/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-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:02:44,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:02:44,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:02:44,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:02:44,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 15:02:44,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 15:02:44,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 15:02:44,893 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 15:02:44,918 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:02:44,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:02:44,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:02:44,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:02:44,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:02:44,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:02:44,920 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:02:44,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:02:44,920 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:02:44,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:02:44,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:02:44,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:02:44,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:02:44,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:02:44,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:02:44,921 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:02:44,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:02:44,921 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:02:44,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:02:44,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:02:44,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:02:44,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:02:44,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:02:44,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:02:44,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:02:44,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:02:44,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:02:44,922 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:02:44,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:02:44,922 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:02:44,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:02:44,923 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:02:44,923 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:02:45,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:02:45,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:02:45,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:02:45,228 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:02:45,230 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:02:45,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl [2021-06-05 15:02:45,231 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl' [2021-06-05 15:02:45,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:02:45,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:02:45,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:02:45,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:02:45,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:02:45,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:45" (1/1) ... [2021-06-05 15:02:45,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:45" (1/1) ... [2021-06-05 15:02:45,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:02:45,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:02:45,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:02:45,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:02:45,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:45" (1/1) ... [2021-06-05 15:02:45,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:45" (1/1) ... [2021-06-05 15:02:45,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:45" (1/1) ... [2021-06-05 15:02:45,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:45" (1/1) ... [2021-06-05 15:02:45,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:45" (1/1) ... [2021-06-05 15:02:45,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:45" (1/1) ... [2021-06-05 15:02:45,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:45" (1/1) ... [2021-06-05 15:02:45,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:02:45,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:02:45,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:02:45,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:02:45,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:45" (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 15:02:45,398 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:02:45,399 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:02:45,399 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:02:45,399 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:02:45,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:02:45,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:02:45,400 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:02:45,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:02:45,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:02:45,400 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:02:45,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:02:45,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:02:45,402 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 15:02:45,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 15:02:45,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 15:02:45,402 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-05 15:02:45,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-05 15:02:45,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-05 15:02:45,403 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-06-05 15:02:45,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-06-05 15:02:45,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-06-05 15:02:45,404 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 15:02:45,626 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:02:45,626 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-05 15:02:45,627 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 15:02:45,627 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 15:02:45,627 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-06-05 15:02:45,628 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-06-05 15:02:45,629 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:02:45 BoogieIcfgContainer [2021-06-05 15:02:45,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:02:45,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:02:45,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:02:45,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:02:45,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:45" (1/2) ... [2021-06-05 15:02:45,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a09e6b and model type parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:02:45, skipping insertion in model container [2021-06-05 15:02:45,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:02:45" (2/2) ... [2021-06-05 15:02:45,634 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-2.wvr.bpl [2021-06-05 15:02:45,639 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:02:45,639 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:02:45,639 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:02:45,640 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:02:45,840 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-06-05 15:02:45,864 INFO L255 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-06-05 15:02:45,880 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:02:45,880 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:02:45,880 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:02:45,880 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:02:45,880 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:02:45,881 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:02:45,881 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:02:45,881 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:02:45,889 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-06-05 15:02:45,935 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:02:45,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:45,966 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] [2021-06-05 15:02:45,966 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:45,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:45,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1598114992, now seen corresponding path program 1 times [2021-06-05 15:02:45,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:45,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287124273] [2021-06-05 15:02:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:46,173 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 15:02:46,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:46,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287124273] [2021-06-05 15:02:46,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287124273] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:46,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:02:46,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:02:46,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711415742] [2021-06-05 15:02:46,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:02:46,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:46,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:02:46,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:02:46,193 INFO L87 Difference]: Start difference. First operand has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:46,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:46,307 INFO L93 Difference]: Finished difference Result 893 states and 3368 transitions. [2021-06-05 15:02:46,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:02:46,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:02:46,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:46,327 INFO L225 Difference]: With dead ends: 893 [2021-06-05 15:02:46,327 INFO L226 Difference]: Without dead ends: 874 [2021-06-05 15:02:46,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:02:46,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-06-05 15:02:46,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 598. [2021-06-05 15:02:46,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.809045226130653) internal successors, (2274), 597 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 2274 transitions. [2021-06-05 15:02:46,426 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 2274 transitions. Word has length 25 [2021-06-05 15:02:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:46,427 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 2274 transitions. [2021-06-05 15:02:46,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:46,427 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 2274 transitions. [2021-06-05 15:02:46,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:02:46,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:46,437 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] [2021-06-05 15:02:46,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:02:46,437 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:46,438 INFO L82 PathProgramCache]: Analyzing trace with hash -841782840, now seen corresponding path program 2 times [2021-06-05 15:02:46,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:46,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596952401] [2021-06-05 15:02:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:46,570 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 15:02:46,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:46,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596952401] [2021-06-05 15:02:46,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596952401] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:46,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:02:46,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:02:46,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810129425] [2021-06-05 15:02:46,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:02:46,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:46,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:02:46,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:02:46,574 INFO L87 Difference]: Start difference. First operand 598 states and 2274 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:46,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:46,670 INFO L93 Difference]: Finished difference Result 872 states and 3319 transitions. [2021-06-05 15:02:46,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:02:46,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:02:46,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:46,677 INFO L225 Difference]: With dead ends: 872 [2021-06-05 15:02:46,677 INFO L226 Difference]: Without dead ends: 841 [2021-06-05 15:02:46,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:02:46,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-05 15:02:46,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 596. [2021-06-05 15:02:46,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.7663865546218487) internal successors, (2241), 595 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:46,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 2241 transitions. [2021-06-05 15:02:46,722 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 2241 transitions. Word has length 25 [2021-06-05 15:02:46,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:46,723 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 2241 transitions. [2021-06-05 15:02:46,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:46,724 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 2241 transitions. [2021-06-05 15:02:46,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:02:46,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:46,727 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, 1] [2021-06-05 15:02:46,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:02:46,727 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:46,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:46,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1312476017, now seen corresponding path program 1 times [2021-06-05 15:02:46,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:46,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32873521] [2021-06-05 15:02:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:46,878 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 15:02:46,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:46,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32873521] [2021-06-05 15:02:46,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32873521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:46,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78060639] [2021-06-05 15:02:46,884 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 15:02:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:46,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:02:46,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:47,111 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 15:02:47,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78060639] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:47,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 15:02:47,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-06-05 15:02:47,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427245691] [2021-06-05 15:02:47,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:02:47,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:47,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:02:47,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:02:47,114 INFO L87 Difference]: Start difference. First operand 596 states and 2241 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:47,161 INFO L93 Difference]: Finished difference Result 867 states and 3197 transitions. [2021-06-05 15:02:47,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:02:47,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 15:02:47,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:47,168 INFO L225 Difference]: With dead ends: 867 [2021-06-05 15:02:47,168 INFO L226 Difference]: Without dead ends: 836 [2021-06-05 15:02:47,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:02:47,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-06-05 15:02:47,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 734. [2021-06-05 15:02:47,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.8663028649386084) internal successors, (2834), 733 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2834 transitions. [2021-06-05 15:02:47,200 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2834 transitions. Word has length 27 [2021-06-05 15:02:47,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:47,200 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2834 transitions. [2021-06-05 15:02:47,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,201 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2834 transitions. [2021-06-05 15:02:47,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:02:47,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:47,203 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] [2021-06-05 15:02:47,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 15:02:47,428 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:47,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:47,429 INFO L82 PathProgramCache]: Analyzing trace with hash 731220239, now seen corresponding path program 2 times [2021-06-05 15:02:47,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:47,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867214097] [2021-06-05 15:02:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:47,493 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 15:02:47,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:47,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867214097] [2021-06-05 15:02:47,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867214097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:47,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756370232] [2021-06-05 15:02:47,494 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 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 15:02:47,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:47,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:47,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:02:47,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:47,683 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 15:02:47,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756370232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:47,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:47,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-05 15:02:47,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74853013] [2021-06-05 15:02:47,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:02:47,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:47,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:02:47,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:02:47,685 INFO L87 Difference]: Start difference. First operand 734 states and 2834 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:47,836 INFO L93 Difference]: Finished difference Result 1660 states and 6252 transitions. [2021-06-05 15:02:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:02:47,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 15:02:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:47,846 INFO L225 Difference]: With dead ends: 1660 [2021-06-05 15:02:47,846 INFO L226 Difference]: Without dead ends: 1532 [2021-06-05 15:02:47,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-06-05 15:02:47,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1029. [2021-06-05 15:02:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 4.135214007782102) internal successors, (4251), 1028 states have internal predecessors, (4251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 4251 transitions. [2021-06-05 15:02:47,890 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 4251 transitions. Word has length 27 [2021-06-05 15:02:47,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:47,890 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 4251 transitions. [2021-06-05 15:02:47,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 4251 transitions. [2021-06-05 15:02:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:02:47,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:47,894 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] [2021-06-05 15:02:48,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:48,117 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:48,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:48,118 INFO L82 PathProgramCache]: Analyzing trace with hash -700559147, now seen corresponding path program 3 times [2021-06-05 15:02:48,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:48,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944821522] [2021-06-05 15:02:48,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:48,177 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 15:02:48,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:48,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944821522] [2021-06-05 15:02:48,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944821522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:48,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060863601] [2021-06-05 15:02:48,178 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 15:02:48,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:02:48,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:48,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:02:48,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:48,349 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 15:02:48,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060863601] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:48,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 15:02:48,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-06-05 15:02:48,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144943797] [2021-06-05 15:02:48,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:02:48,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:48,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:02:48,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:02:48,367 INFO L87 Difference]: Start difference. First operand 1029 states and 4251 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:48,412 INFO L93 Difference]: Finished difference Result 1331 states and 5140 transitions. [2021-06-05 15:02:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:02:48,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 15:02:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:48,421 INFO L225 Difference]: With dead ends: 1331 [2021-06-05 15:02:48,422 INFO L226 Difference]: Without dead ends: 1250 [2021-06-05 15:02:48,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:02:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-06-05 15:02:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 954. [2021-06-05 15:02:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 4.074501573976915) internal successors, (3883), 953 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:48,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3883 transitions. [2021-06-05 15:02:48,459 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3883 transitions. Word has length 27 [2021-06-05 15:02:48,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:48,460 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3883 transitions. [2021-06-05 15:02:48,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3883 transitions. [2021-06-05 15:02:48,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:02:48,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:48,464 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, 1] [2021-06-05 15:02:48,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:48,688 INFO L430 AbstractCegarLoop]: === Iteration 6 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:48,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:48,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1769205167, now seen corresponding path program 1 times [2021-06-05 15:02:48,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:48,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397383824] [2021-06-05 15:02:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:48,719 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 15:02:48,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:48,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397383824] [2021-06-05 15:02:48,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397383824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:48,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348803494] [2021-06-05 15:02:48,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:02:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:48,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:02:48,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:48,844 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 15:02:48,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348803494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:48,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:48,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-06-05 15:02:48,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497064266] [2021-06-05 15:02:48,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:02:48,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:48,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:02:48,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:02:48,846 INFO L87 Difference]: Start difference. First operand 954 states and 3883 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:48,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:48,918 INFO L93 Difference]: Finished difference Result 1888 states and 7508 transitions. [2021-06-05 15:02:48,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:02:48,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 15:02:48,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:48,932 INFO L225 Difference]: With dead ends: 1888 [2021-06-05 15:02:48,932 INFO L226 Difference]: Without dead ends: 1828 [2021-06-05 15:02:48,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:02:48,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-06-05 15:02:48,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1443. [2021-06-05 15:02:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1442 states have (on average 4.125520110957004) internal successors, (5949), 1442 states have internal predecessors, (5949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 5949 transitions. [2021-06-05 15:02:48,987 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 5949 transitions. Word has length 27 [2021-06-05 15:02:48,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:48,988 INFO L482 AbstractCegarLoop]: Abstraction has 1443 states and 5949 transitions. [2021-06-05 15:02:48,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:48,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 5949 transitions. [2021-06-05 15:02:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:02:48,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:48,993 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] [2021-06-05 15:02:49,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:49,209 INFO L430 AbstractCegarLoop]: === Iteration 7 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:49,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:49,209 INFO L82 PathProgramCache]: Analyzing trace with hash 55195285, now seen corresponding path program 2 times [2021-06-05 15:02:49,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:49,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204551119] [2021-06-05 15:02:49,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:49,231 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 15:02:49,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:49,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204551119] [2021-06-05 15:02:49,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204551119] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:49,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:02:49,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:02:49,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614068340] [2021-06-05 15:02:49,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:02:49,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:49,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:02:49,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:02:49,233 INFO L87 Difference]: Start difference. First operand 1443 states and 5949 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:49,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:49,266 INFO L93 Difference]: Finished difference Result 1479 states and 6007 transitions. [2021-06-05 15:02:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:02:49,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 15:02:49,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:49,276 INFO L225 Difference]: With dead ends: 1479 [2021-06-05 15:02:49,276 INFO L226 Difference]: Without dead ends: 1437 [2021-06-05 15:02:49,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:02:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-06-05 15:02:49,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1422. [2021-06-05 15:02:49,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 4.130190007037298) internal successors, (5869), 1421 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 5869 transitions. [2021-06-05 15:02:49,321 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 5869 transitions. Word has length 27 [2021-06-05 15:02:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:49,321 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 5869 transitions. [2021-06-05 15:02:49,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 5869 transitions. [2021-06-05 15:02:49,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:02:49,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:49,326 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] [2021-06-05 15:02:49,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 15:02:49,326 INFO L430 AbstractCegarLoop]: === Iteration 8 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:49,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:49,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1098192368, now seen corresponding path program 1 times [2021-06-05 15:02:49,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:49,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977362280] [2021-06-05 15:02:49,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:49,470 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 15:02:49,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:49,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977362280] [2021-06-05 15:02:49,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977362280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:49,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119880865] [2021-06-05 15:02:49,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:02:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:49,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:02:49,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:49,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 15:02:49,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:49,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:49,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:49,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 15:02:49,854 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 15:02:49,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119880865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:49,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:49,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 15:02:49,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344264434] [2021-06-05 15:02:49,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:02:49,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:49,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:02:49,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:02:49,856 INFO L87 Difference]: Start difference. First operand 1422 states and 5869 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:50,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:50,638 INFO L93 Difference]: Finished difference Result 1985 states and 8093 transitions. [2021-06-05 15:02:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:02:50,639 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:02:50,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:50,652 INFO L225 Difference]: With dead ends: 1985 [2021-06-05 15:02:50,652 INFO L226 Difference]: Without dead ends: 1966 [2021-06-05 15:02:50,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 685.7ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:02:50,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-06-05 15:02:50,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1519. [2021-06-05 15:02:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 4.118577075098814) internal successors, (6252), 1518 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 6252 transitions. [2021-06-05 15:02:50,702 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 6252 transitions. Word has length 29 [2021-06-05 15:02:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:50,703 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 6252 transitions. [2021-06-05 15:02:50,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 6252 transitions. [2021-06-05 15:02:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:02:50,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:50,708 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] [2021-06-05 15:02:50,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:50,931 INFO L430 AbstractCegarLoop]: === Iteration 9 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:50,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:50,931 INFO L82 PathProgramCache]: Analyzing trace with hash 863481530, now seen corresponding path program 2 times [2021-06-05 15:02:50,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:50,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606093445] [2021-06-05 15:02:50,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:51,090 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 15:02:51,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:51,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606093445] [2021-06-05 15:02:51,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606093445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:51,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525018049] [2021-06-05 15:02:51,090 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 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 15:02:51,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:51,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:51,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:02:51,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:51,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:51,318 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 13 treesize of output 17 [2021-06-05 15:02:51,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:51,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:51,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:51,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 15:02:51,465 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 15:02:51,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525018049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:51,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:51,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:02:51,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205718053] [2021-06-05 15:02:51,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:02:51,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:51,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:02:51,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:02:51,467 INFO L87 Difference]: Start difference. First operand 1519 states and 6252 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:51,867 INFO L93 Difference]: Finished difference Result 1822 states and 7414 transitions. [2021-06-05 15:02:51,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:02:51,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:02:51,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:51,878 INFO L225 Difference]: With dead ends: 1822 [2021-06-05 15:02:51,879 INFO L226 Difference]: Without dead ends: 1803 [2021-06-05 15:02:51,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 440.2ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:02:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2021-06-05 15:02:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1522. [2021-06-05 15:02:51,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 4.117028270874425) internal successors, (6262), 1521 states have internal predecessors, (6262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 6262 transitions. [2021-06-05 15:02:51,923 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 6262 transitions. Word has length 29 [2021-06-05 15:02:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:51,924 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 6262 transitions. [2021-06-05 15:02:51,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 6262 transitions. [2021-06-05 15:02:51,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:02:51,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:51,928 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] [2021-06-05 15:02:52,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:52,151 INFO L430 AbstractCegarLoop]: === Iteration 10 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:52,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:52,151 INFO L82 PathProgramCache]: Analyzing trace with hash 299884106, now seen corresponding path program 3 times [2021-06-05 15:02:52,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:52,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314086201] [2021-06-05 15:02:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:52,292 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 15:02:52,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:52,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314086201] [2021-06-05 15:02:52,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314086201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:52,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238001649] [2021-06-05 15:02:52,292 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 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 15:02:52,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:02:52,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:52,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:02:52,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:52,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:52,484 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 13 treesize of output 17 [2021-06-05 15:02:52,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:52,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:52,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:52,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 15:02:52,643 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 15:02:52,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238001649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:52,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:52,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:02:52,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860630168] [2021-06-05 15:02:52,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:02:52,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:52,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:02:52,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:02:52,646 INFO L87 Difference]: Start difference. First