepts. Automaton has 10019 states and 45030 transitions. Word has length 30 [2021-06-05 15:14:36,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:36,089 INFO L482 AbstractCegarLoop]: Abstraction has 10019 states and 45030 transitions. [2021-06-05 15:14:36,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:36,090 INFO L276 IsEmpty]: Start isEmpty. Operand 10019 states and 45030 transitions. [2021-06-05 15:14:36,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:36,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:36,107 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:36,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:36,307 INFO L430 AbstractCegarLoop]: === Iteration 356 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:36,308 INFO L82 PathProgramCache]: Analyzing trace with hash 87255124, now seen corresponding path program 93 times [2021-06-05 15:14:36,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:36,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449167087] [2021-06-05 15:14:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:36,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:36,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449167087] [2021-06-05 15:14:36,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449167087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:36,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598516854] [2021-06-05 15:14:36,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:36,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:14:36,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:36,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:14:36,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:36,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:36,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:14:36,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:36,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:36,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:36,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:14:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:36,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598516854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:36,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:36,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:14:36,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772241328] [2021-06-05 15:14:36,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:36,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:36,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:36,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:36,777 INFO L87 Difference]: Start difference. First operand 10019 states and 45030 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:39,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:39,197 INFO L93 Difference]: Finished difference Result 11424 states and 50460 transitions. [2021-06-05 15:14:39,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:14:39,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:39,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:39,224 INFO L225 Difference]: With dead ends: 11424 [2021-06-05 15:14:39,224 INFO L226 Difference]: Without dead ends: 11176 [2021-06-05 15:14:39,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1809.7ms TimeCoverageRelationStatistics Valid=512, Invalid=3148, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:14:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11176 states. [2021-06-05 15:14:39,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11176 to 10022. [2021-06-05 15:14:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10022 states, 10021 states have (on average 4.49496058277617) internal successors, (45044), 10021 states have internal predecessors, (45044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 45044 transitions. [2021-06-05 15:14:39,439 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 45044 transitions. Word has length 30 [2021-06-05 15:14:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:39,440 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 45044 transitions. [2021-06-05 15:14:39,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 45044 transitions. [2021-06-05 15:14:39,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:39,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:39,457 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:39,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable848 [2021-06-05 15:14:39,658 INFO L430 AbstractCegarLoop]: === Iteration 357 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:39,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:39,658 INFO L82 PathProgramCache]: Analyzing trace with hash 751657866, now seen corresponding path program 94 times [2021-06-05 15:14:39,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:39,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936153179] [2021-06-05 15:14:39,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:39,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:39,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936153179] [2021-06-05 15:14:39,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936153179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:39,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600368436] [2021-06-05 15:14:39,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:39,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:39,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:39,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:39,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:39,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:14:39,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:39,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:39,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:39,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:14:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:40,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600368436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:40,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:40,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:14:40,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296919256] [2021-06-05 15:14:40,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:14:40,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:40,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:14:40,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:14:40,014 INFO L87 Difference]: Start difference. First operand 10022 states and 45044 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:41,776 INFO L93 Difference]: Finished difference Result 11362 states and 50380 transitions. [2021-06-05 15:14:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:14:41,776 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:41,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:41,802 INFO L225 Difference]: With dead ends: 11362 [2021-06-05 15:14:41,802 INFO L226 Difference]: Without dead ends: 11251 [2021-06-05 15:14:41,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1407.3ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:14:41,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11251 states. [2021-06-05 15:14:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11251 to 10041. [2021-06-05 15:14:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10041 states, 10040 states have (on average 4.493824701195219) internal successors, (45118), 10040 states have internal predecessors, (45118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10041 states to 10041 states and 45118 transitions. [2021-06-05 15:14:42,001 INFO L78 Accepts]: Start accepts. Automaton has 10041 states and 45118 transitions. Word has length 30 [2021-06-05 15:14:42,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:42,001 INFO L482 AbstractCegarLoop]: Abstraction has 10041 states and 45118 transitions. [2021-06-05 15:14:42,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:42,001 INFO L276 IsEmpty]: Start isEmpty. Operand 10041 states and 45118 transitions. [2021-06-05 15:14:42,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:42,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:42,018 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:42,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-06-05 15:14:42,218 INFO L430 AbstractCegarLoop]: === Iteration 358 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:42,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:42,219 INFO L82 PathProgramCache]: Analyzing trace with hash -631545590, now seen corresponding path program 95 times [2021-06-05 15:14:42,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:42,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767503984] [2021-06-05 