operand 1522 states and 6262 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:53,069 INFO L93 Difference]: Finished difference Result 1919 states and 7749 transitions. [2021-06-05 15:02:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:02:53,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:02:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:53,077 INFO L225 Difference]: With dead ends: 1919 [2021-06-05 15:02:53,077 INFO L226 Difference]: Without dead ends: 1900 [2021-06-05 15:02:53,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 431.5ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:02:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2021-06-05 15:02:53,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1529. [2021-06-05 15:02:53,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 4.111910994764398) internal successors, (6283), 1528 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 6283 transitions. [2021-06-05 15:02:53,120 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 6283 transitions. Word has length 29 [2021-06-05 15:02:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:53,120 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 6283 transitions. [2021-06-05 15:02:53,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 6283 transitions. [2021-06-05 15:02:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:02:53,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:53,125 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] [2021-06-05 15:02:53,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:02:53,347 INFO L430 AbstractCegarLoop]: === Iteration 11 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:53,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:53,348 INFO L82 PathProgramCache]: Analyzing trace with hash -71340900, now seen corresponding path program 4 times [2021-06-05 15:02:53,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:53,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337887532] [2021-06-05 15:02:53,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:53,490 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 15:02:53,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:53,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337887532] [2021-06-05 15:02:53,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337887532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:53,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112860838] [2021-06-05 15:02:53,491 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 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 15:02:53,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:53,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:53,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:02:53,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:53,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 15:02:53,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:53,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:53,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:53,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:15 [2021-06-05 15:02:53,739 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 15:02:53,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112860838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:53,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:53,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 15:02:53,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790672670] [2021-06-05 15:02:53,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:02:53,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:53,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:02:53,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:02:53,741 INFO L87 Difference]: Start difference. First operand 1529 states and 6283 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:54,562 INFO L93 Difference]: Finished difference Result 2650 states and 10619 transitions. [2021-06-05 15:02:54,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:02:54,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:02:54,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:54,581 INFO L225 Difference]: With dead ends: 2650 [2021-06-05 15:02:54,581 INFO L226 Difference]: Without dead ends: 2626 [2021-06-05 15:02:54,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 586.6ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:02:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-05 15:02:54,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1650. [2021-06-05 15:02:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 4.138872043662826) internal successors, (6825), 1649 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 6825 transitions. [2021-06-05 15:02:54,645 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 6825 transitions. Word has length 29 [2021-06-05 15:02:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:54,646 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 6825 transitions. [2021-06-05 15:02:54,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 6825 transitions. [2021-06-05 15:02:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:02:54,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:54,651 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, 1, 1, 1] [2021-06-05 15:02:54,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 15:02:54,876 INFO L430 AbstractCegarLoop]: === Iteration 12 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:54,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:54,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1739734342, now seen corresponding path program 5 times [2021-06-05 15:02:54,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:54,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737005004] [2021-06-05 15:02:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:54,991 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 15:02:54,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:54,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737005004] [2021-06-05 15:02:54,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737005004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:54,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64103689] [2021-06-05 15:02:54,992 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 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 15:02:55,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:55,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:55,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:02:55,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:55,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 15:02:55,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:55,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:55,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:55,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:15 [2021-06-05 15:02:55,234 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 15:02:55,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64103689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:55,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:55,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 15:02:55,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486289420] [2021-06-05 15:02:55,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:02:55,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:55,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:02:55,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:02:55,236 INFO L87 Difference]: Start difference. First operand 1650 states and 6825 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:56,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:56,004 INFO L93 Difference]: Finished difference Result 2697 states and 10750 transitions. [2021-06-05 15:02:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:02:56,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:02:56,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:56,013 INFO L225 Difference]: With dead ends: 2697 [2021-06-05 15:02:56,013 INFO L226 Difference]: Without dead ends: 2648 [2021-06-05 15:02:56,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 493.6ms TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:02:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-05 15:02:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1614. [2021-06-05 15:02:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 4.145071295722257) internal successors, (6686), 1613 states have internal predecessors, (6686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 6686 transitions. [2021-06-05 15:02:56,061 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 6686 transitions. Word has length 29 [2021-06-05 15:02:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:56,061 INFO L482 AbstractCegarLoop]: Abstraction has 1614 states and 6686 transitions. [2021-06-05 15:02:56,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 6686 transitions. [2021-06-05 15:02:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:02:56,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:56,066 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] [2021-06-05 15:02:56,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:56,281 INFO L430 AbstractCegarLoop]: === Iteration 13 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1333837744, now seen corresponding path program 6 times [2021-06-05 15:02:56,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:56,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009588827] [2021-06-05 15:02:56,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:56,412 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 15:02:56,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:56,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009588827] [2021-06-05 15:02:56,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009588827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:56,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354944799] [2021-06-05 15:02:56,412 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 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 15:02:56,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:02:56,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:56,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:02:56,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:56,581 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 15 treesize of output 9 [2021-06-05 15:02:56,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:56,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:56,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:56,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2021-06-05 15:02:56,713 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 15:02:56,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354944799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:56,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:56,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 15:02:56,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628933238] [2021-06-05 15:02:56,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:02:56,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:56,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:02:56,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:02:56,714 INFO L87 Difference]: Start difference. First operand 1614 states and 6686 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:57,532 INFO L93 Difference]: Finished difference Result 2293 states and 9357 transitions. [2021-06-05 15:02:57,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:02:57,533 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:02:57,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:57,540 INFO L225 Difference]: With dead ends: 2293 [2021-06-05 15:02:57,541 INFO L226 Difference]: Without dead ends: 2274 [2021-06-05 15:02:57,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 633.9ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:02:57,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-06-05 15:02:57,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 1602. [2021-06-05 15:02:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1601 states have (on average 4.147407870081199) internal successors, (6640), 1601 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 6640 transitions. [2021-06-05 15:02:57,583 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 6640 transitions. Word has length 29 [2021-06-05 15:02:57,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:57,583 INFO L482 AbstractCegarLoop]: Abstraction has 1602 states and 6640 transitions. [2021-06-05 15:02:57,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 6640 transitions. [2021-06-05 15:02:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:02:57,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:57,587 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] [2021-06-05 15:02:57,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:57,801 INFO L430 AbstractCegarLoop]: === Iteration 14 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:57,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:57,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2042972034, now seen corresponding path program 7 times [2021-06-05 15:02:57,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:57,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124620365] [2021-06-05 15:02:57,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:57,938 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 15:02:57,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:57,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124620365] [2021-06-05 15:02:57,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124620365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:57,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217331840] [2021-06-05 15:02:57,939 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 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 15:02:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:57,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:02:57,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:58,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:02:58,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:58,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:58,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:58,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:02:58,170 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 15:02:58,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217331840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:58,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:58,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 15:02:58,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583123696] [2021-06-05 15:02:58,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:02:58,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:02:58,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:02:58,172 INFO L87 Difference]: Start difference. First operand 1602 states and 6640 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:58,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:58,959 INFO L93 Difference]: Finished difference Result 2621 states and 10631 transitions. [2021-06-05 15:02:58,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:02:58,959 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:02:58,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:58,967 INFO L225 Difference]: With dead ends: 2621 [2021-06-05 15:02:58,967 INFO L226 Difference]: Without dead ends: 2583 [2021-06-05 15:02:58,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 646.3ms TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:02:58,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-06-05 15:02:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 1794. [2021-06-05 15:02:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 4.1751254880089235) internal successors, (7486), 1793 states have internal predecessors, (7486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:59,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 7486 transitions. [2021-06-05 15:02:59,014 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 7486 transitions. Word has length 29 [2021-06-05 15:02:59,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:59,014 INFO L482 AbstractCegarLoop]: Abstraction has 1794 states and 7486 transitions. [2021-06-05 15:02:59,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:59,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 7486 transitions. [2021-06-05 15:02:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:02:59,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:59,018 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] [2021-06-05 15:02:59,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 15:02:59,237 INFO L430 AbstractCegarLoop]: === Iteration 15 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:59,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:59,237 INFO L82 PathProgramCache]: Analyzing trace with hash -739699428, now seen corresponding path program 8 times [2021-06-05 15:02:59,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:59,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424733527] [2021-06-05 15:02:59,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:59,355 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 15:02:59,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:59,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424733527] [2021-06-05 15:02:59,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424733527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:59,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213851990] [2021-06-05 15:02:59,355 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 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 15:02:59,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:59,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:59,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:02:59,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:59,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:59,478 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 15:02:59,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:59,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:59,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:59,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:02:59,644 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 15:02:59,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213851990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:59,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:59,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:02:59,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238362515] [2021-06-05 15:02:59,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:02:59,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:59,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:02:59,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:02:59,646 INFO L87 Difference]: Start difference. First operand 1794 states and 7486 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:00,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:00,058 INFO L93 Difference]: Finished difference Result 2154 states and 8857 transitions. [2021-06-05 15:03:00,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:03:00,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:00,063 INFO L225 Difference]: With dead ends: 2154 [2021-06-05 15:03:00,063 INFO L226 Difference]: Without dead ends: 2141 [2021-06-05 15:03:00,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 386.6ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:03:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-06-05 15:03:00,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1787. [2021-06-05 15:03:00,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 4.1780515117581185) internal successors, (7462), 1786 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 7462 transitions. [2021-06-05 15:03:00,105 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 7462 transitions. Word has length 29 [2021-06-05 15:03:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:00,106 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 7462 transitions. [2021-06-05 15:03:00,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 7462 transitions. [2021-06-05 15:03:00,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:00,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:00,139 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] [2021-06-05 15:03:00,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:03:00,353 INFO L430 AbstractCegarLoop]: === Iteration 16 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:00,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1639061500, now seen corresponding path program 9 times [2021-06-05 15:03:00,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:00,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879867559] [2021-06-05 15:03:00,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:00,493 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 15:03:00,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:00,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879867559] [2021-06-05 15:03:00,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879867559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:00,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377710955] [2021-06-05 15:03:00,494 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 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 15:03:00,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:00,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:00,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:03:00,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:00,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:00,610 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 15:03:00,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:00,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:00,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:00,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 15:03:00,770 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 15:03:00,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377710955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:00,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:00,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:00,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119637962] [2021-06-05 15:03:00,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:00,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:00,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:00,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:00,772 INFO L87 Difference]: Start difference. First operand 1787 states and 7462 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:01,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:01,118 INFO L93 Difference]: Finished difference Result 2189 states and 8940 transitions. [2021-06-05 15:03:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:01,118 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:01,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:01,122 INFO L225 Difference]: With dead ends: 2189 [2021-06-05 15:03:01,122 INFO L226 Difference]: Without dead ends: 2174 [2021-06-05 15:03:01,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:03:01,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-06-05 15:03:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1794. [2021-06-05 15:03:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 4.173452314556609) internal successors, (7483), 1793 states have internal predecessors, (7483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:01,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 7483 transitions. [2021-06-05 15:03:01,164 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 7483 transitions. Word has length 29 [2021-06-05 15:03:01,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:01,164 INFO L482 AbstractCegarLoop]: Abstraction has 1794 states and 7483 transitions. [2021-06-05 15:03:01,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:01,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 7483 transitions. [2021-06-05 15:03:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:01,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:01,168 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] [2021-06-05 15:03:01,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 15:03:01,390 INFO L430 AbstractCegarLoop]: === Iteration 17 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:01,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:01,391 INFO L82 PathProgramCache]: Analyzing trace with hash 875307494, now seen corresponding path program 10 times [2021-06-05 15:03:01,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:01,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155209773] [2021-06-05 15:03:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:01,493 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 15:03:01,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:01,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155209773] [2021-06-05 15:03:01,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155209773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:01,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703739404] [2021-06-05 15:03:01,494 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 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 15:03:01,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:01,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:01,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:01,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:01,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:03:01,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:01,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:01,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:01,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:03:01,722 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 15:03:01,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703739404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:01,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:01,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 15:03:01,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748515354] [2021-06-05 15:03:01,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:03:01,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:01,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:03:01,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:01,724 INFO L87 Difference]: Start difference. First operand 1794 states and 7483 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:02,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:02,379 INFO L93 Difference]: Finished difference Result 2601 states and 10341 transitions. [2021-06-05 15:03:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:02,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:02,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:02,385 INFO L225 Difference]: With dead ends: 2601 [2021-06-05 15:03:02,385 INFO L226 Difference]: Without dead ends: 2561 [2021-06-05 15:03:02,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 500.3ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:03:02,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-06-05 15:03:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 1747. [2021-06-05 15:03:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 4.18213058419244) internal successors, (7302), 1746 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 7302 transitions. [2021-06-05 15:03:02,424 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 7302 transitions. Word has length 29 [2021-06-05 15:03:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:02,424 INFO L482 AbstractCegarLoop]: Abstraction has 1747 states and 7302 transitions. [2021-06-05 15:03:02,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 7302 transitions. [2021-06-05 15:03:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:02,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:02,429 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] [2021-06-05 15:03:02,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:02,649 INFO L430 AbstractCegarLoop]: === Iteration 18 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:02,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1269743148, now seen corresponding path program 11 times [2021-06-05 15:03:02,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:02,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813302834] [2021-06-05 15:03:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:02,776 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 15:03:02,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:02,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813302834] [2021-06-05 15:03:02,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813302834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:02,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885475546] [2021-06-05 15:03:02,776 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 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 15:03:02,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:03:02,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:02,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:02,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:02,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:03:02,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:02,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:02,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:02,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:03:03,020 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 15:03:03,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885475546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:03,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:03,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 15:03:03,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934264294] [2021-06-05 15:03:03,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:03:03,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:03,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:03:03,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:03,022 INFO L87 Difference]: Start difference. First operand 1747 states and 7302 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:03,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:03,651 INFO L93 Difference]: Finished difference Result 2160 states and 8941 transitions. [2021-06-05 15:03:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:03:03,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:03,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:03,655 INFO L225 Difference]: With dead ends: 2160 [2021-06-05 15:03:03,655 INFO L226 Difference]: Without dead ends: 2145 [2021-06-05 15:03:03,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 542.8ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:03:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-06-05 15:03:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1744. [2021-06-05 15:03:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 4.183591508892714) internal successors, (7292), 1743 states have internal predecessors, (7292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 7292 transitions. [2021-06-05 15:03:03,699 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 7292 transitions. Word has length 29 [2021-06-05 15:03:03,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:03,699 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 7292 transitions. [2021-06-05 15:03:03,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 7292 transitions. [2021-06-05 15:03:03,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:03,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:03,703 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] [2021-06-05 15:03:03,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 15:03:03,917 INFO L430 AbstractCegarLoop]: === Iteration 19 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:03,917 INFO L82 PathProgramCache]: Analyzing trace with hash 220970746, now seen corresponding path program 12 times [2021-06-05 15:03:03,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:03,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784352644] [2021-06-05 15:03:03,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:04,037 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 15:03:04,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:04,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784352644] [2021-06-05 15:03:04,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784352644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:04,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413396484] [2021-06-05 15:03:04,038 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 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 15:03:04,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:03:04,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:04,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:03:04,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:04,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:04,128 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 15:03:04,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:04,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:04,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:04,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 15:03:04,241 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 15:03:04,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413396484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:04,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:04,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 15:03:04,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864947222] [2021-06-05 15:03:04,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:03:04,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:04,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:03:04,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:04,243 INFO L87 Difference]: Start difference. First operand 1744 states and 7292 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 15:03:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:04,600 INFO L93 Difference]: Finished difference Result 2257 states and 9217 transitions. [2021-06-05 15:03:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:04,601 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 29 [2021-06-05 15:03:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:04,607 INFO L225 Difference]: With dead ends: 2257 [2021-06-05 15:03:04,607 INFO L226 Difference]: Without dead ends: 2238 [2021-06-05 15:03:04,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:03:04,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-06-05 15:03:04,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1814. [2021-06-05 15:03:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 4.200220628792057) internal successors, (7615), 1813 states have internal predecessors, (7615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 7615 transitions. [2021-06-05 15:03:04,652 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 7615 transitions. Word has length 29 [2021-06-05 15:03:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:04,652 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 7615 transitions. [2021-06-05 15:03:04,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 15:03:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 7615 transitions. [2021-06-05 15:03:04,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:04,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:04,656 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] [2021-06-05 15:03:04,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:04,880 INFO L430 AbstractCegarLoop]: === Iteration 20 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:04,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:04,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1524243352, now seen corresponding path program 13 times [2021-06-05 15:03:04,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:04,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264557287] [2021-06-05 15:03:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:04,989 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 15:03:04,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:04,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264557287] [2021-06-05 15:03:04,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264557287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:04,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694836492] [2021-06-05 15:03:04,989 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 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 15:03:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:05,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:05,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:05,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:03:05,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:05,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:05,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:05,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:03:05,201 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 15:03:05,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694836492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:05,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:05,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 15:03:05,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395677794] [2021-06-05 15:03:05,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:03:05,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:05,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:03:05,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:05,203 INFO L87 Difference]: Start difference. First operand 1814 states and 7615 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:05,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:05,740 INFO L93 Difference]: Finished difference Result 2776 states and 11185 transitions. [2021-06-05 15:03:05,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:05,741 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:05,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:05,746 INFO L225 Difference]: With dead ends: 2776 [2021-06-05 15:03:05,746 INFO L226 Difference]: Without dead ends: 2752 [2021-06-05 15:03:05,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 467.7ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:03:05,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-06-05 15:03:05,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1926. [2021-06-05 15:03:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 4.208311688311689) internal successors, (8101), 1925 states have internal predecessors, (8101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:05,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 8101 transitions. [2021-06-05 15:03:05,787 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 8101 transitions. Word has length 29 [2021-06-05 15:03:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:05,788 INFO L482 AbstractCegarLoop]: Abstraction has 1926 states and 8101 transitions. [2021-06-05 15:03:05,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:05,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 8101 transitions. [2021-06-05 15:03:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:05,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:05,792 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] [2021-06-05 15:03:05,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:05,993 INFO L430 AbstractCegarLoop]: === Iteration 21 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:05,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:05,993 INFO L82 PathProgramCache]: Analyzing trace with hash -144150090, now seen corresponding path program 14 times [2021-06-05 15:03:05,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:05,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038720695] [2021-06-05 15:03:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:06,116 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 