15:14:42,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:42,384 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-06-05 15:14:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:42,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:42,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767503984] [2021-06-05 15:14:42,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767503984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:42,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68784926] [2021-06-05 15:14:42,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:42,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:14:42,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:42,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:42,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:42,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:14:42,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:42,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:42,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:42,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:14:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:42,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68784926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:42,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:42,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:14:42,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611634412] [2021-06-05 15:14:42,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:42,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:42,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:42,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:42,675 INFO L87 Difference]: Start difference. First operand 10041 states and 45118 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:44,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:44,987 INFO L93 Difference]: Finished difference Result 11575 states and 51275 transitions. [2021-06-05 15:14:44,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:14:44,987 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:44,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:45,013 INFO L225 Difference]: With dead ends: 11575 [2021-06-05 15:14:45,014 INFO L226 Difference]: Without dead ends: 11442 [2021-06-05 15:14:45,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1798.0ms TimeCoverageRelationStatistics Valid=520, Invalid=2450, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:14:45,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11442 states. [2021-06-05 15:14:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11442 to 10046. [2021-06-05 15:14:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10046 states, 10045 states have (on average 4.493479342956695) internal successors, (45137), 10045 states have internal predecessors, (45137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10046 states to 10046 states and 45137 transitions. [2021-06-05 15:14:45,220 INFO L78 Accepts]: Start accepts. Automaton has 10046 states and 45137 transitions. Word has length 30 [2021-06-05 15:14:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:45,220 INFO L482 AbstractCegarLoop]: Abstraction has 10046 states and 45137 transitions. [2021-06-05 15:14:45,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:45,220 INFO L276 IsEmpty]: Start isEmpty. Operand 10046 states and 45137 transitions. [2021-06-05 15:14:45,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:45,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:45,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:45,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable852,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:45,438 INFO L430 AbstractCegarLoop]: === Iteration 359 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:45,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:45,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1904131044, now seen corresponding path program 96 times [2021-06-05 15:14:45,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:45,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282911617] [2021-06-05 15:14:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:45,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:45,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282911617] [2021-06-05 15:14:45,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282911617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:45,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227865889] [2021-06-05 15:14:45,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:45,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:14:45,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:45,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:14:45,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:45,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:45,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:45,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:45,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:14:45,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:45,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:45,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:45,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-05 15:14:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:45,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227865889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:45,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:45,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:14:45,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27030527] [2021-06-05 15:14:45,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:14:45,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:45,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:14:45,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:14:45,930 INFO L87 Difference]: Start difference. First operand 10046 states and 45137 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:46,558 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-06-05 15:14:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:48,403 INFO L93 Difference]: Finished difference Result 11643 states and 51360 transitions. [2021-06-05 15:14:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:14:48,404 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:48,431 INFO L225 Difference]: With dead ends: 11643 [2021-06-05 15:14:48,431 INFO L226 Difference]: Without dead ends: 11435 [2021-06-05 15:14:48,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1829.2ms TimeCoverageRelationStatistics Valid=597, Invalid=2595, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:14:48,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11435 states. [2021-06-05 15:14:48,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11435 to 10045. [2021-06-05 15:14:48,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10045 states, 10044 states have (on average 4.493628036638789) internal successors, (45134), 10044 states have internal predecessors, (45134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 45134 transitions. [2021-06-05 15:14:48,646 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 45134 transitions. Word has length 30 [2021-06-05 15:14:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:48,646 INFO L482 AbstractCegarLoop]: Abstraction has 10045 states and 45134 transitions. [2021-06-05 15:14:48,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 45134 transitions. [2021-06-05 15:14:48,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:48,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:48,664 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:48,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable853 [2021-06-05 15:14:48,864 INFO L430 AbstractCegarLoop]: === Iteration 360 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:48,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:48,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2093250062, now seen corresponding path program 97 times [2021-06-05 15:14:48,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:48,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008729847] [2021-06-05 15:14:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:49,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:49,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008729847] [2021-06-05 15:14:49,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008729847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:49,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329357195] [2021-06-05 15:14:49,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:49,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:49,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:49,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:14:49,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:49,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:49,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:49,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:14:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:49,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329357195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:49,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:49,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:14:49,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613878579] [2021-06-05 15:14:49,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:49,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:49,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:49,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:49,272 INFO L87 Difference]: Start difference. First operand 10045 states and 45134 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:51,038 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-06-05 15:14:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:51,440 INFO L93 Difference]: Finished difference Result 11865 states and 52398 transitions. [2021-06-05 15:14:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:14:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:51,465 INFO L225 Difference]: With dead ends: 11865 [2021-06-05 15:14:51,466 INFO L226 Difference]: Without dead ends: 11732 [2021-06-05 15:14:51,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1447.9ms TimeCoverageRelationStatistics Valid=425, Invalid=2227, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:14:51,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11732 states. [2021-06-05 15:14:51,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11732 to 10093. [2021-06-05 15:14:51,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10093 states, 10092 states have (on average 4.492667459373761) internal successors, (45340), 10092 states have internal predecessors, (45340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:51,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10093 states to 10093 states and 45340 transitions. [2021-06-05 15:14:51,672 INFO L78 Accepts]: Start accepts. Automaton has 10093 states and 45340 transitions. Word has length 30 [2021-06-05 15:14:51,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:51,672 INFO L482 AbstractCegarLoop]: Abstraction has 10093 states and 45340 transitions. [2021-06-05 15:14:51,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 10093 states and 45340 transitions. [2021-06-05 15:14:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:51,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:51,690 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:51,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable858,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:51,890 INFO L430 AbstractCegarLoop]: === Iteration 361 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:51,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:51,890 INFO L82 PathProgramCache]: Analyzing trace with hash 636734046, now seen corresponding path program 37 times [2021-06-05 15:14:51,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:51,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464152067] [2021-06-05 15:14:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:52,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:52,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464152067] [2021-06-05 15:14:52,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464152067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:52,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386902704] [2021-06-05 15:14:52,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:52,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:52,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:52,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:14:52,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:52,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:52,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:52,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:14:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:52,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386902704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:52,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:52,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:14:52,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225766127] [2021-06-05 15:14:52,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:52,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:52,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:52,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:52,252 INFO L87 Difference]: Start difference. First operand 10093 states and 45340 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:54,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:54,084 INFO L93 Difference]: Finished difference Result 12325 states and 54104 transitions. [2021-06-05 15:14:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:14:54,085 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:54,112 INFO L225 Difference]: With dead ends: 12325 [2021-06-05 15:14:54,112 INFO L226 Difference]: Without dead ends: 12027 [2021-06-05 15:14:54,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1160.3ms TimeCoverageRelationStatistics Valid=528, Invalid=2664, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:14:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12027 states. [2021-06-05 15:14:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12027 to 10126. [2021-06-05 15:14:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10126 states, 10125 states have (on average 4.489481481481482) internal successors, (45456), 10125 states have internal predecessors, (45456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10126 states to 10126 states and 45456 transitions. [2021-06-05 15:14:54,321 INFO L78 Accepts]: Start accepts. Automaton has 10126 states and 45456 transitions. Word has length 30 [2021-06-05 15:14:54,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:54,321 INFO L482 AbstractCegarLoop]: Abstraction has 10126 states and 45456 transitions. [2021-06-05 15:14:54,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:54,321 INFO L276 IsEmpty]: Start isEmpty. Operand 10126 states and 45456 transitions. [2021-06-05 15:14:54,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:54,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:54,339 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:54,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable859,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:54,539 INFO L430 AbstractCegarLoop]: === Iteration 362 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:54,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:54,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1634437686, now seen corresponding path program 98 times [2021-06-05 15:14:54,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:54,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220725560] [2021-06-05 15:14:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:54,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:54,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220725560] [2021-06-05 15:14:54,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220725560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:54,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843128582] [2021-06-05 15:14:54,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:54,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:54,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:54,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:14:54,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:54,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:54,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:14:54,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:54,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:54,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:54,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-05 15:14:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:55,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843128582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:55,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:55,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:14:55,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392405302] [2021-06-05 