15:03:06,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:06,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038720695] [2021-06-05 15:03:06,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038720695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:06,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290103300] [2021-06-05 15:03:06,117 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 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 15:03:06,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:06,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:06,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:06,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:06,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:06,221 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 15:03:06,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:06,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:06,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:06,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:06,371 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 15:03:06,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290103300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:06,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:06,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:06,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969052907] [2021-06-05 15:03:06,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:06,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:06,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:06,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:06,373 INFO L87 Difference]: Start difference. First operand 1926 states and 8101 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:06,758 INFO L93 Difference]: Finished difference Result 2334 states and 9589 transitions. [2021-06-05 15:03:06,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:03:06,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:06,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:06,771 INFO L225 Difference]: With dead ends: 2334 [2021-06-05 15:03:06,772 INFO L226 Difference]: Without dead ends: 2320 [2021-06-05 15:03:06,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:03:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-05 15:03:06,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1919. [2021-06-05 15:03:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 4.211157455683003) internal successors, (8077), 1918 states have internal predecessors, (8077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 8077 transitions. [2021-06-05 15:03:06,807 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 8077 transitions. Word has length 29 [2021-06-05 15:03:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:06,807 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 8077 transitions. [2021-06-05 15:03:06,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:06,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 8077 transitions. [2021-06-05 15:03:06,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:06,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:06,811 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] [2021-06-05 15:03:07,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 15:03:07,025 INFO L430 AbstractCegarLoop]: === Iteration 22 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1470856832, now seen corresponding path program 15 times [2021-06-05 15:03:07,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:07,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512398069] [2021-06-05 15:03:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:07,124 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 15:03:07,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:07,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512398069] [2021-06-05 15:03:07,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512398069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:07,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531150186] [2021-06-05 15:03:07,125 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 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 15:03:07,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:07,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:07,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:03:07,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:07,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:07,224 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 15:03:07,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:07,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:07,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:07,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 15:03:07,372 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 15:03:07,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531150186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:07,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:07,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:07,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294882495] [2021-06-05 15:03:07,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:07,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:07,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:07,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:07,373 INFO L87 Difference]: Start difference. First operand 1919 states and 8077 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:07,744 INFO L93 Difference]: Finished difference Result 2310 states and 9540 transitions. [2021-06-05 15:03:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:07,745 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:07,749 INFO L225 Difference]: With dead ends: 2310 [2021-06-05 15:03:07,749 INFO L226 Difference]: Without dead ends: 2287 [2021-06-05 15:03:07,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:03:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-06-05 15:03:07,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1872. [2021-06-05 15:03:07,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 4.220203099946553) internal successors, (7896), 1871 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:07,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 7896 transitions. [2021-06-05 15:03:07,783 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 7896 transitions. Word has length 29 [2021-06-05 15:03:07,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:07,784 INFO L482 AbstractCegarLoop]: Abstraction has 1872 states and 7896 transitions. [2021-06-05 15:03:07,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:07,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 7896 transitions. [2021-06-05 15:03:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:07,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:07,788 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] [2021-06-05 15:03:08,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:08,012 INFO L430 AbstractCegarLoop]: === Iteration 23 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:08,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:08,012 INFO L82 PathProgramCache]: Analyzing trace with hash 740203066, now seen corresponding path program 16 times [2021-06-05 15:03:08,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:08,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380543331] [2021-06-05 15:03:08,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:08,144 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 15:03:08,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:08,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380543331] [2021-06-05 15:03:08,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380543331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:08,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178392374] [2021-06-05 15:03:08,145 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 15:03:08,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:08,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:08,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:08,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:08,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:03:08,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:08,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:08,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:08,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:03:08,355 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 15:03:08,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178392374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:08,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:08,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 15:03:08,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709711517] [2021-06-05 15:03:08,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:03:08,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:08,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:03:08,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:08,357 INFO L87 Difference]: Start difference. First operand 1872 states and 7896 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:09,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:09,083 INFO L93 Difference]: Finished difference Result 2324 states and 9664 transitions. [2021-06-05 15:03:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:03:09,083 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:09,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:09,087 INFO L225 Difference]: With dead ends: 2324 [2021-06-05 15:03:09,088 INFO L226 Difference]: Without dead ends: 2305 [2021-06-05 15:03:09,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 611.6ms TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:03:09,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-06-05 15:03:09,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1872. [2021-06-05 15:03:09,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 4.220203099946553) internal successors, (7896), 1871 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 7896 transitions. [2021-06-05 15:03:09,114 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 7896 transitions. Word has length 29 [2021-06-05 15:03:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:09,114 INFO L482 AbstractCegarLoop]: Abstraction has 1872 states and 7896 transitions. [2021-06-05 15:03:09,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 7896 transitions. [2021-06-05 15:03:09,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:09,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:09,118 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] [2021-06-05 15:03:09,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 15:03:09,318 INFO L430 AbstractCegarLoop]: === Iteration 24 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:09,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:09,319 INFO L82 PathProgramCache]: Analyzing trace with hash 176605642, now seen corresponding path program 17 times [2021-06-05 15:03:09,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:09,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165478137] [2021-06-05 15:03:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:09,450 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 15:03:09,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:09,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165478137] [2021-06-05 15:03:09,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165478137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:09,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737667398] [2021-06-05 15:03:09,451 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 15:03:09,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:09,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:09,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:09,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:09,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:03:09,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:09,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:09,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:09,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:03:09,707 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 15:03:09,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737667398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:09,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:09,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 15:03:09,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137011312] [2021-06-05 15:03:09,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:03:09,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:09,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:03:09,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:09,709 INFO L87 Difference]: Start difference. First operand 1872 states and 7896 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:10,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:10,596 INFO L93 Difference]: Finished difference Result 2792 states and 11337 transitions. [2021-06-05 15:03:10,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:03:10,596 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:10,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:10,604 INFO L225 Difference]: With dead ends: 2792 [2021-06-05 15:03:10,604 INFO L226 Difference]: Without dead ends: 2750 [2021-06-05 15:03:10,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 690.2ms TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:03:10,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-06-05 15:03:10,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 1860. [2021-06-05 15:03:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 4.2210866057019905) internal successors, (7847), 1859 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 7847 transitions. [2021-06-05 15:03:10,649 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 7847 transitions. Word has length 29 [2021-06-05 15:03:10,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:10,649 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 7847 transitions. [2021-06-05 15:03:10,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:10,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 7847 transitions. [2021-06-05 15:03:10,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:10,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:10,654 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] [2021-06-05 15:03:10,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 15:03:10,877 INFO L430 AbstractCegarLoop]: === Iteration 25 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:10,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:10,877 INFO L82 PathProgramCache]: Analyzing trace with hash -81335312, now seen corresponding path program 18 times [2021-06-05 15:03:10,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:10,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144923282] [2021-06-05 15:03:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:10,996 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 15:03:10,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:10,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144923282] [2021-06-05 15:03:10,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144923282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:10,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465396804] [2021-06-05 15:03:10,997 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 15:03:11,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:03:11,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:11,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:11,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:11,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:11,115 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 13 treesize of output 17 [2021-06-05 15:03:11,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:11,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:11,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:11,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 15:03:11,247 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 15:03:11,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465396804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:11,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:11,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:11,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989406147] [2021-06-05 15:03:11,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:11,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:11,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:11,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:11,249 INFO L87 Difference]: Start difference. First operand 1860 states and 7847 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:11,948 INFO L93 Difference]: Finished difference Result 2571 states and 10667 transitions. [2021-06-05 15:03:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:03:11,948 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:11,954 INFO L225 Difference]: With dead ends: 2571 [2021-06-05 15:03:11,954 INFO L226 Difference]: Without dead ends: 2552 [2021-06-05 15:03:11,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 625.6ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:03:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-06-05 15:03:11,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 1990. [2021-06-05 15:03:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 4.24534942182001) internal successors, (8444), 1989 states have internal predecessors, (8444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 8444 transitions. [2021-06-05 15:03:11,986 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 8444 transitions. Word has length 29 [2021-06-05 15:03:11,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:11,987 INFO L482 AbstractCegarLoop]: Abstraction has 1990 states and 8444 transitions. [2021-06-05 15:03:11,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:11,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 8444 transitions. [2021-06-05 15:03:11,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:11,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:11,990 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] [2021-06-05 15:03:12,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:12,191 INFO L430 AbstractCegarLoop]: === Iteration 26 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:12,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:12,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1221937294, now seen corresponding path program 19 times [2021-06-05 15:03:12,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:12,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81872384] [2021-06-05 15:03:12,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:12,312 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 15:03:12,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:12,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81872384] [2021-06-05 15:03:12,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81872384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:12,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84448852] [2021-06-05 15:03:12,313 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 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 15:03:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:12,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:03:12,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:12,442 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 13 treesize of output 9 [2021-06-05 15:03:12,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:12,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:12,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:12,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:25 [2021-06-05 15:03:12,554 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 15:03:12,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84448852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:12,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:12,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:12,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732006519] [2021-06-05 15:03:12,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:12,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:12,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:12,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:12,555 INFO L87 Difference]: Start difference. First operand 1990 states and 8444 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:13,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:13,103 INFO L93 Difference]: Finished difference Result 2682 states and 10901 transitions. [2021-06-05 15:03:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:03:13,104 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:13,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:13,110 INFO L225 Difference]: With dead ends: 2682 [2021-06-05 15:03:13,111 INFO L226 Difference]: Without dead ends: 2632 [2021-06-05 15:03:13,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 428.3ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:03:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-06-05 15:03:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2066. [2021-06-05 15:03:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 4.24455205811138) internal successors, (8765), 2065 states have internal predecessors, (8765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:13,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 8765 transitions. [2021-06-05 15:03:13,150 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 8765 transitions. Word has length 29 [2021-06-05 15:03:13,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:13,150 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 8765 transitions. [2021-06-05 15:03:13,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:13,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 8765 transitions. [2021-06-05 15:03:13,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:13,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:13,153 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, 1, 1, 1] [2021-06-05 15:03:13,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 15:03:13,354 INFO L430 AbstractCegarLoop]: === Iteration 27 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:13,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:13,354 INFO L82 PathProgramCache]: Analyzing trace with hash -446456148, now seen corresponding path program 20 times [2021-06-05 15:03:13,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:13,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399470928] [2021-06-05 15:03:13,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:13,479 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 15:03:13,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:13,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399470928] [2021-06-05 15:03:13,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399470928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:13,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214718951] [2021-06-05 15:03:13,480 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 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 15:03:13,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:13,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:13,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:13,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:13,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:13,618 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 13 treesize of output 17 [2021-06-05 15:03:13,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:13,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:13,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:13,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 15:03:13,744 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 15:03:13,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214718951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:13,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:13,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:13,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75762519] [2021-06-05 15:03:13,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:13,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:13,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:13,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:13,745 INFO L87 Difference]: Start difference. First operand 2066 states and 8765 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:14,341 INFO L93 Difference]: Finished difference Result 2516 states and 10449 transitions. [2021-06-05 15:03:14,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:03:14,341 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:14,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:14,348 INFO L225 Difference]: With dead ends: 2516 [2021-06-05 15:03:14,348 INFO L226 Difference]: Without dead ends: 2498 [2021-06-05 15:03:14,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 524.0ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:03:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-05 15:03:14,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2059. [2021-06-05 15:03:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2058 states have (on average 4.2497570456754135) internal successors, (8746), 2058 states have internal predecessors, (8746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 8746 transitions. [2021-06-05 15:03:14,380 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 8746 transitions. Word has length 29 [2021-06-05 15:03:14,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:14,380 INFO L482 AbstractCegarLoop]: Abstraction has 2059 states and 8746 transitions. [2021-06-05 15:03:14,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 8746 transitions. [2021-06-05 15:03:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:14,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:14,383 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] [2021-06-05 15:03:14,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:14,584 INFO L430 AbstractCegarLoop]: === Iteration 28 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:14,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:14,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1168550774, now seen corresponding path program 21 times [2021-06-05 15:03:14,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:14,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829398289] [2021-06-05 15:03:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:14,691 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 15:03:14,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:14,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829398289] [2021-06-05 15:03:14,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829398289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:14,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419324445] [2021-06-05 15:03:14,692 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 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 15:03:14,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:03:14,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:14,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:14,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:14,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:14,814 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 13 treesize of output 17 [2021-06-05 15:03:14,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:14,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:14,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:14,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 15:03:14,947 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 15:03:14,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419324445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:14,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:14,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:14,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833000038] [2021-06-05 15:03:14,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:14,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:14,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:14,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:14,949 INFO L87 Difference]: Start difference. First operand 2059 states and 8746 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:15,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:15,569 INFO L93 Difference]: Finished difference Result 2525 states and 10479 transitions. [2021-06-05 15:03:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:03:15,570 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:15,574 INFO L225 Difference]: With dead ends: 2525 [2021-06-05 15:03:15,575 INFO L226 Difference]: Without dead ends: 2486 [2021-06-05 15:03:15,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 541.8ms TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:03:15,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-06-05 15:03:15,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2034. [2021-06-05 15:03:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 4.254795868175111) internal successors, (8650), 2033 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 8650 transitions. [2021-06-05 15:03:15,614 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 8650 transitions. Word has length 29 [2021-06-05 15:03:15,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:15,614 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 8650 transitions. [2021-06-05 15:03:15,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:15,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 8650 transitions. [2021-06-05 15:03:15,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:15,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:15,618 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] [2021-06-05 15:03:15,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 15:03:15,839 INFO L430 AbstractCegarLoop]: === Iteration 29 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:15,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:15,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1063587426, now seen corresponding path program 22 times [2021-06-05 15:03:15,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:15,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301986596] [2021-06-05 15:03:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:15,958 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 15:03:15,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:15,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301986596] [2021-06-05 15:03:15,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301986596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:15,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316448056] [2021-06-05 15:03:15,959 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 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 15:03:16,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:16,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:03:16,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:16,089 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 13 treesize of output 9 [2021-06-05 15:03:16,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:16,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:16,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:16,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:25 [2021-06-05 15:03:16,223 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 15:03:16,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316448056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:16,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:16,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:16,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346781829] [2021-06-05 15:03:16,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:16,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:16,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:16,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:16,225 INFO L87 Difference]: Start difference. First operand 2034 states and 8650 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:16,781 INFO L93 Difference]: Finished difference Result 2413 states and 10090 transitions. [2021-06-05 15:03:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:16,781 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:16,786 INFO L225 Difference]: With dead ends: 2413 [2021-06-05 15:03:16,786 INFO L226 Difference]: Without dead ends: 2369 [2021-06-05 15:03:16,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 499.8ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:03:16,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-06-05 15:03:16,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 2037. [2021-06-05 15:03:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2037 states, 2036 states have (on average 4.251473477406679) internal successors, (8656), 2036 states have internal predecessors, (8656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 8656 transitions. [2021-06-05 15:03:16,817 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 8656 transitions. Word has length 29 [2021-06-05 15:03:16,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:16,817 INFO L482 AbstractCegarLoop]: Abstraction has 2037 states and 8656 transitions. [2021-06-05 15:03:16,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 8656 transitions. [2021-06-05 15:03:16,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:16,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:16,821 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] [2021-06-05 15:03:17,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 15:03:17,021 INFO L430 AbstractCegarLoop]: === Iteration 30 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:17,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1021005372, now seen corresponding path program 23 times [2021-06-05 15:03:17,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:17,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861582576] [2021-06-05 15:03:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:17,154 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 15:03:17,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:17,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861582576] [2021-06-05 15:03:17,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861582576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:17,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783583342] [2021-06-05 15:03:17,154 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 15:03:17,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:17,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:17,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:17,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:17,264 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 15 treesize of output 9 [2021-06-05 15:03:17,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:17,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:17,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:17,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2021-06-05 15:03:17,363 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 15:03:17,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783583342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:17,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:17,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 15:03:17,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412374257] [2021-06-05 15:03:17,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:03:17,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:17,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:03:17,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:17,364 INFO L87 Difference]: Start difference. First operand 2037 states and 8656 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:17,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:17,742 INFO L93 Difference]: Finished difference Result 2472 states and 10297 transitions. [2021-06-05 15:03:17,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:03:17,742 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:17,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:17,747 INFO L225 Difference]: With dead ends: 2472 [2021-06-05 15:03:17,747 INFO L226 Difference]: Without dead ends: 2458 [2021-06-05 15:03:17,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:03:17,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-06-05 15:03:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2027. [2021-06-05 15:03:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 4.25715695952616) internal successors, (8625), 2026 states have internal predecessors, (8625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 8625 transitions. [2021-06-05 15:03:17,787 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 8625 transitions. Word has length 29 [2021-06-05 15:03:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:17,787 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 8625 transitions. [2021-06-05 15:03:17,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 8625 transitions. [2021-06-05 15:03:17,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:17,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:17,792 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] [2021-06-05 15:03:18,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:18,014 INFO L430 AbstractCegarLoop]: === Iteration 31 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:18,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:18,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1011868340, now seen corresponding path program 24 times [2021-06-05 15:03:18,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:18,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310487088] [2021-06-05 15:03:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:18,145 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 15:03:18,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:18,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310487088] [2021-06-05 15:03:18,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310487088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:18,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341635604] [2021-06-05 15:03:18,145 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 15:03:18,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:03:18,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:18,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:18,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:18,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:18,332 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 15 treesize of output 19 [2021-06-05 15:03:18,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:18,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:18,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:18,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-05 15:03:18,436 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 15:03:18,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341635604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:18,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:18,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:18,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028486506] [2021-06-05 15:03:18,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:18,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:18,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:18,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:18,438 INFO L87 Difference]: Start difference. First operand 2027 states and 8625 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:18,906 INFO L93 Difference]: Finished difference Result 2232 states and 9404 transitions. [2021-06-05 15:03:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:03:18,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:18,912 INFO L225 Difference]: With dead ends: 2232 [2021-06-05 15:03:18,912 INFO L226 Difference]: Without dead ends: 2217 [2021-06-05 15:03:18,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:03:18,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2021-06-05 15:03:18,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2039. [2021-06-05 15:03:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 4.247791952894995) internal successors, (8657), 2038 states have internal predecessors, (8657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:18,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 8657 transitions. [2021-06-05 15:03:18,946 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 8657 transitions. Word has length 29 [2021-06-05 15:03:18,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:18,946 INFO L482 AbstractCegarLoop]: Abstraction has 2039 states and 8657 transitions. [2021-06-05 15:03:18,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:18,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 8657 transitions. [2021-06-05 15:03:18,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:18,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:18,951 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] [2021-06-05 15:03:19,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:19,165 INFO L430 AbstractCegarLoop]: === Iteration 32 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:19,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1867952308, now seen corresponding path program 25 times [2021-06-05 15:03:19,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:19,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006826184] [2021-06-05 15:03:19,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:19,283 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 15:03:19,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:19,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006826184] [2021-06-05 15:03:19,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006826184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:19,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246621599] [2021-06-05 15:03:19,283 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 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 15:03:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:19,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:03:19,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:19,373 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 15:03:19,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:19,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:19,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:19,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-05 15:03:19,503 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 15:03:19,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246621599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:19,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:19,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:19,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004356851] [2021-06-05 15:03:19,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:19,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:19,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:19,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:19,504 INFO L87 Difference]: Start difference. First operand 2039 states and 8657 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:20,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:20,571 INFO L93 Difference]: Finished difference Result 3149 states and 12904 transitions. [2021-06-05 15:03:20,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:03:20,571 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:20,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:20,578 INFO L225 Difference]: With dead ends: 3149 [2021-06-05 15:03:20,578 INFO L226 Difference]: Without dead ends: 3099 [2021-06-05 15:03:20,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 802.8ms TimeCoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:03:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2021-06-05 15:03:20,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 2218. [2021-06-05 15:03:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 4.256202074875959) internal successors, (9436), 2217 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 9436 transitions. [2021-06-05 15:03:20,618 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 9436 transitions. Word has length 29 [2021-06-05 15:03:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:20,618 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 9436 transitions. [2021-06-05 15:03:20,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 9436 transitions. [2021-06-05 15:03:20,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:20,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:20,622 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] [2021-06-05 15:03:20,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 15:03:20,823 INFO L430 AbstractCegarLoop]: === Iteration 33 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:20,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:20,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1123742382, now seen corresponding path program 26 times [2021-06-05 15:03:20,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:20,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163805653] [2021-06-05 15:03:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:20,919 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 15:03:20,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:20,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163805653] [2021-06-05 15:03:20,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163805653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:20,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813714316] [2021-06-05 15:03:20,920 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 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 15:03:20,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:20,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:20,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:20,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:21,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:21,011 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 15:03:21,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:21,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:21,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:21,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:21,147 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 15:03:21,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813714316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:21,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:21,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:21,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245897197] [2021-06-05 15:03:21,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:21,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:21,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:21,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:21,149 INFO L87 Difference]: Start difference. First operand 2218 states and 9436 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:21,766 INFO L93 Difference]: Finished difference Result 2623 states and 10952 transitions. [2021-06-05 15:03:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:21,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:21,772 INFO L225 Difference]: With dead ends: 2623 [2021-06-05 15:03:21,772 INFO L226 Difference]: Without dead ends: 2606 [2021-06-05 15:03:21,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 579.1ms TimeCoverageRelationStatistics Valid=268, Invalid=922, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:03:21,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-06-05 15:03:21,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2211. [2021-06-05 15:03:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 4.261085972850679) internal successors, (9417), 2210 states have internal predecessors, (9417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 9417 transitions. [2021-06-05 15:03:21,804 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 9417 transitions. Word has length 29 [2021-06-05 15:03:21,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:21,804 INFO L482 AbstractCegarLoop]: Abstraction has 2211 states and 9417 transitions. [2021-06-05 15:03:21,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:21,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 9417 transitions. [2021-06-05 15:03:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:21,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:21,808 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] [2021-06-05 15:03:22,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:22,009 INFO L430 AbstractCegarLoop]: === Iteration 34 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:22,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2023104454, now seen corresponding path program 27 times [2021-06-05 15:03:22,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:22,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534191357] [2021-06-05 15:03:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:22,117 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 15:03:22,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:22,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534191357] [2021-06-05 15:03:22,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534191357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:22,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882300048] [2021-06-05 15:03:22,118 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 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 15:03:22,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:03:22,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:22,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:22,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:22,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:22,251 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 15:03:22,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:22,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:22,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:22,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:22,406 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 15:03:22,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882300048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:22,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:22,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:22,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2232693] [2021-06-05 15:03:22,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:22,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:22,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:22,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:22,407 INFO L87 Difference]: Start difference. First operand 2211 states and 9417 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:23,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:23,284 INFO L93 Difference]: Finished difference Result 2750 states and 11452 transitions. [2021-06-05 15:03:23,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:03:23,289 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:23,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:23,295 INFO L225 Difference]: With dead ends: 2750 [2021-06-05 15:03:23,295 INFO L226 Difference]: Without dead ends: 2727 [2021-06-05 15:03:23,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 766.2ms TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:03:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-06-05 15:03:23,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2206. [2021-06-05 15:03:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 4.263038548752834) internal successors, (9400), 2205 states have internal predecessors, (9400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 9400 transitions. [2021-06-05 15:03:23,334 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 9400 transitions. Word has length 29 [2021-06-05 15:03:23,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:23,334 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 9400 transitions. [2021-06-05 15:03:23,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:23,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 9400 transitions. [2021-06-05 15:03:23,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:23,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:23,339 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] [2021-06-05 15:03:23,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 15:03:23,540 INFO L430 AbstractCegarLoop]: === Iteration 35 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:23,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:23,540 INFO L82 PathProgramCache]: Analyzing trace with hash 491264540, now seen corresponding path program 28 times [2021-06-05 15:03:23,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:23,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615956315] [2021-06-05 15:03:23,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:23,648 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 15:03:23,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:23,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615956315] [2021-06-05 15:03:23,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615956315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:23,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467489135] [2021-06-05 15:03:23,649 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 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 15:03:23,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:23,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:23,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:03:23,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:23,758 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 15:03:23,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:23,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:23,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:23,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-05 15:03:23,894 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 15:03:23,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467489135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:23,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:23,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:23,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916982606] [2021-06-05 15:03:23,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:23,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:23,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:23,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:23,895 INFO L87 Difference]: Start difference. First operand 2206 states and 9400 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:24,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:24,484 INFO L93 Difference]: Finished difference Result 2858 states and 11700 transitions. [2021-06-05 15:03:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:03:24,484 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:24,490 INFO L225 Difference]: With dead ends: 2858 [2021-06-05 15:03:24,490 INFO L226 Difference]: Without dead ends: 2802 [2021-06-05 15:03:24,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 497.4ms TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:03:24,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2021-06-05 15:03:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 2142. [2021-06-05 15:03:24,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 4.280709948622139) internal successors, (9165), 2141 states have internal predecessors, (9165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 9165 transitions. [2021-06-05 15:03:24,525 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 9165 transitions. Word has length 29 [2021-06-05 15:03:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:24,525 INFO L482 AbstractCegarLoop]: Abstraction has 2142 states and 9165 transitions. [2021-06-05 15:03:24,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 9165 transitions. [2021-06-05 15:03:24,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:24,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:24,529 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] [2021-06-05 15:03:24,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 15:03:24,732 INFO L430 AbstractCegarLoop]: === Iteration 36 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:24,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:24,732 INFO L82 PathProgramCache]: Analyzing trace with hash 885700194, now seen corresponding path program 29 times [2021-06-05 15:03:24,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:24,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106311600] [2021-06-05 15:03:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:24,840 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 15:03:24,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:24,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106311600] [2021-06-05 15:03:24,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106311600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:24,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913383916] [2021-06-05 15:03:24,840 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 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 15:03:24,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:24,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:24,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:24,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:24,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:03:24,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:24,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:24,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:24,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:03:25,036 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 15:03:25,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913383916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:25,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:25,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 15:03:25,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117527589] [2021-06-05 15:03:25,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:03:25,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:25,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:03:25,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:25,037 INFO L87 Difference]: Start difference. First operand 2142 states and 9165 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:25,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:25,579 INFO L93 Difference]: Finished difference Result 2438 states and 10308 transitions. [2021-06-05 15:03:25,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:03:25,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:25,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:25,584 INFO L225 Difference]: With dead ends: 2438 [2021-06-05 15:03:25,584 INFO L226 Difference]: Without dead ends: 2423 [2021-06-05 15:03:25,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 498.4ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:03:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-05 15:03:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2139. [2021-06-05 15:03:25,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 4.2820392890551915) internal successors, (9155), 2138 states have internal predecessors, (9155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:25,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 9155 transitions. [2021-06-05 15:03:25,616 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 9155 transitions. Word has length 29 [2021-06-05 15:03:25,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:25,617 INFO L482 AbstractCegarLoop]: Abstraction has 2139 states and 9155 transitions. [2021-06-05 15:03:25,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:25,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 9155 transitions. [2021-06-05 15:03:25,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:25,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:25,621 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] [2021-06-05 15:03:25,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 15:03:25,825 INFO L430 AbstractCegarLoop]: === Iteration 37 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:25,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:25,825 INFO L82 PathProgramCache]: Analyzing trace with hash -163072208, now seen corresponding path program 30 times [2021-06-05 15:03:25,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:25,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15602399] [2021-06-05 15:03:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:25,928 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 15:03:25,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:25,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15602399] [2021-06-05 15:03:25,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15602399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:25,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533656385] [2021-06-05 15:03:25,929 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 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 15:03:25,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:03:25,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:25,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:25,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:26,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:26,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 15:03:26,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:26,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:26,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:26,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:26,239 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 15:03:26,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533656385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:26,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:26,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:26,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79114648] [2021-06-05 15:03:26,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:26,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:26,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:26,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:26,241 INFO L87 Difference]: Start difference. First operand 2139 states and 9155 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:27,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:27,049 INFO L93 Difference]: Finished difference Result 2816 states and 11722 transitions. [2021-06-05 15:03:27,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:03:27,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:27,056 INFO L225 Difference]: With dead ends: 2816 [2021-06-05 15:03:27,056 INFO L226 Difference]: Without dead ends: 2797 [2021-06-05 15:03:27,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 739.7ms TimeCoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:03:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-06-05 15:03:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2209. [2021-06-05 15:03:27,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 4.291213768115942) internal successors, (9475), 2208 states have internal predecessors, (9475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:27,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 9475 transitions. [2021-06-05 15:03:27,093 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 9475 transitions. Word has length 29 [2021-06-05 15:03:27,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:27,093 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 9475 transitions. [2021-06-05 15:03:27,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:27,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 9475 transitions. [2021-06-05 15:03:27,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:27,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:27,097 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] [2021-06-05 15:03:27,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 15:03:27,297 INFO L430 AbstractCegarLoop]: === Iteration 38 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:27,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:27,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1140200398, now seen corresponding path program 31 times [2021-06-05 15:03:27,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:27,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952726250] [2021-06-05 15:03:27,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:27,424 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 15:03:27,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:27,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952726250] [2021-06-05 15:03:27,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952726250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:27,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479739519] [2021-06-05 15:03:27,425 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 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 15:03:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:27,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:03:27,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:27,534 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 15:03:27,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:27,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:27,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:27,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-05 15:03:27,696 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 15:03:27,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479739519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:27,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:27,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:27,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723896571] [2021-06-05 15:03:27,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:27,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:27,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:27,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:27,699 INFO L87 Difference]: Start difference. First operand 2209 states and 9475 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:28,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:28,464 INFO L93 Difference]: Finished difference Result 3033 states and 12436 transitions. [2021-06-05 15:03:28,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:03:28,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:28,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:28,470 INFO L225 Difference]: With dead ends: 3033 [2021-06-05 15:03:28,471 INFO L226 Difference]: Without dead ends: 2989 [2021-06-05 15:03:28,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 613.3ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:03:28,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2021-06-05 15:03:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2226. [2021-06-05 15:03:28,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 4.273707865168539) internal successors, (9509), 2225 states have internal predecessors, (9509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:28,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 9509 transitions. [2021-06-05 15:03:28,510 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 9509 transitions. Word has length 29 [2021-06-05 15:03:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:28,511 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 9509 transitions. [2021-06-05 15:03:28,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 9509 transitions. [2021-06-05 15:03:28,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:28,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:28,514 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] [2021-06-05 15:03:28,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 15:03:28,715 INFO L430 AbstractCegarLoop]: === Iteration 39 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:28,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:28,715 INFO L82 PathProgramCache]: Analyzing trace with hash -528193044, now seen corresponding path program 32 times [2021-06-05 15:03:28,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:28,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826970204] [2021-06-05 15:03:28,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:28,817 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 15:03:28,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:28,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826970204] [2021-06-05 15:03:28,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826970204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:28,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423325353] [2021-06-05 15:03:28,818 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 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 15:03:28,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:28,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:28,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:28,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:28,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:28,925 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 15:03:28,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:28,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:28,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:28,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:29,075 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 15:03:29,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423325353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:29,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:29,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:29,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683785848] [2021-06-05 15:03:29,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:29,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:29,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:29,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:29,077 INFO L87 Difference]: Start difference. First operand 2226 states and 9509 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:29,702 INFO L93 Difference]: Finished difference Result 2675 states and 11138 transitions. [2021-06-05 15:03:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:29,703 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:29,708 INFO L225 Difference]: With dead ends: 2675 [2021-06-05 15:03:29,708 INFO L226 Difference]: Without dead ends: 2657 [2021-06-05 15:03:29,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 581.8ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:03:29,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-06-05 15:03:29,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2219. [2021-06-05 15:03:29,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 2218 states have (on average 4.278629395852119) internal successors, (9490), 2218 states have internal predecessors, (9490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 9490 transitions. [2021-06-05 15:03:29,738 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 9490 transitions. Word has length 29 [2021-06-05 15:03:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:29,738 INFO L482 AbstractCegarLoop]: Abstraction has 2219 states and 9490 transitions. [2021-06-05 15:03:29,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 9490 transitions. [2021-06-05 15:03:29,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:29,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:29,741 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] [2021-06-05 15:03:29,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 15:03:29,942 INFO L430 AbstractCegarLoop]: === Iteration 40 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:29,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:29,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1086813878, now seen corresponding path program 33 times [2021-06-05 15:03:29,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:29,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115027629] [2021-06-05 15:03:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:30,038 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 15:03:30,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:30,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115027629] [2021-06-05 15:03:30,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115027629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:30,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101715542] [2021-06-05 15:03:30,038 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 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 15:03:30,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:03:30,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:30,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:30,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:30,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:30,143 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 15:03:30,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:30,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:30,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:30,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:30,322 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 15:03:30,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101715542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:30,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:30,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:30,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787553639] [2021-06-05 15:03:30,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:30,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:30,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:30,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:30,323 INFO L87 Difference]: Start difference. First operand 2219 states and 9490 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:30,997 INFO L93 Difference]: Finished difference Result 2647 states and 11081 transitions. [2021-06-05 15:03:30,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:03:30,998 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:31,003 INFO L225 Difference]: With dead ends: 2647 [2021-06-05 15:03:31,003 INFO L226 Difference]: Without dead ends: 2608 [2021-06-05 15:03:31,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 640.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:03:31,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-05 15:03:31,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2163. [2021-06-05 15:03:31,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.279833487511564) internal successors, (9253), 2162 states have internal predecessors, (9253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 9253 transitions. [2021-06-05 15:03:31,034 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 9253 transitions. Word has length 29 [2021-06-05 15:03:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:31,034 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 9253 transitions. [2021-06-05 15:03:31,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 9253 transitions. [2021-06-05 15:03:31,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:31,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:31,037 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] [2021-06-05 15:03:31,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 15:03:31,237 INFO L430 AbstractCegarLoop]: === Iteration 41 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:31,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:31,238 INFO L82 PathProgramCache]: Analyzing trace with hash 356160112, now seen corresponding path program 34 times [2021-06-05 15:03:31,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:31,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057997929] [2021-06-05 15:03:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:31,355 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 15:03:31,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:31,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057997929] [2021-06-05 15:03:31,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057997929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:31,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726706717] [2021-06-05 15:03:31,355 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 15:03:31,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:31,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:31,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:03:31,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:31,445 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 15:03:31,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:31,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:31,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:31,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-06-05 15:03:31,587 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 15:03:31,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726706717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:31,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:31,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:31,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666264879] [2021-06-05 15:03:31,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:31,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:31,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:31,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:31,588 INFO L87 Difference]: Start difference. First operand 2163 states and 9253 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:32,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:32,367 INFO L93 Difference]: Finished difference Result 2735 states and 11521 transitions. [2021-06-05 15:03:32,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:03:32,367 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:32,373 INFO L225 Difference]: With dead ends: 2735 [2021-06-05 15:03:32,373 INFO L226 Difference]: Without dead ends: 2695 [2021-06-05 15:03:32,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 629.2ms TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:03:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-06-05 15:03:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2163. [2021-06-05 15:03:32,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.277983348751157) internal successors, (9249), 2162 states have internal predecessors, (9249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 9249 transitions. [2021-06-05 15:03:32,427 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 9249 transitions. Word has length 29 [2021-06-05 15:03:32,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:32,427 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 9249 transitions. [2021-06-05 15:03:32,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:32,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 9249 transitions. [2021-06-05 15:03:32,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:32,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:32,431 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] [2021-06-05 15:03:32,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:32,633 INFO L430 AbstractCegarLoop]: === Iteration 42 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:32,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:32,633 INFO L82 PathProgramCache]: Analyzing trace with hash -207437312, now seen corresponding path program 35 times [2021-06-05 15:03:32,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:32,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755658207] [2021-06-05 15:03:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:32,740 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 15:03:32,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:32,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755658207] [2021-06-05 15:03:32,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755658207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:32,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905714263] [2021-06-05 15:03:32,741 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 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 15:03:32,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:03:32,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:32,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:32,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:32,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:03:32,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:32,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:32,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:32,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:03:32,952 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 15:03:32,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905714263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:32,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:32,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 15:03:32,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746546026] [2021-06-05 15:03:32,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:03:32,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:32,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:03:32,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:32,954 INFO L87 Difference]: Start difference. First operand 2163 states and 9249 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:33,512 INFO L93 Difference]: Finished difference Result 2788 states and 11737 transitions. [2021-06-05 15:03:33,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:33,513 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:33,519 INFO L225 Difference]: With dead ends: 2788 [2021-06-05 15:03:33,519 INFO L226 Difference]: Without dead ends: 2765 [2021-06-05 15:03:33,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 469.4ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:03:33,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2021-06-05 15:03:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2163. [2021-06-05 15:03:33,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.277983348751157) internal successors, (9249), 2162 states have internal predecessors, (9249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 9249 transitions. [2021-06-05 15:03:33,554 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 9249 transitions. Word has length 29 [2021-06-05 15:03:33,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:33,554 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 9249 transitions. [2021-06-05 15:03:33,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:33,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 9249 transitions. [2021-06-05 15:03:33,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:33,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:33,558 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] [2021-06-05 15:03:33,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:33,758 INFO L430 AbstractCegarLoop]: === Iteration 43 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:33,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:33,759 INFO L82 PathProgramCache]: Analyzing trace with hash 828150992, now seen corresponding path program 1 times [2021-06-05 15:03:33,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:33,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46212527] [2021-06-05 15:03:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:33,976 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 15:03:33,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:33,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46212527] [2021-06-05 15:03:33,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46212527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:33,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687793526] [2021-06-05 15:03:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:03:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:34,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:34,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:34,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:34,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:34,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:34,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:34,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 15:03:34,165 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 15:03:34,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687793526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:34,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:34,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 15:03:34,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264316759] [2021-06-05 15:03:34,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:34,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:34,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:34,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:34,166 INFO L87 Difference]: Start difference. First operand 2163 states and 9249 transitions. Second operand has 15 states, 15 states have (on average 3.0) 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 15:03:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:34,420 INFO L93 Difference]: Finished difference Result 2918 states and 12253 transitions. [2021-06-05 15:03:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:03:34,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) 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 29 [2021-06-05 15:03:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:34,427 INFO L225 Difference]: With dead ends: 2918 [2021-06-05 15:03:34,427 INFO L226 Difference]: Without dead ends: 2899 [2021-06-05 15:03:34,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:34,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-06-05 15:03:34,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2351. [2021-06-05 15:03:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 4.279148936170213) internal successors, (10056), 2350 states have internal predecessors, (10056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 10056 transitions. [2021-06-05 15:03:34,464 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 10056 transitions. Word has length 29 [2021-06-05 15:03:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:34,465 INFO L482 AbstractCegarLoop]: Abstraction has 2351 states and 10056 transitions. [2021-06-05 15:03:34,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) 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 15:03:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 10056 transitions. [2021-06-05 15:03:34,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:34,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:34,469 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] [2021-06-05 15:03:34,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:34,669 INFO L430 AbstractCegarLoop]: === Iteration 44 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2044461478, now seen corresponding path program 2 times [2021-06-05 15:03:34,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:34,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272557325] [2021-06-05 15:03:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:34,858 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 15:03:34,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:34,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272557325] [2021-06-05 15:03:34,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272557325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:34,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552898360] [2021-06-05 15:03:34,859 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 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 15:03:34,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:34,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:34,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:34,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:34,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:34,965 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 13 treesize of output 17 [2021-06-05 15:03:34,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:34,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:34,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:34,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 15:03:35,085 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 15:03:35,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552898360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:35,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:35,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:35,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064849367] [2021-06-05 15:03:35,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:35,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:35,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:35,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:35,087 INFO L87 Difference]: Start difference. First operand 2351 states and 10056 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:35,538 INFO L93 Difference]: Finished difference Result 2782 states and 11686 transitions. [2021-06-05 15:03:35,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:03:35,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:35,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:35,544 INFO L225 Difference]: With dead ends: 2782 [2021-06-05 15:03:35,544 INFO L226 Difference]: Without dead ends: 2769 [2021-06-05 15:03:35,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 509.6ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:03:35,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-06-05 15:03:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 2342. [2021-06-05 15:03:35,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 4.282785134557881) internal successors, (10026), 2341 states have internal predecessors, (10026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 10026 transitions. [2021-06-05 15:03:35,591 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 10026 transitions. Word has length 29 [2021-06-05 15:03:35,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:35,591 INFO L482 AbstractCegarLoop]: Abstraction has 2342 states and 10026 transitions. [2021-06-05 15:03:35,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 10026 transitions. [2021-06-05 15:03:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:35,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:35,595 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] [2021-06-05 15:03:35,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 15:03:35,818 INFO L430 AbstractCegarLoop]: === Iteration 45 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:35,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1805403798, now seen corresponding path program 3 times [2021-06-05 15:03:35,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:35,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059409718] [2021-06-05 15:03:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:36,017 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 15:03:36,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:36,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059409718] [2021-06-05 15:03:36,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059409718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108895853] [2021-06-05 15:03:36,018 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 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 15:03:36,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:03:36,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:36,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:36,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:36,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:36,147 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-05 15:03:36,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:36,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:36,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:36,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 15:03:36,290 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 15:03:36,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108895853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:36,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:36,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32889569] [2021-06-05 15:03:36,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:36,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:36,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:36,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:36,291 INFO L87 Difference]: Start difference. First operand 2342 states and 10026 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:36,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:36,979 INFO L93 Difference]: Finished difference Result 2795 states and 11675 transitions. [2021-06-05 15:03:36,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:36,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:36,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:36,985 INFO L225 Difference]: With dead ends: 2795 [2021-06-05 15:03:36,985 INFO L226 Difference]: Without dead ends: 2780 [2021-06-05 15:03:36,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 724.4ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:03:36,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2021-06-05 15:03:37,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2349. [2021-06-05 15:03:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 4.2789608177172065) internal successors, (10047), 2348 states have internal predecessors, (10047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 10047 transitions. [2021-06-05 15:03:37,025 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 10047 transitions. Word has length 29 [2021-06-05 15:03:37,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:37,025 INFO L482 AbstractCegarLoop]: Abstraction has 2349 states and 10047 transitions. [2021-06-05 15:03:37,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 10047 transitions. [2021-06-05 15:03:37,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:37,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:37,028 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] [2021-06-05 15:03:37,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:37,229 INFO L430 AbstractCegarLoop]: === Iteration 46 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:37,229 INFO L82 PathProgramCache]: Analyzing trace with hash 24805496, now seen corresponding path program 4 times [2021-06-05 15:03:37,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:37,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033380073] [2021-06-05 15:03:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:37,451 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 15:03:37,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:37,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033380073] [2021-06-05 15:03:37,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033380073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:37,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304866459] [2021-06-05 15:03:37,452 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 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 15:03:37,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:37,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:37,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:37,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:37,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:37,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:37,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:37,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 15:03:37,648 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 15:03:37,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304866459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:37,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:37,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 15:03:37,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520267475] [2021-06-05 15:03:37,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:03:37,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:37,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:03:37,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:37,649 INFO L87 Difference]: Start difference. First operand 2349 states and 10047 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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 15:03:37,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:37,865 INFO L93 Difference]: Finished difference Result 2946 states and 12322 transitions. [2021-06-05 15:03:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:03:37,865 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 29 [2021-06-05 15:03:37,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:37,871 INFO L225 Difference]: With dead ends: 2946 [2021-06-05 15:03:37,871 INFO L226 Difference]: Without dead ends: 2915 [2021-06-05 15:03:37,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 319.2ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2021-06-05 15:03:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 2313. [2021-06-05 15:03:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 4.285899653979238) internal successors, (9909), 2312 states have internal predecessors, (9909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 9909 transitions. [2021-06-05 15:03:37,907 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 9909 transitions. Word has length 29 [2021-06-05 15:03:37,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:37,908 INFO L482 AbstractCegarLoop]: Abstraction has 2313 states and 9909 transitions. [2021-06-05 15:03:37,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) 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 15:03:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 9909 transitions. [2021-06-05 15:03:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:37,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:37,911 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] [2021-06-05 15:03:38,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:38,112 INFO L430 AbstractCegarLoop]: === Iteration 47 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:38,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:38,112 INFO L82 PathProgramCache]: Analyzing trace with hash -2005583254, now seen corresponding path program 5 times [2021-06-05 15:03:38,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:38,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576564727] [2021-06-05 15:03:38,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:38,305 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 15:03:38,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:38,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576564727] [2021-06-05 15:03:38,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576564727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:38,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416823672] [2021-06-05 15:03:38,306 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 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 15:03:38,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:38,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:38,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:03:38,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:38,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 15:03:38,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:38,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:38,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:38,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:12 [2021-06-05 15:03:38,494 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 15:03:38,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416823672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:38,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:38,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 15:03:38,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966572228] [2021-06-05 15:03:38,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:03:38,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:38,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:03:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:38,495 INFO L87 Difference]: Start difference. First operand 2313 states and 9909 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:38,786 INFO L93 Difference]: Finished difference Result 2525 states and 10682 transitions. [2021-06-05 15:03:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:38,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:38,791 INFO L225 Difference]: With dead ends: 2525 [2021-06-05 15:03:38,791 INFO L226 Difference]: Without dead ends: 2510 [2021-06-05 15:03:38,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 331.7ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:38,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-06-05 15:03:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2301. [2021-06-05 15:03:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 4.288260869565217) internal successors, (9863), 2300 states have internal predecessors, (9863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 9863 transitions. [2021-06-05 15:03:38,819 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 9863 transitions. Word has length 29 [2021-06-05 15:03:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:38,820 INFO L482 AbstractCegarLoop]: Abstraction has 2301 states and 9863 transitions. [2021-06-05 15:03:38,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 9863 transitions. [2021-06-05 15:03:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:38,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:38,823 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] [2021-06-05 15:03:39,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 15:03:39,023 INFO L430 AbstractCegarLoop]: === Iteration 48 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:39,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:39,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1642415852, now seen corresponding path program 6 times [2021-06-05 15:03:39,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:39,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49756771] [2021-06-05 15:03:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:39,215 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 15:03:39,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:39,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49756771] [2021-06-05 15:03:39,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49756771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:39,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409227525] [2021-06-05 15:03:39,216 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 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 15:03:39,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:03:39,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:39,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:39,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:39,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:39,379 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 15 treesize of output 19 [2021-06-05 15:03:39,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:39,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:39,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:39,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-05 15:03:39,463 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 15:03:39,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409227525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:39,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:39,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:39,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867376745] [2021-06-05 15:03:39,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:39,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:39,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:39,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:39,465 INFO L87 Difference]: Start difference. First operand 2301 states and 9863 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:39,921 INFO L93 Difference]: Finished difference Result 2395 states and 10165 transitions. [2021-06-05 15:03:39,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:03:39,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:39,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:39,926 INFO L225 Difference]: With dead ends: 2395 [2021-06-05 15:03:39,926 INFO L226 Difference]: Without dead ends: 2380 [2021-06-05 15:03:39,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 517.9ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:03:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-06-05 15:03:39,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2295. [2021-06-05 15:03:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2294 states have (on average 4.291194420226678) internal successors, (9844), 2294 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:39,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 9844 transitions. [2021-06-05 15:03:39,961 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 9844 transitions. Word has length 29 [2021-06-05 15:03:39,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:39,961 INFO L482 AbstractCegarLoop]: Abstraction has 2295 states and 9844 transitions. [2021-06-05 15:03:39,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 9844 transitions. [2021-06-05 15:03:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:39,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:39,966 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] [2021-06-05 15:03:40,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 15:03:40,181 INFO L430 AbstractCegarLoop]: === Iteration 49 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:40,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:40,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1042410156, now seen corresponding path program 7 times [2021-06-05 15:03:40,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:40,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329511710] [2021-06-05 15:03:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:40,323 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 15:03:40,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:40,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329511710] [2021-06-05 15:03:40,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329511710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:40,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083218770] [2021-06-05 15:03:40,323 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 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 15:03:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:40,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:40,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:40,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:40,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:40,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:40,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 15:03:40,480 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 15:03:40,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083218770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:40,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:40,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 15:03:40,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84936538] [2021-06-05 15:03:40,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:40,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:40,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:40,481 INFO L87 Difference]: Start difference. First operand 2295 states and 9844 transitions. Second operand has 15 states, 15 states have (on average 3.0) 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 15:03:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:40,628 INFO L93 Difference]: Finished difference Result 2879 states and 12153 transitions. [2021-06-05 15:03:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:03:40,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) 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 29 [2021-06-05 15:03:40,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:40,634 INFO L225 Difference]: With dead ends: 2879 [2021-06-05 15:03:40,634 INFO L226 Difference]: Without dead ends: 2860 [2021-06-05 15:03:40,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 196.4ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:40,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-06-05 15:03:40,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2414. [2021-06-05 15:03:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.290509738914214) internal successors, (10353), 2413 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 10353 transitions. [2021-06-05 15:03:40,671 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 10353 transitions. Word has length 29 [2021-06-05 15:03:40,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:40,672 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 10353 transitions. [2021-06-05 15:03:40,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) 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 15:03:40,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 10353 transitions. [2021-06-05 15:03:40,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:40,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:40,675 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] [2021-06-05 15:03:40,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 15:03:40,876 INFO L430 AbstractCegarLoop]: === Iteration 50 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:40,876 INFO L82 PathProgramCache]: Analyzing trace with hash 379944670, now seen corresponding path program 8 times [2021-06-05 15:03:40,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:40,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611069302] [2021-06-05 15:03:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:41,014 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 15:03:41,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:41,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611069302] [2021-06-05 15:03:41,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611069302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:41,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382031503] [2021-06-05 15:03:41,014 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 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 15:03:41,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:41,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:41,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:41,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:41,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:41,103 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:41,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:41,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:41,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:41,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:41,263 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 15:03:41,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382031503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:41,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:41,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:41,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505228578] [2021-06-05 15:03:41,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:41,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:41,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:41,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:41,264 INFO L87 Difference]: Start difference. First operand 2414 states and 10353 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:41,776 INFO L93 Difference]: Finished difference Result 2775 states and 11682 transitions. [2021-06-05 15:03:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:41,776 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:41,782 INFO L225 Difference]: With dead ends: 2775 [2021-06-05 15:03:41,782 INFO L226 Difference]: Without dead ends: 2762 [2021-06-05 15:03:41,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 499.4ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:03:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2021-06-05 15:03:41,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 2405. [2021-06-05 15:03:41,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2404 states have (on average 4.294093178036606) internal successors, (10323), 2404 states have internal predecessors, (10323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 10323 transitions. [2021-06-05 15:03:41,816 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 10323 transitions. Word has length 29 [2021-06-05 15:03:41,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:41,817 INFO L482 AbstractCegarLoop]: Abstraction has 2405 states and 10323 transitions. [2021-06-05 15:03:41,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 10323 transitions. [2021-06-05 15:03:41,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:41,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:41,820 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] [2021-06-05 15:03:42,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:42,021 INFO L430 AbstractCegarLoop]: === Iteration 51 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:42,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:42,021 INFO L82 PathProgramCache]: Analyzing trace with hash -65157350, now seen corresponding path program 9 times [2021-06-05 15:03:42,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:42,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970119303] [2021-06-05 15:03:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:42,202 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 15:03:42,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:42,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970119303] [2021-06-05 15:03:42,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970119303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:42,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332912987] [2021-06-05 15:03:42,202 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 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 15:03:42,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:03:42,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:42,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:42,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:42,308 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 15:03:42,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:42,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:42,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:42,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:42,459 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 15:03:42,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332912987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:42,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:42,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:42,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066315188] [2021-06-05 15:03:42,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:42,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:42,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:42,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:42,461 INFO L87 Difference]: Start difference. First operand 2405 states and 10323 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:43,227 INFO L93 Difference]: Finished difference Result 2803 states and 11726 transitions. [2021-06-05 15:03:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:03:43,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:43,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:43,233 INFO L225 Difference]: With dead ends: 2803 [2021-06-05 15:03:43,233 INFO L226 Difference]: Without dead ends: 2788 [2021-06-05 15:03:43,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 753.4ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:03:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2788 states. [2021-06-05 15:03:43,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2788 to 2412. [2021-06-05 15:03:43,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 4.290335960182497) internal successors, (10344), 2411 states have internal predecessors, (10344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:43,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 10344 transitions. [2021-06-05 15:03:43,265 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 10344 transitions. Word has length 29 [2021-06-05 15:03:43,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:43,265 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 10344 transitions. [2021-06-05 15:03:43,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:43,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 10344 transitions. [2021-06-05 15:03:43,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:43,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:43,269 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] [2021-06-05 15:03:43,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:43,470 INFO L430 AbstractCegarLoop]: === Iteration 52 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:43,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:43,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1845755652, now seen corresponding path program 10 times [2021-06-05 15:03:43,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:43,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343289836] [2021-06-05 15:03:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:43,618 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 15:03:43,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:43,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343289836] [2021-06-05 15:03:43,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343289836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:43,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084837868] [2021-06-05 15:03:43,619 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 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 15:03:43,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:43,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:43,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:43,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:43,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:43,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:43,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:43,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:43,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 15:03:43,783 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 15:03:43,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084837868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:43,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:43,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 15:03:43,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651708115] [2021-06-05 15:03:43,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:03:43,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:43,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:03:43,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:43,785 INFO L87 Difference]: Start difference. First operand 2412 states and 10344 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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 15:03:43,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:43,952 INFO L93 Difference]: Finished difference Result 2907 states and 12222 transitions. [2021-06-05 15:03:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:03:43,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 29 [2021-06-05 15:03:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:43,959 INFO L225 Difference]: With dead ends: 2907 [2021-06-05 15:03:43,959 INFO L226 Difference]: Without dead ends: 2876 [2021-06-05 15:03:43,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-05 15:03:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2334. [2021-06-05 15:03:43,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 4.294470638662666) internal successors, (10019), 2333 states have internal predecessors, (10019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:43,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 10019 transitions. [2021-06-05 15:03:43,994 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 10019 transitions. Word has length 29 [2021-06-05 15:03:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:43,994 INFO L482 AbstractCegarLoop]: Abstraction has 2334 states and 10019 transitions. [2021-06-05 15:03:43,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) 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 15:03:43,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 10019 transitions. [2021-06-05 15:03:43,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:43,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:43,997 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] [2021-06-05 15:03:44,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:44,198 INFO L430 AbstractCegarLoop]: === Iteration 53 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:44,198 INFO L82 PathProgramCache]: Analyzing trace with hash 418822894, now seen corresponding path program 11 times [2021-06-05 15:03:44,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:44,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648248321] [2021-06-05 15:03:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:44,348 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 15:03:44,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:44,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648248321] [2021-06-05 15:03:44,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648248321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:44,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077459239] [2021-06-05 15:03:44,349 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 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 15:03:44,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:44,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:44,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:44,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:44,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:44,441 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 13 treesize of output 7 [2021-06-05 15:03:44,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:44,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:44,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:44,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 15:03:44,558 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 15:03:44,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077459239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:44,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:44,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 15:03:44,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014918693] [2021-06-05 15:03:44,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:03:44,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:44,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:03:44,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:44,559 INFO L87 Difference]: Start difference. First operand 2334 states and 10019 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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 15:03:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:44,761 INFO L93 Difference]: Finished difference Result 2453 states and 10448 transitions. [2021-06-05 15:03:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:03:44,761 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 29 [2021-06-05 15:03:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:44,766 INFO L225 Difference]: With dead ends: 2453 [2021-06-05 15:03:44,767 INFO L226 Difference]: Without dead ends: 2438 [2021-06-05 15:03:44,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:44,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-06-05 15:03:44,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2304. [2021-06-05 15:03:44,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 4.291359096830221) internal successors, (9883), 2303 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 9883 transitions. [2021-06-05 15:03:44,806 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 9883 transitions. Word has length 29 [2021-06-05 15:03:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:44,806 INFO L482 AbstractCegarLoop]: Abstraction has 2304 states and 9883 transitions. [2021-06-05 15:03:44,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) 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 15:03:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 9883 transitions. [2021-06-05 15:03:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:44,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:44,810 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] [2021-06-05 15:03:45,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:45,010 INFO L430 AbstractCegarLoop]: === Iteration 54 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:45,011 INFO L82 PathProgramCache]: Analyzing trace with hash -945227760, now seen corresponding path program 12 times [2021-06-05 15:03:45,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:45,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677724551] [2021-06-05 15:03:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:45,145 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 15:03:45,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:45,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677724551] [2021-06-05 15:03:45,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677724551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:45,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065663460] [2021-06-05 15:03:45,146 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 15:03:45,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:03:45,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:45,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:45,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:45,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:45,237 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 15:03:45,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:45,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:45,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:45,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:45,375 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 15:03:45,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065663460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:45,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:45,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:03:45,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053688090] [2021-06-05 15:03:45,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:03:45,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:45,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:03:45,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:45,376 INFO L87 Difference]: Start difference. First operand 2304 states and 9883 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:45,958 INFO L93 Difference]: Finished difference Result 2813 states and 11728 transitions. [2021-06-05 15:03:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:45,958 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:45,963 INFO L225 Difference]: With dead ends: 2813 [2021-06-05 15:03:45,963 INFO L226 Difference]: Without dead ends: 2794 [2021-06-05 15:03:45,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 546.2ms TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:03:45,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-06-05 15:03:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 2390. [2021-06-05 15:03:45,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 4.2951025533696106) internal successors, (10261), 2389 states have internal predecessors, (10261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 10261 transitions. [2021-06-05 15:03:46,005 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 10261 transitions. Word has length 29 [2021-06-05 15:03:46,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:46,006 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 10261 transitions. [2021-06-05 15:03:46,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 10261 transitions. [2021-06-05 15:03:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:46,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:46,010 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] [2021-06-05 15:03:46,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 15:03:46,233 INFO L430 AbstractCegarLoop]: === Iteration 55 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash 477127066, now seen corresponding path program 13 times [2021-06-05 15:03:46,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:46,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341278166] [2021-06-05 15:03:46,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:46,375 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 15:03:46,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:46,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341278166] [2021-06-05 15:03:46,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341278166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:46,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502287398] [2021-06-05 15:03:46,376 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 15:03:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:46,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:46,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:46,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:46,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:46,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:46,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:46,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 15:03:46,551 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 15:03:46,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502287398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:46,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:46,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 15:03:46,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46323492] [2021-06-05 15:03:46,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:03:46,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:46,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:03:46,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:46,552 INFO L87 Difference]: Start difference. First operand 2390 states and 10261 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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 15:03:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:46,715 INFO L93 Difference]: Finished difference Result 2890 states and 12136 transitions. [2021-06-05 15:03:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:03:46,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 29 [2021-06-05 15:03:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:46,721 INFO L225 Difference]: With dead ends: 2890 [2021-06-05 15:03:46,721 INFO L226 Difference]: Without dead ends: 2875 [2021-06-05 15:03:46,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-06-05 15:03:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2409. [2021-06-05 15:03:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 4.284883720930233) internal successors, (10318), 2408 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 10318 transitions. [2021-06-05 15:03:46,777 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 10318 transitions. Word has length 29 [2021-06-05 15:03:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:46,777 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 10318 transitions. [2021-06-05 15:03:46,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) 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 15:03:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 10318 transitions. [2021-06-05 15:03:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:46,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:46,781 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] [2021-06-05 15:03:46,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:46,982 INFO L430 AbstractCegarLoop]: === Iteration 56 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:46,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:46,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1191266376, now seen corresponding path program 14 times [2021-06-05 15:03:46,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:46,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755358546] [2021-06-05 15:03:46,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:47,135 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 15:03:47,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:47,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755358546] [2021-06-05 15:03:47,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755358546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:47,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737530511] [2021-06-05 15:03:47,136 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 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 15:03:47,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:47,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:47,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:47,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:47,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:47,235 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 15:03:47,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:47,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:47,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:47,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:47,368 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 15:03:47,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737530511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:47,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:47,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:03:47,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308351410] [2021-06-05 15:03:47,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:03:47,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:47,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:03:47,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:47,369 INFO L87 Difference]: Start difference. First operand 2409 states and 10318 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 15:03:47,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:47,846 INFO L93 Difference]: Finished difference Result 2798 states and 11679 transitions. [2021-06-05 15:03:47,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:03:47,846 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 29 [2021-06-05 15:03:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:47,852 INFO L225 Difference]: With dead ends: 2798 [2021-06-05 15:03:47,852 INFO L226 Difference]: Without dead ends: 2784 [2021-06-05 15:03:47,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:03:47,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-06-05 15:03:47,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2400. [2021-06-05 15:03:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 4.2884535223009586) internal successors, (10288), 2399 states have internal predecessors, (10288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:47,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 10288 transitions. [2021-06-05 15:03:47,889 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 10288 transitions. Word has length 29 [2021-06-05 15:03:47,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:47,890 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 10288 transitions. [2021-06-05 15:03:47,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 15:03:47,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 10288 transitions. [2021-06-05 15:03:47,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:47,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:47,894 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] [2021-06-05 15:03:48,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 15:03:48,096 INFO L430 AbstractCegarLoop]: === Iteration 57 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:48,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:48,096 INFO L82 PathProgramCache]: Analyzing trace with hash 878000598, now seen corresponding path program 15 times [2021-06-05 15:03:48,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:48,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958490523] [2021-06-05 15:03:48,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:48,249 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 15:03:48,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:48,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958490523] [2021-06-05 15:03:48,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958490523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:48,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447507065] [2021-06-05 15:03:48,249 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 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 15:03:48,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:03:48,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:48,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:48,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:48,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:48,359 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 15:03:48,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:48,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:48,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:48,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:48,519 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 15:03:48,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447507065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:48,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:48,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:03:48,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835723325] [2021-06-05 15:03:48,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:03:48,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:48,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:03:48,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:48,520 INFO L87 Difference]: Start difference. First operand 2400 states and 10288 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 15:03:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:49,080 INFO L93 Difference]: Finished difference Result 2782 states and 11652 transitions. [2021-06-05 15:03:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:03:49,080 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 29 [2021-06-05 15:03:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:49,086 INFO L225 Difference]: With dead ends: 2782 [2021-06-05 15:03:49,086 INFO L226 Difference]: Without dead ends: 2759 [2021-06-05 15:03:49,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 559.3ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:03:49,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-06-05 15:03:49,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 2330. [2021-06-05 15:03:49,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 4.288535852297123) internal successors, (9988), 2329 states have internal predecessors, (9988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 9988 transitions. [2021-06-05 15:03:49,153 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 9988 transitions. Word has length 29 [2021-06-05 15:03:49,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:49,153 INFO L482 AbstractCegarLoop]: Abstraction has 2330 states and 9988 transitions. [2021-06-05 15:03:49,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 15:03:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 9988 transitions. [2021-06-05 15:03:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:49,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:49,158 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] [2021-06-05 15:03:49,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 15:03:49,373 INFO L430 AbstractCegarLoop]: === Iteration 58 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:49,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:49,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1598176080, now seen corresponding path program 16 times [2021-06-05 15:03:49,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:49,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133264262] [2021-06-05 15:03:49,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:49,527 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 15:03:49,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:49,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133264262] [2021-06-05 15:03:49,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133264262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:49,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366544642] [2021-06-05 15:03:49,528 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 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 15:03:49,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:49,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:49,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:49,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:49,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:49,603 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 13 treesize of output 7 [2021-06-05 15:03:49,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:49,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:49,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:49,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 15:03:49,691 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 15:03:49,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366544642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:49,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:49,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 15:03:49,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610636422] [2021-06-05 15:03:49,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:49,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:49,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:49,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:49,692 INFO L87 Difference]: Start difference. First operand 2330 states and 9988 transitions. Second operand has 15 states, 15 states have (on average 3.0) 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 15:03:49,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:49,895 INFO L93 Difference]: Finished difference Result 2462 states and 10428 transitions. [2021-06-05 15:03:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:03:49,896 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) 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 29 [2021-06-05 15:03:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:49,901 INFO L225 Difference]: With dead ends: 2462 [2021-06-05 15:03:49,901 INFO L226 Difference]: Without dead ends: 2443 [2021-06-05 15:03:49,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:49,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-06-05 15:03:49,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 2330. [2021-06-05 15:03:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 4.288535852297123) internal successors, (9988), 2329 states have internal predecessors, (9988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 9988 transitions. [2021-06-05 15:03:49,937 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 9988 transitions. Word has length 29 [2021-06-05 15:03:49,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:49,937 INFO L482 AbstractCegarLoop]: Abstraction has 2330 states and 9988 transitions. [2021-06-05 15:03:49,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) 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 15:03:49,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 9988 transitions. [2021-06-05 15:03:49,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [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 [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:50,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:50,142 INFO L430 AbstractCegarLoop]: === Iteration 59 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_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 -1147156396, now seen corresponding path program 17 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 [547878161] [2021-06-05 15:03:50,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:50,298 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 15:03:50,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:50,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547878161] [2021-06-05 15:03:50,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547878161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:50,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108879489] [2021-06-05 15:03:50,299 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 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 15:03:50,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:03:50,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:50,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:03:50,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:50,389 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 15:03:50,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:50,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:50,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:50,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:24 [2021-06-05 15:03:50,515 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 15:03:50,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108879489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:50,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:50,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 15:03:50,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587275363] [2021-06-05 15:03:50,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:03:50,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:50,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:03:50,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:50,516 INFO L87 Difference]: Start difference. First operand 2330 states and 9988 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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 15:03:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:50,790 INFO L93 Difference]: Finished difference Result 2897 states and 12146 transitions. [2021-06-05 15:03:50,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:50,791 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 29 [2021-06-05 15:03:50,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:50,798 INFO L225 Difference]: With dead ends: 2897 [2021-06-05 15:03:50,799 INFO L226 Difference]: Without dead ends: 2874 [2021-06-05 15:03:50,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:50,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-06-05 15:03:50,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 2325. [2021-06-05 15:03:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2324 states have (on average 4.291308089500861) internal successors, (9973), 2324 states have internal predecessors, (9973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 9973 transitions. [2021-06-05 15:03:50,849 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 9973 transitions. Word has length 29 [2021-06-05 15:03:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:50,849 INFO L482 AbstractCegarLoop]: Abstraction has 2325 states and 9973 transitions. [2021-06-05 15:03:50,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) 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 15:03:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 9973 transitions. [2021-06-05 15:03:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:50,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:50,854 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] [2021-06-05 15:03:51,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 15:03:51,077 INFO L430 AbstractCegarLoop]: === Iteration 60 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:51,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1345773056, now seen corresponding path program 18 times [2021-06-05 15:03:51,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:51,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393562079] [2021-06-05 15:03:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:51,193 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 15:03:51,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:51,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393562079] [2021-06-05 15:03:51,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393562079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:51,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731658425] [2021-06-05 15:03:51,194 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 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 15:03:51,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:03:51,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:51,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:03:51,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:51,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:51,288 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 15:03:51,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:51,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:51,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:51,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 15:03:51,416 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 15:03:51,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731658425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:51,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:51,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 15:03:51,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742474729] [2021-06-05 15:03:51,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:03:51,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:51,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:03:51,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:51,417 INFO L87 Difference]: Start difference. First operand 2325 states and 9973 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:52,065 INFO L93 Difference]: Finished difference Result 3209 states and 13477 transitions. [2021-06-05 15:03:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:03:52,065 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:52,072 INFO L225 Difference]: With dead ends: 3209 [2021-06-05 15:03:52,072 INFO L226 Difference]: Without dead ends: 3190 [2021-06-05 15:03:52,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 546.3ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:03:52,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-06-05 15:03:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2447. [2021-06-05 15:03:52,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2446 states have (on average 4.289452166802944) internal successors, (10492), 2446 states have internal predecessors, (10492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 10492 transitions. [2021-06-05 15:03:52,112 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 10492 transitions. Word has length 29 [2021-06-05 15:03:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:52,112 INFO L482 AbstractCegarLoop]: Abstraction has 2447 states and 10492 transitions. [2021-06-05 15:03:52,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 10492 transitions. [2021-06-05 15:03:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:52,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:52,118 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] [2021-06-05 15:03:52,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:52,333 INFO L430 AbstractCegarLoop]: === Iteration 61 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1526839414, now seen corresponding path program 19 times [2021-06-05 15:03:52,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:52,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506533061] [2021-06-05 15:03:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:52,419 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 15:03:52,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:52,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506533061] [2021-06-05 15:03:52,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506533061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:52,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203835745] [2021-06-05 15:03:52,420 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 15:03:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:52,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:52,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:52,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:52,511 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 13 treesize of output 7 [2021-06-05 15:03:52,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:52,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:52,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:52,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 15:03:52,588 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 15:03:52,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203835745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:52,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:52,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:52,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335904606] [2021-06-05 15:03:52,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:52,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:52,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:52,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:52,589 INFO L87 Difference]: Start difference. First operand 2447 states and 10492 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 15:03:52,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:52,747 INFO L93 Difference]: Finished difference Result 2901 states and 12201 transitions. [2021-06-05 15:03:52,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:03:52,747 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 29 [2021-06-05 15:03:52,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:52,753 INFO L225 Difference]: With dead ends: 2901 [2021-06-05 15:03:52,753 INFO L226 Difference]: Without dead ends: 2870 [2021-06-05 15:03:52,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:52,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-06-05 15:03:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2384. [2021-06-05 15:03:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 4.303399076793958) internal successors, (10255), 2383 states have internal predecessors, (10255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 10255 transitions. [2021-06-05 15:03:52,785 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 10255 transitions. Word has length 29 [2021-06-05 15:03:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:52,786 INFO L482 AbstractCegarLoop]: Abstraction has 2384 states and 10255 transitions. [2021-06-05 15:03:52,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 15:03:52,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 10255 transitions. [2021-06-05 15:03:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:52,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:52,789 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] [2021-06-05 15:03:52,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 15:03:52,989 INFO L430 AbstractCegarLoop]: === Iteration 62 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:52,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:52,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1487961190, now seen corresponding path program 20 times [2021-06-05 15:03:52,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:52,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845018947] [2021-06-05 15:03:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:53,071 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 15:03:53,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:53,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845018947] [2021-06-05 15:03:53,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845018947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:53,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942985963] [2021-06-05 15:03:53,072 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 15:03:53,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:53,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:53,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:53,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:53,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:53,155 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 15:03:53,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:53,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:53,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:53,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:53,328 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 15:03:53,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942985963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:53,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:53,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 15:03:53,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230034577] [2021-06-05 15:03:53,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:03:53,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:53,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:03:53,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:53,329 INFO L87 Difference]: Start difference. First operand 2384 states and 10255 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:53,776 INFO L93 Difference]: Finished difference Result 2549 states and 10861 transitions. [2021-06-05 15:03:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:03:53,777 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:53,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:53,781 INFO L225 Difference]: With dead ends: 2549 [2021-06-05 15:03:53,782 INFO L226 Difference]: Without dead ends: 2534 [2021-06-05 15:03:53,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 379.9ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:03:53,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-06-05 15:03:53,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2369. [2021-06-05 15:03:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 4.307010135135135) internal successors, (10199), 2368 states have internal predecessors, (10199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 10199 transitions. [2021-06-05 15:03:53,812 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 10199 transitions. Word has length 29 [2021-06-05 15:03:53,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:53,813 INFO L482 AbstractCegarLoop]: Abstraction has 2369 states and 10199 transitions. [2021-06-05 15:03:53,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 10199 transitions. [2021-06-05 15:03:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:53,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:53,816 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] [2021-06-05 15:03:54,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:54,017 INFO L430 AbstractCegarLoop]: === Iteration 63 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:54,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1442955452, now seen corresponding path program 21 times [2021-06-05 15:03:54,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:54,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759867575] [2021-06-05 15:03:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:54,110 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 15:03:54,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:54,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759867575] [2021-06-05 15:03:54,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759867575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:54,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524825931] [2021-06-05 15:03:54,111 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 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 15:03:54,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:54,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:54,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:03:54,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:54,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:54,216 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 15:03:54,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:54,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:54,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:54,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 15:03:54,339 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 15:03:54,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524825931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:54,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:54,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 15:03:54,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991095477] [2021-06-05 15:03:54,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:03:54,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:54,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:03:54,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:54,341 INFO L87 Difference]: Start difference. First operand 2369 states and 10199 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:55,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:55,027 INFO L93 Difference]: Finished difference Result 3298 states and 13754 transitions. [2021-06-05 15:03:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:03:55,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:55,034 INFO L225 Difference]: With dead ends: 3298 [2021-06-05 15:03:55,034 INFO L226 Difference]: Without dead ends: 3279 [2021-06-05 15:03:55,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:03:55,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-06-05 15:03:55,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2473. [2021-06-05 15:03:55,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 4.303398058252427) internal successors, (10638), 2472 states have internal predecessors, (10638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 10638 transitions. [2021-06-05 15:03:55,067 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 10638 transitions. Word has length 29 [2021-06-05 15:03:55,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:55,067 INFO L482 AbstractCegarLoop]: Abstraction has 2473 states and 10638 transitions. [2021-06-05 15:03:55,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 10638 transitions. [2021-06-05 15:03:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:55,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:55,071 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] [2021-06-05 15:03:55,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 15:03:55,271 INFO L430 AbstractCegarLoop]: === Iteration 64 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:55,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:55,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1429657018, now seen corresponding path program 22 times [2021-06-05 15:03:55,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:55,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100364816] [2021-06-05 15:03:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:55,355 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 15:03:55,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:55,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100364816] [2021-06-05 15:03:55,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100364816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:55,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210665349] [2021-06-05 15:03:55,356 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 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 15:03:55,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:55,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:55,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:55,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:55,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:55,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:55,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:55,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:55,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 15:03:55,527 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 15:03:55,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210665349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:55,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:55,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:55,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763749893] [2021-06-05 15:03:55,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:55,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:55,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:55,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:55,529 INFO L87 Difference]: Start difference. First operand 2473 states and 10638 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 15:03:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:55,680 INFO L93 Difference]: Finished difference Result 2928 states and 12339 transitions. [2021-06-05 15:03:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:03:55,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 29 [2021-06-05 15:03:55,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:55,687 INFO L225 Difference]: With dead ends: 2928 [2021-06-05 15:03:55,687 INFO L226 Difference]: Without dead ends: 2897 [2021-06-05 15:03:55,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-06-05 15:03:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2393. [2021-06-05 15:03:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 2392 states have (on average 4.306438127090301) internal successors, (10301), 2392 states have internal predecessors, (10301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 10301 transitions. [2021-06-05 15:03:55,720 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 10301 transitions. Word has length 29 [2021-06-05 15:03:55,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:55,720 INFO L482 AbstractCegarLoop]: Abstraction has 2393 states and 10301 transitions. [2021-06-05 15:03:55,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 15:03:55,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 10301 transitions. [2021-06-05 15:03:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:55,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:55,724 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] [2021-06-05 15:03:55,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:55,925 INFO L430 AbstractCegarLoop]: === Iteration 65 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:55,925 INFO L82 PathProgramCache]: Analyzing trace with hash -308608004, now seen corresponding path program 23 times [2021-06-05 15:03:55,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:55,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402350784] [2021-06-05 15:03:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:56,001 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 15:03:56,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:56,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402350784] [2021-06-05 15:03:56,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402350784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:56,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736698758] [2021-06-05 15:03:56,002 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 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 15:03:56,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:56,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:56,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:56,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:56,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:56,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:56,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:56,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:56,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 15:03:56,135 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 15:03:56,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736698758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:56,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:56,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 15:03:56,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95168570] [2021-06-05 15:03:56,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:03:56,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:56,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:03:56,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:03:56,136 INFO L87 Difference]: Start difference. First operand 2393 states and 10301 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 15:03:56,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:56,288 INFO L93 Difference]: Finished difference Result 2527 states and 10749 transitions. [2021-06-05 15:03:56,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:03:56,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 29 [2021-06-05 15:03:56,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:56,293 INFO L225 Difference]: With dead ends: 2527 [2021-06-05 15:03:56,293 INFO L226 Difference]: Without dead ends: 2508 [2021-06-05 15:03:56,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:56,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2021-06-05 15:03:56,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2381. [2021-06-05 15:03:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 4.310504201680672) internal successors, (10259), 2380 states have internal predecessors, (10259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 10259 transitions. [2021-06-05 15:03:56,324 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 10259 transitions. Word has length 29 [2021-06-05 15:03:56,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:56,324 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 10259 transitions. [2021-06-05 15:03:56,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 15:03:56,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 10259 transitions. [2021-06-05 15:03:56,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:56,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:56,328 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] [2021-06-05 15:03:56,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 15:03:56,528 INFO L430 AbstractCegarLoop]: === Iteration 66 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:56,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:56,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1817093934, now seen corresponding path program 24 times [2021-06-05 15:03:56,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:56,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902014008] [2021-06-05 15:03:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:56,618 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 15:03:56,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:56,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902014008] [2021-06-05 15:03:56,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902014008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:56,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663222094] [2021-06-05 15:03:56,619 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 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 15:03:56,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:03:56,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:56,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:03:56,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:56,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:56,729 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 13 treesize of output 17 [2021-06-05 15:03:56,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:56,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:56,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:56,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:17 [2021-06-05 15:03:56,849 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 15:03:56,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663222094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:56,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:56,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 15:03:56,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349419682] [2021-06-05 15:03:56,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:03:56,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:56,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:03:56,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:56,851 INFO L87 Difference]: Start difference. First operand 2381 states and 10259 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:57,728 INFO L93 Difference]: Finished difference Result 3454 states and 14369 transitions. [2021-06-05 15:03:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:57,728 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:57,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:57,735 INFO L225 Difference]: With dead ends: 3454 [2021-06-05 15:03:57,735 INFO L226 Difference]: Without dead ends: 3435 [2021-06-05 15:03:57,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:03:57,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2021-06-05 15:03:57,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2493. [2021-06-05 15:03:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2492 states have (on average 4.303370786516854) internal successors, (10724), 2492 states have internal predecessors, (10724), 0 states have call successors, (0), 0 states have call 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 L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 10724 transitions. [2021-06-05 15:03:57,774 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 10724 transitions. Word has length 29 [2021-06-05 15:03:57,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:57,774 INFO L482 AbstractCegarLoop]: Abstraction has 2493 states and 10724 transitions. [2021-06-05 15:03:57,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call 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 L276 IsEmpty]: Start isEmpty. Operand 2493 states and 10724 transitions. [2021-06-05 15:03:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:57,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:57,777 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] [2021-06-05 15:03:57,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:57,981 INFO L430 AbstractCegarLoop]: === Iteration 67 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:57,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:57,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1055518536, now seen corresponding path program 25 times [2021-06-05 15:03:57,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:57,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498520822] [2021-06-05 15:03:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:58,070 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 15:03:58,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:58,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498520822] [2021-06-05 15:03:58,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498520822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:58,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429523199] [2021-06-05 15:03:58,071 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 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 15:03:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:58,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:58,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:58,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:58,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:58,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:58,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:58,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 15:03:58,261 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 15:03:58,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429523199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:58,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:58,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 15:03:58,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750864918] [2021-06-05 15:03:58,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:03:58,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:58,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:03:58,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:03:58,263 INFO L87 Difference]: Start difference. First operand 2493 states and 10724 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 15:03:58,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:58,469 INFO L93 Difference]: Finished difference Result 3036 states and 12792 transitions. [2021-06-05 15:03:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:03:58,469 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 29 [2021-06-05 15:03:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:58,475 INFO L225 Difference]: With dead ends: 3036 [2021-06-05 15:03:58,476 INFO L226 Difference]: Without dead ends: 3005 [2021-06-05 15:03:58,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:03:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-06-05 15:03:58,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2413. [2021-06-05 15:03:58,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 4.3063847429519075) internal successors, (10387), 2412 states have internal predecessors, (10387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 10387 transitions. [2021-06-05 15:03:58,512 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 10387 transitions. Word has length 29 [2021-06-05 15:03:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:58,512 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 10387 transitions. [2021-06-05 15:03:58,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 15:03:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 10387 transitions. [2021-06-05 15:03:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:58,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:58,520 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] [2021-06-05 15:03:58,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 15:03:58,720 INFO L430 AbstractCegarLoop]: === Iteration 68 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:58,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:58,721 INFO L82 PathProgramCache]: Analyzing trace with hash 65530478, now seen corresponding path program 26 times [2021-06-05 15:03:58,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:58,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473754802] [2021-06-05 15:03:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:58,812 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 15:03:58,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:58,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473754802] [2021-06-05 15:03:58,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473754802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:58,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107372427] [2021-06-05 15:03:58,813 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 15:03:58,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:58,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:58,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:58,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:58,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:58,913 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 13 treesize of output 17 [2021-06-05 15:03:58,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:58,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:58,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:58,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 15:03:59,037 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 15:03:59,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107372427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:59,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:59,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:03:59,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043725661] [2021-06-05 15:03:59,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:03:59,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:59,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:03:59,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:59,038 INFO L87 Difference]: Start difference. First operand 2413 states and 10387 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:59,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:59,634 INFO L93 Difference]: Finished difference Result 2675 states and 11277 transitions. [2021-06-05 15:03:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:03:59,635 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:03:59,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:59,640 INFO L225 Difference]: With dead ends: 2675 [2021-06-05 15:03:59,640 INFO L226 Difference]: Without dead ends: 2656 [2021-06-05 15:03:59,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 495.8ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:03:59,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-06-05 15:03:59,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2389. [2021-06-05 15:03:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 4.306951423785595) internal successors, (10285), 2388 states have internal predecessors, (10285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 10285 transitions. [2021-06-05 15:03:59,671 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 10285 transitions. Word has length 29 [2021-06-05 15:03:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:59,671 INFO L482 AbstractCegarLoop]: Abstraction has 2389 states and 10285 transitions. [2021-06-05 15:03:59,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:59,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 10285 transitions. [2021-06-05 15:03:59,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:03:59,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:59,675 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] [2021-06-05 15:03:59,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 15:03:59,875 INFO L430 AbstractCegarLoop]: === Iteration 69 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:59,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:59,876 INFO L82 PathProgramCache]: Analyzing trace with hash -2073834836, now seen corresponding path program 27 times [2021-06-05 15:03:59,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:59,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793660435] [2021-06-05 15:03:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:59,967 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 15:03:59,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:59,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793660435] [2021-06-05 15:03:59,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793660435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:59,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903013479] [2021-06-05 15:03:59,967 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 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 15:04:00,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:04:00,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:00,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:00,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:00,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:00,129 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 15 treesize of output 19 [2021-06-05 15:04:00,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:00,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:00,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:00,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-05 15:04:00,225 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 15:04:00,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903013479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:00,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:00,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:04:00,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316768230] [2021-06-05 15:04:00,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:04:00,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:00,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:04:00,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:00,226 INFO L87 Difference]: Start difference. First operand 2389 states and 10285 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:00,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:00,773 INFO L93 Difference]: Finished difference Result 2608 states and 11019 transitions. [2021-06-05 15:04:00,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:04:00,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:00,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:00,779 INFO L225 Difference]: With dead ends: 2608 [2021-06-05 15:04:00,779 INFO L226 Difference]: Without dead ends: 2589 [2021-06-05 15:04:00,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:04:00,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-06-05 15:04:00,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2392. [2021-06-05 15:04:00,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 4.303638644918444) internal successors, (10290), 2391 states have internal predecessors, (10290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 10290 transitions. [2021-06-05 15:04:00,809 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 10290 transitions. Word has length 29 [2021-06-05 15:04:00,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:00,809 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 10290 transitions. [2021-06-05 15:04:00,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:00,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 10290 transitions. [2021-06-05 15:04:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:00,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:00,812 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] [2021-06-05 15:04:01,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 15:04:01,013 INFO L430 AbstractCegarLoop]: === Iteration 70 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:01,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:01,013 INFO L82 PathProgramCache]: Analyzing trace with hash -918912018, now seen corresponding path program 1 times [2021-06-05 15:04:01,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:01,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684661021] [2021-06-05 15:04:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:01,196 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 15:04:01,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:01,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684661021] [2021-06-05 15:04:01,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684661021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:01,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195267278] [2021-06-05 15:04:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:04:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:01,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:01,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:01,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:01,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:01,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:01,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:01,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-06-05 15:04:01,363 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 15:04:01,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195267278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:01,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:01,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 15:04:01,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536121456] [2021-06-05 15:04:01,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:04:01,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:01,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:04:01,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:01,364 INFO L87 Difference]: Start difference. First operand 2392 states and 10290 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:01,672 INFO L93 Difference]: Finished difference Result 2644 states and 11188 transitions. [2021-06-05 15:04:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:04:01,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:01,678 INFO L225 Difference]: With dead ends: 2644 [2021-06-05 15:04:01,678 INFO L226 Difference]: Without dead ends: 2625 [2021-06-05 15:04:01,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 346.4ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:01,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-06-05 15:04:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2494. [2021-06-05 15:04:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 4.292418772563177) internal successors, (10701), 2493 states have internal predecessors, (10701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 10701 transitions. [2021-06-05 15:04:01,712 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 10701 transitions. Word has length 29 [2021-06-05 15:04:01,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:01,712 INFO L482 AbstractCegarLoop]: Abstraction has 2494 states and 10701 transitions. [2021-06-05 15:04:01,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 10701 transitions. [2021-06-05 15:04:01,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:01,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:01,716 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] [2021-06-05 15:04:01,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:01,916 INFO L430 AbstractCegarLoop]: === Iteration 71 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:01,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:01,917 INFO L82 PathProgramCache]: Analyzing trace with hash -923682226, now seen corresponding path program 1 times [2021-06-05 15:04:01,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:01,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592641496] [2021-06-05 15:04:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:02,028 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 15:04:02,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:02,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592641496] [2021-06-05 15:04:02,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592641496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:02,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218028316] [2021-06-05 15:04:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:04:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:02,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:02,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:02,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:02,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:02,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:02,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:02,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-06-05 15:04:02,168 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 15:04:02,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218028316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:02,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:02,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 15:04:02,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695691053] [2021-06-05 15:04:02,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:04:02,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:02,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:04:02,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:04:02,169 INFO L87 Difference]: Start difference. First operand 2494 states and 10701 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 15:04:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:02,416 INFO L93 Difference]: Finished difference Result 2653 states and 11209 transitions. [2021-06-05 15:04:02,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:04:02,416 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 29 [2021-06-05 15:04:02,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:02,421 INFO L225 Difference]: With dead ends: 2653 [2021-06-05 15:04:02,421 INFO L226 Difference]: Without dead ends: 2634 [2021-06-05 15:04:02,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:02,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-06-05 15:04:02,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2496. [2021-06-05 15:04:02,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2495 states have (on average 4.292184368737475) internal successors, (10709), 2495 states have internal predecessors, (10709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:02,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 10709 transitions. [2021-06-05 15:04:02,451 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 10709 transitions. Word has length 29 [2021-06-05 15:04:02,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:02,451 INFO L482 AbstractCegarLoop]: Abstraction has 2496 states and 10709 transitions. [2021-06-05 15:04:02,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 15:04:02,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 10709 transitions. [2021-06-05 15:04:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:02,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:02,455 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] [2021-06-05 15:04:02,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:02,657 INFO L430 AbstractCegarLoop]: === Iteration 72 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:02,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:02,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1926683450, now seen corresponding path program 2 times [2021-06-05 15:04:02,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:02,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33533110] [2021-06-05 15:04:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:02,805 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 15:04:02,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:02,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33533110] [2021-06-05 15:04:02,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33533110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:02,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014894154] [2021-06-05 15:04:02,805 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 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 15:04:02,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:02,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:02,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:02,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:02,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:02,958 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:04:02,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:02,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:02,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:02,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 15:04:03,056 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 15:04:03,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014894154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:03,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:03,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:04:03,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769013558] [2021-06-05 15:04:03,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:04:03,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:03,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:04:03,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:04:03,057 INFO L87 Difference]: Start difference. First operand 2496 states and 10709 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:03,703 INFO L93 Difference]: Finished difference Result 2859 states and 12086 transitions. [2021-06-05 15:04:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:04:03,704 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:03,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:03,709 INFO L225 Difference]: With dead ends: 2859 [2021-06-05 15:04:03,709 INFO L226 Difference]: Without dead ends: 2840 [2021-06-05 15:04:03,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 579.4ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:04:03,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-06-05 15:04:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2526. [2021-06-05 15:04:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2526 states, 2525 states have (on average 4.295049504950495) internal successors, (10845), 2525 states have internal predecessors, (10845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2526 states to 2526 states and 10845 transitions. [2021-06-05 15:04:03,743 INFO L78 Accepts]: Start accepts. Automaton has 2526 states and 10845 transitions. Word has length 29 [2021-06-05 15:04:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:03,743 INFO L482 AbstractCegarLoop]: Abstraction has 2526 states and 10845 transitions. [2021-06-05 15:04:03,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2526 states and 10845 transitions. [2021-06-05 15:04:03,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:03,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:03,747 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] [2021-06-05 15:04:03,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:03,948 INFO L430 AbstractCegarLoop]: === Iteration 73 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:03,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:03,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1804686422, now seen corresponding path program 3 times [2021-06-05 15:04:03,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:03,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374175521] [2021-06-05 15:04:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:04,129 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 15:04:04,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:04,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374175521] [2021-06-05 15:04:04,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374175521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:04,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243158871] [2021-06-05 15:04:04,130 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 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 15:04:04,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:04:04,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:04,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:04,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:04,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:04,290 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 13 treesize of output 17 [2021-06-05 15:04:04,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:04,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:04,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:04,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 15:04:04,413 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 15:04:04,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243158871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:04,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:04,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:04:04,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808771394] [2021-06-05 15:04:04,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:04:04,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:04,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:04:04,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:04:04,414 INFO L87 Difference]: Start difference. First operand 2526 states and 10845 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:05,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:05,188 INFO L93 Difference]: Finished difference Result 3102 states and 12904 transitions. [2021-06-05 15:04:05,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:04:05,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:05,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:05,194 INFO L225 Difference]: With dead ends: 3102 [2021-06-05 15:04:05,194 INFO L226 Difference]: Without dead ends: 3064 [2021-06-05 15:04:05,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 725.6ms TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:04:05,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-06-05 15:04:05,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 2589. [2021-06-05 15:04:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2589 states, 2588 states have (on average 4.299459041731066) internal successors, (11127), 2588 states have internal predecessors, (11127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:05,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 11127 transitions. [2021-06-05 15:04:05,234 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 11127 transitions. Word has length 29 [2021-06-05 15:04:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:05,234 INFO L482 AbstractCegarLoop]: Abstraction has 2589 states and 11127 transitions. [2021-06-05 15:04:05,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 11127 transitions. [2021-06-05 15:04:05,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:05,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:05,238 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] [2021-06-05 15:04:05,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 15:04:05,441 INFO L430 AbstractCegarLoop]: === Iteration 74 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:05,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:05,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1433461416, now seen corresponding path program 4 times [2021-06-05 15:04:05,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:05,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221668650] [2021-06-05 15:04:05,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:05,617 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 15:04:05,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:05,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221668650] [2021-06-05 15:04:05,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221668650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:05,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928088585] [2021-06-05 15:04:05,617 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 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 15:04:05,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:05,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:05,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:05,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:05,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:05,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:05,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:05,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:05,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 15:04:05,788 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 15:04:05,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928088585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:05,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:05,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 15:04:05,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738766351] [2021-06-05 15:04:05,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:04:05,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:05,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:04:05,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:04:05,789 INFO L87 Difference]: Start difference. First operand 2589 states and 11127 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 15:04:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:06,088 INFO L93 Difference]: Finished difference Result 3136 states and 13219 transitions. [2021-06-05 15:04:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:04:06,088 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 29 [2021-06-05 15:04:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:06,095 INFO L225 Difference]: With dead ends: 3136 [2021-06-05 15:04:06,095 INFO L226 Difference]: Without dead ends: 3121 [2021-06-05 15:04:06,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 296.0ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:06,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-06-05 15:04:06,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2605. [2021-06-05 15:04:06,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2604 states have (on average 4.29147465437788) internal successors, (11175), 2604 states have internal predecessors, (11175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:06,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 11175 transitions. [2021-06-05 15:04:06,136 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 11175 transitions. Word has length 29 [2021-06-05 15:04:06,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:06,136 INFO L482 AbstractCegarLoop]: Abstraction has 2605 states and 11175 transitions. [2021-06-05 15:04:06,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 15:04:06,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 11175 transitions. [2021-06-05 15:04:06,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:06,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:06,139 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] [2021-06-05 15:04:06,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:06,341 INFO L430 AbstractCegarLoop]: === Iteration 75 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:06,341 INFO L82 PathProgramCache]: Analyzing trace with hash -234932026, now seen corresponding path program 5 times [2021-06-05 15:04:06,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:06,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245120741] [2021-06-05 15:04:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:06,500 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 15:04:06,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:06,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245120741] [2021-06-05 15:04:06,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245120741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:06,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220525354] [2021-06-05 15:04:06,501 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 15:04:06,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:06,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:06,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:06,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:06,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:06,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:06,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:06,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:06,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 15:04:06,644 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 15:04:06,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220525354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:06,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:06,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 15:04:06,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988755771] [2021-06-05 15:04:06,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:04:06,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:06,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:04:06,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:04:06,645 INFO L87 Difference]: Start difference. First operand 2605 states and 11175 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 15:04:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:06,964 INFO L93 Difference]: Finished difference Result 3149 states and 13269 transitions. [2021-06-05 15:04:06,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:04:06,965 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 29 [2021-06-05 15:04:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:06,971 INFO L225 Difference]: With dead ends: 3149 [2021-06-05 15:04:06,972 INFO L226 Difference]: Without dead ends: 3123 [2021-06-05 15:04:06,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 281.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:06,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-06-05 15:04:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 2510. [2021-06-05 15:04:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2510 states, 2509 states have (on average 4.302909525707453) internal successors, (10796), 2509 states have internal predecessors, (10796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:07,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 10796 transitions. [2021-06-05 15:04:07,010 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 10796 transitions. Word has length 29 [2021-06-05 15:04:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:07,010 INFO L482 AbstractCegarLoop]: Abstraction has 2510 states and 10796 transitions. [2021-06-05 15:04:07,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 15:04:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 10796 transitions. [2021-06-05 15:04:07,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:07,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:07,014 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] [2021-06-05 15:04:07,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:07,219 INFO L430 AbstractCegarLoop]: === Iteration 76 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:07,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:07,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1913873990, now seen corresponding path program 2 times [2021-06-05 15:04:07,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:07,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746440802] [2021-06-05 15:04:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:07,320 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 15:04:07,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:07,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746440802] [2021-06-05 15:04:07,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746440802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:07,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6095341] [2021-06-05 15:04:07,320 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 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 15:04:07,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:07,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:07,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:07,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:07,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:07,457 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 13 treesize of output 17 [2021-06-05 15:04:07,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:07,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:07,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:07,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 15:04:07,561 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 15:04:07,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6095341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:07,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:07,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:04:07,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705247496] [2021-06-05 15:04:07,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:04:07,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:07,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:04:07,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:07,563 INFO L87 Difference]: Start difference. First operand 2510 states and 10796 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:08,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:08,218 INFO L93 Difference]: Finished difference Result 3041 states and 12779 transitions. [2021-06-05 15:04:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:04:08,218 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:08,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:08,225 INFO L225 Difference]: With dead ends: 3041 [2021-06-05 15:04:08,225 INFO L226 Difference]: Without dead ends: 3022 [2021-06-05 15:04:08,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 560.9ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:04:08,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-06-05 15:04:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2540. [2021-06-05 15:04:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 4.301693580149665) internal successors, (10922), 2539 states have internal predecessors, (10922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 10922 transitions. [2021-06-05 15:04:08,285 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 10922 transitions. Word has length 29 [2021-06-05 15:04:08,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:08,285 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 10922 transitions. [2021-06-05 15:04:08,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:08,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 10922 transitions. [2021-06-05 15:04:08,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:08,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:08,289 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] [2021-06-05 15:04:08,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:08,489 INFO L430 AbstractCegarLoop]: === Iteration 77 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:08,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:08,489 INFO L82 PathProgramCache]: Analyzing trace with hash -364239170, now seen corresponding path program 3 times [2021-06-05 15:04:08,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:08,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249666723] [2021-06-05 15:04:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:08,582 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 15:04:08,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:08,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249666723] [2021-06-05 15:04:08,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249666723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:08,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488268674] [2021-06-05 15:04:08,583 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 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 15:04:08,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:04:08,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:08,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:08,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:08,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:08,706 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 13 treesize of output 17 [2021-06-05 15:04:08,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:08,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:08,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:08,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 15:04:08,807 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 15:04:08,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488268674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:08,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:08,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:04:08,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641622621] [2021-06-05 15:04:08,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:04:08,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:08,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:04:08,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:08,808 INFO L87 Difference]: Start difference. First operand 2540 states and 10922 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:09,447 INFO L93 Difference]: Finished difference Result 3595 states and 14868 transitions. [2021-06-05 15:04:09,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:09,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:09,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:09,455 INFO L225 Difference]: With dead ends: 3595 [2021-06-05 15:04:09,455 INFO L226 Difference]: Without dead ends: 3557 [2021-06-05 15:04:09,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 534.7ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:04:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-06-05 15:04:09,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2640. [2021-06-05 15:04:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 4.297082228116711) internal successors, (11340), 2639 states have internal predecessors, (11340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 11340 transitions. [2021-06-05 15:04:09,500 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 11340 transitions. Word has length 29 [2021-06-05 15:04:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:09,500 INFO L482 AbstractCegarLoop]: Abstraction has 2640 states and 11340 transitions. [2021-06-05 15:04:09,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:09,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 11340 transitions. [2021-06-05 15:04:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:09,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:09,504 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] [2021-06-05 15:04:09,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 15:04:09,705 INFO L430 AbstractCegarLoop]: === Iteration 78 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:09,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1058115656, now seen corresponding path program 4 times [2021-06-05 15:04:09,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:09,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442732164] [2021-06-05 15:04:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:09,807 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 15:04:09,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:09,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442732164] [2021-06-05 15:04:09,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442732164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:09,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095085976] [2021-06-05 15:04:09,807 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 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 15:04:09,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:09,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:09,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:09,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:09,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:09,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:09,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:09,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:09,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 15:04:09,941 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 15:04:09,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095085976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:09,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:09,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 15:04:09,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666696296] [2021-06-05 15:04:09,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:04:09,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:09,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:04:09,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:09,942 INFO L87 Difference]: Start difference. First operand 2640 states and 11340 transitions. Second operand has 12 states, 12 states have (on average 3.25) 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 15:04:10,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:10,173 INFO L93 Difference]: Finished difference Result 3227 states and 13608 transitions. [2021-06-05 15:04:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:04:10,174 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) 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 29 [2021-06-05 15:04:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:10,180 INFO L225 Difference]: With dead ends: 3227 [2021-06-05 15:04:10,180 INFO L226 Difference]: Without dead ends: 3196 [2021-06-05 15:04:10,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:10,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2021-06-05 15:04:10,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2492. [2021-06-05 15:04:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 2491 states have (on average 4.308711360899237) internal successors, (10733), 2491 states have internal predecessors, (10733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 10733 transitions. [2021-06-05 15:04:10,214 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 10733 transitions. Word has length 29 [2021-06-05 15:04:10,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:10,214 INFO L482 AbstractCegarLoop]: Abstraction has 2492 states and 10733 transitions. [2021-06-05 15:04:10,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) 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 15:04:10,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 10733 transitions. [2021-06-05 15:04:10,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:10,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:10,217 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] [2021-06-05 15:04:10,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:10,418 INFO L430 AbstractCegarLoop]: === Iteration 79 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:10,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:10,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1004214994, now seen corresponding path program 6 times [2021-06-05 15:04:10,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:10,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236018935] [2021-06-05 15:04:10,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:10,556 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 15:04:10,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:10,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236018935] [2021-06-05 15:04:10,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236018935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:10,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146133120] [2021-06-05 15:04:10,557 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 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 15:04:10,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:10,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:10,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:04:10,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:10,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:10,638 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 15:04:10,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:10,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:10,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:10,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 15:04:10,755 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 15:04:10,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146133120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:10,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:10,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:10,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90722458] [2021-06-05 15:04:10,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:10,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:10,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:10,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:10,756 INFO L87 Difference]: Start difference. First operand 2492 states and 10733 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:11,571 INFO L93 Difference]: Finished difference Result 3190 states and 13408 transitions. [2021-06-05 15:04:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:04:11,571 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:11,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:11,578 INFO L225 Difference]: With dead ends: 3190 [2021-06-05 15:04:11,578 INFO L226 Difference]: Without dead ends: 3171 [2021-06-05 15:04:11,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 703.1ms TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:04:11,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2021-06-05 15:04:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 2585. [2021-06-05 15:04:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 4.312693498452012) internal successors, (11144), 2584 states have internal predecessors, (11144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 11144 transitions. [2021-06-05 15:04:11,613 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 11144 transitions. Word has length 29 [2021-06-05 15:04:11,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:11,613 INFO L482 AbstractCegarLoop]: Abstraction has 2585 states and 11144 transitions. [2021-06-05 15:04:11,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:11,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 11144 transitions. [2021-06-05 15:04:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:11,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:11,617 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] [2021-06-05 15:04:11,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:11,818 INFO L430 AbstractCegarLoop]: === Iteration 80 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:11,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:11,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1987479696, now seen corresponding path program 7 times [2021-06-05 15:04:11,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:11,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586901946] [2021-06-05 15:04:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:11,950 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 15:04:11,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:11,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586901946] [2021-06-05 15:04:11,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586901946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:11,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255167040] [2021-06-05 15:04:11,950 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 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 15:04:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:11,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:12,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:12,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 15:04:12,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:12,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:12,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:12,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 15:04:12,092 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 15:04:12,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255167040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:12,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:12,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 15:04:12,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721878948] [2021-06-05 15:04:12,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:04:12,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:12,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:04:12,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:04:12,093 INFO L87 Difference]: Start difference. First operand 2585 states and 11144 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 15:04:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:12,279 INFO L93 Difference]: Finished difference Result 3052 states and 12852 transitions. [2021-06-05 15:04:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:04:12,280 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 29 [2021-06-05 15:04:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:12,286 INFO L225 Difference]: With dead ends: 3052 [2021-06-05 15:04:12,286 INFO L226 Difference]: Without dead ends: 3037 [2021-06-05 15:04:12,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:12,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-06-05 15:04:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2604. [2021-06-05 15:04:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2603 states have (on average 4.303111794083749) internal successors, (11201), 2603 states have internal predecessors, (11201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 11201 transitions. [2021-06-05 15:04:12,322 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 11201 transitions. Word has length 29 [2021-06-05 15:04:12,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:12,322 INFO L482 AbstractCegarLoop]: Abstraction has 2604 states and 11201 transitions. [2021-06-05 15:04:12,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 15:04:12,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 11201 transitions. [2021-06-05 15:04:12,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:12,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:12,326 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] [2021-06-05 15:04:12,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 15:04:12,527 INFO L430 AbstractCegarLoop]: === Iteration 81 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:12,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:12,527 INFO L82 PathProgramCache]: Analyzing trace with hash 639094158, now seen corresponding path program 8 times [2021-06-05 15:04:12,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:12,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719718055] [2021-06-05 15:04:12,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:12,667 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 15:04:12,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:12,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719718055] [2021-06-05 15:04:12,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719718055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:12,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851364635] [2021-06-05 15:04:12,667 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 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 15:04:12,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:12,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:12,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:12,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:12,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:12,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 15:04:12,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:12,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:12,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:12,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:04:12,915 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 15:04:12,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851364635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:12,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:12,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 15:04:12,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526620798] [2021-06-05 15:04:12,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:04:12,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:12,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:04:12,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:12,917 INFO L87 Difference]: Start difference. First operand 2604 states and 11201 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 15:04:13,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:13,526 INFO L93 Difference]: Finished difference Result 2956 states and 12436 transitions. [2021-06-05 15:04:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:13,527 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 29 [2021-06-05 15:04:13,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:13,532 INFO L225 Difference]: With dead ends: 2956 [2021-06-05 15:04:13,533 INFO L226 Difference]: Without dead ends: 2942 [2021-06-05 15:04:13,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 572.1ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:04:13,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-06-05 15:04:13,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2597. [2021-06-05 15:04:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 4.305469953775039) internal successors, (11177), 2596 states have internal predecessors, (11177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:13,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 11177 transitions. [2021-06-05 15:04:13,569 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 11177 transitions. Word has length 29 [2021-06-05 15:04:13,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:13,569 INFO L482 AbstractCegarLoop]: Abstraction has 2597 states and 11177 transitions. [2021-06-05 15:04:13,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 15:04:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 11177 transitions. [2021-06-05 15:04:13,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:13,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:13,573 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] [2021-06-05 15:04:13,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:13,773 INFO L430 AbstractCegarLoop]: === Iteration 82 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:13,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2040866216, now seen corresponding path program 9 times [2021-06-05 15:04:13,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:13,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057839666] [2021-06-05 15:04:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:13,924 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 15:04:13,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:13,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057839666] [2021-06-05 15:04:13,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057839666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:13,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243662789] [2021-06-05 15:04:13,924 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 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 15:04:13,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:13,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:13,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:04:13,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:14,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:14,023 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:04:14,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:14,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:14,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:14,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 15:04:14,129 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 15:04:14,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243662789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:14,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:14,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 15:04:14,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342131485] [2021-06-05 15:04:14,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:04:14,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:14,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:04:14,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:14,130 INFO L87 Difference]: Start difference. First operand 2597 states and 11177 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 15:04:14,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:14,624 INFO L93 Difference]: Finished difference Result 3119 states and 13036 transitions. [2021-06-05 15:04:14,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:04:14,625 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 29 [2021-06-05 15:04:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:14,631 INFO L225 Difference]: With dead ends: 3119 [2021-06-05 15:04:14,631 INFO L226 Difference]: Without dead ends: 3096 [2021-06-05 15:04:14,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 497.4ms TimeCoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:04:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-06-05 15:04:14,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2534. [2021-06-05 15:04:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 4.3024082116067905) internal successors, (10898), 2533 states have internal predecessors, (10898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:14,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 10898 transitions. [2021-06-05 15:04:14,669 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 10898 transitions. Word has length 29 [2021-06-05 15:04:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:14,670 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 10898 transitions. [2021-06-05 15:04:14,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 15:04:14,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 10898 transitions. [2021-06-05 15:04:14,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:14,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:14,674 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] [2021-06-05 15:04:14,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:14,874 INFO L430 AbstractCegarLoop]: === Iteration 83 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:14,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:14,874 INFO L82 PathProgramCache]: Analyzing trace with hash 548011288, now seen corresponding path program 10 times [2021-06-05 15:04:14,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:14,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632511704] [2021-06-05 15:04:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:15,008 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 15:04:15,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:15,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632511704] [2021-06-05 15:04:15,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632511704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:15,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347577028] [2021-06-05 15:04:15,008 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 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 15:04:15,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:15,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:15,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:15,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:15,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:15,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:15,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:15,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:15,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 15:04:15,178 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 15:04:15,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347577028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:15,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:15,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 15:04:15,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740027162] [2021-06-05 15:04:15,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:04:15,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:15,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:04:15,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:15,179 INFO L87 Difference]: Start difference. First operand 2534 states and 10898 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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 15:04:15,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:15,402 INFO L93 Difference]: Finished difference Result 2643 states and 11266 transitions. [2021-06-05 15:04:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:04:15,403 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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 29 [2021-06-05 15:04:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:15,408 INFO L225 Difference]: With dead ends: 2643 [2021-06-05 15:04:15,408 INFO L226 Difference]: Without dead ends: 2628 [2021-06-05 15:04:15,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 234.