15:14:55,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:55,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:55,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:55,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:55,081 INFO L87 Difference]: Start difference. First operand 10126 states and 45456 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:57,120 INFO L93 Difference]: Finished difference Result 11743 states and 51740 transitions. [2021-06-05 15:14:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:14:57,120 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:14:57,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:57,146 INFO L225 Difference]: With dead ends: 11743 [2021-06-05 15:14:57,146 INFO L226 Difference]: Without dead ends: 11461 [2021-06-05 15:14:57,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1500.0ms TimeCoverageRelationStatistics Valid=473, Invalid=2607, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:14:57,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11461 states. [2021-06-05 15:14:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11461 to 10146. [2021-06-05 15:14:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10146 states, 10145 states have (on average 4.488122227698374) internal successors, (45532), 10145 states have internal predecessors, (45532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10146 states to 10146 states and 45532 transitions. [2021-06-05 15:14:57,365 INFO L78 Accepts]: Start accepts. Automaton has 10146 states and 45532 transitions. Word has length 30 [2021-06-05 15:14:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:57,365 INFO L482 AbstractCegarLoop]: Abstraction has 10146 states and 45532 transitions. [2021-06-05 15:14:57,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:57,365 INFO L276 IsEmpty]: Start isEmpty. Operand 10146 states and 45532 transitions. [2021-06-05 15:14:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:14:57,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:57,384 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:57,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-06-05 15:14:57,585 INFO L430 AbstractCegarLoop]: === Iteration 363 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:57,585 INFO L82 PathProgramCache]: Analyzing trace with hash -124852976, now seen corresponding path program 99 times [2021-06-05 15:14:57,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:57,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725254166] [2021-06-05 15:14:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:57,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:57,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725254166] [2021-06-05 15:14:57,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725254166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:57,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053752434] [2021-06-05 15:14:57,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:57,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:14:57,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:57,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:14:57,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:57,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:57,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:14:57,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:57,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:57,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:57,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-05 15:14:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:58,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053752434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:58,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:58,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:14:58,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056704925] [2021-06-05 15:14:58,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:58,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:58,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:58,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:58,031 INFO L87 Difference]: Start difference. First operand 10146 states and 45532 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:00,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:00,787 INFO L93 Difference]: Finished difference Result 11849 states and 52116 transitions. [2021-06-05 15:15:00,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:15:00,787 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:15:00,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:00,815 INFO L225 Difference]: With dead ends: 11849 [2021-06-05 15:15:00,815 INFO L226 Difference]: Without dead ends: 11555 [2021-06-05 15:15:00,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 2023.2ms TimeCoverageRelationStatistics Valid=633, Invalid=3527, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:15:00,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11555 states. [2021-06-05 15:15:00,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11555 to 10148. [2021-06-05 15:15:00,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10148 states, 10147 states have (on average 4.487533261062383) internal successors, (45535), 10147 states have internal predecessors, (45535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:01,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10148 states to 10148 states and 45535 transitions. [2021-06-05 15:15:01,024 INFO L78 Accepts]: Start accepts. Automaton has 10148 states and 45535 transitions. Word has length 30 [2021-06-05 15:15:01,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:01,024 INFO L482 AbstractCegarLoop]: Abstraction has 10148 states and 45535 transitions. [2021-06-05 15:15:01,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:01,024 INFO L276 IsEmpty]: Start isEmpty. Operand 10148 states and 45535 transitions. [2021-06-05 15:15:01,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:15:01,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:01,042 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:01,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:01,244 INFO L430 AbstractCegarLoop]: === Iteration 364 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:01,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:01,245 INFO L82 PathProgramCache]: Analyzing trace with hash 20051996, now seen corresponding path program 88 times [2021-06-05 15:15:01,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:01,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611230565] [2021-06-05 15:15:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:01,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:01,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611230565] [2021-06-05 15:15:01,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611230565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:01,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824554779] [2021-06-05 15:15:01,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:01,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:01,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:01,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:01,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:15:01,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:01,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:01,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:01,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:15:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:01,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824554779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:01,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:01,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:15:01,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053991731] [2021-06-05 15:15:01,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:15:01,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:01,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:15:01,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:15:01,595 INFO L87 Difference]: Start difference. First operand 10148 states and 45535 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:03,978 INFO L93 Difference]: Finished difference Result 11318 states and 50249 transitions. [2021-06-05 15:15:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:15:03,979 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:15:03,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:04,007 INFO L225 Difference]: With dead ends: 11318 [2021-06-05 15:15:04,007 INFO L226 Difference]: Without dead ends: 11220 [2021-06-05 15:15:04,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1794.9ms TimeCoverageRelationStatistics Valid=497, Invalid=2583, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:15:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11220 states. [2021-06-05 15:15:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11220 to 10174. [2021-06-05 15:15:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10174 states, 10173 states have (on average 4.486877027425538) internal successors, (45645), 10173 states have internal predecessors, (45645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10174 states to 10174 states and 45645 transitions. [2021-06-05 15:15:04,343 INFO L78 Accepts]: Start accepts. Automaton has 10174 states and 45645 transitions. Word has length 30 [2021-06-05 15:15:04,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:04,343 INFO L482 AbstractCegarLoop]: Abstraction has 10174 states and 45645 transitions. [2021-06-05 15:15:04,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 10174 states and 45645 transitions. [2021-06-05 15:15:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:15:04,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:04,363 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:04,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable866 [2021-06-05 15:15:04,565 INFO L430 AbstractCegarLoop]: === Iteration 365 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:04,565 INFO L82 PathProgramCache]: Analyzing trace with hash -436233022, now seen corresponding path program 89 times [2021-06-05 15:15:04,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:04,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491452112] [2021-06-05 15:15:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:04,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:04,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491452112] [2021-06-05 15:15:04,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491452112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:04,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009447506] [2021-06-05 15:15:04,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:04,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:04,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:04,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:04,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:04,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:15:04,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:04,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:04,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:04,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:15:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:04,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009447506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:04,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:04,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:15:04,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941216660] [2021-06-05 15:15:04,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:04,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:04,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:04,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:04,898 INFO L87 Difference]: Start difference. First operand 10174 states and 45645 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 15:15:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:15:05,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:05,628 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 15:15:05,630 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:15:05,632 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 15:15:05,633 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:15:05 BasicIcfg [2021-06-05 15:15:05,633 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:15:05,633 INFO L168 Benchmark]: Toolchain (without parser) took 772765.81 ms. Allocated memory was 364.9 MB in the beginning and 2.3 GB in the end (delta: 1.9 GB). Free memory was 344.5 MB in the beginning and 1.8 GB in the end (delta: -1.5 GB). Peak memory consumption was 434.2 MB. Max. memory is 16.0 GB. [2021-06-05 15:15:05,633 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 364.9 MB. Free memory was 345.7 MB in the beginning and 345.6 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:15:05,633 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.67 ms. Allocated memory is still 364.9 MB. Free memory was 344.3 MB in the beginning and 342.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:15:05,634 INFO L168 Benchmark]: Boogie Preprocessor took 15.69 ms. Allocated memory is still 364.9 MB. Free memory was 342.9 MB in the beginning and 341.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:15:05,634 INFO L168 Benchmark]: RCFGBuilder took 327.15 ms. Allocated memory is still 364.9 MB. Free memory was 341.7 MB in the beginning and 323.7 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2021-06-05 15:15:05,634 INFO L168 Benchmark]: TraceAbstraction took 772375.97 ms. Allocated memory was 364.9 MB in the beginning and 2.3 GB in the end (delta: 1.9 GB). Free memory was 349.3 MB in the beginning and 1.8 GB in the end (delta: -1.5 GB). Peak memory consumption was 437.9 MB. Max. memory is 16.0 GB. [2021-06-05 15:15:05,634 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 364.9 MB. Free memory was 345.7 MB in the beginning and 345.6 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.67 ms. Allocated memory is still 364.9 MB. Free memory was 344.3 MB in the beginning and 342.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.69 ms. Allocated memory is still 364.9 MB. Free memory was 342.9 MB in the beginning and 341.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 327.15 ms. Allocated memory is still 364.9 MB. Free memory was 341.7 MB in the beginning and 323.7 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 772375.97 ms. Allocated memory was 364.9 MB in the beginning and 2.3 GB in the end (delta: 1.9 GB). Free memory was 349.3 MB in the beginning and 1.8 GB in the end (delta: -1.5 GB). Peak memory consumption was 437.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10174states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (171 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10174states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (171 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10174states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (171 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10174states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (171 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10174states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (171 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10174states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (171 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10174states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (171 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10174states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (171 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10174states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (171 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (10174states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (171 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (10174states) and FLOYD_HOARE automaton (currently 17 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (171 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 772193.6ms, OverallIterations: 365, TraceHistogramMax: 2, EmptinessCheckTime: 3218.9ms, AutomataDifference: 510594.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 45.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 40316 SDtfs, 104812 SDslu, 374446 SDs, 0 SdLazy, 424081 SolverSat, 41392 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 181921.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21991 GetRequests, 7569 SyntacticMatches, 545 SemanticMatches, 13877 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187100 ImplicationChecksByTransitivity, 356744.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10174occurred in iteration=364, InterpolantAutomatonStates: 12476, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 37792.4ms AutomataMinimizationTime, 364 MinimizatonAttempts, 470360 StatesRemovedByMinimization, 361 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2254.9ms SsaConstructionTime, 5082.4ms SatisfiabilityAnalysisTime, 132078.7ms InterpolantComputationTime, 20708 NumberOfCodeBlocks, 20708 NumberOfCodeBlocksAsserted, 1121 NumberOfCheckSat, 19988 ConstructedInterpolants, 731 QuantifiedInterpolants, 259815 SizeOfPredicates, 2764 NumberOfNonLiveVariables, 44701 ConjunctsInSsa, 9822 ConjunctsInUnsatCore, 720 InterpolantComputations, 10 PerfectInterpolantSequences, 171/3278 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown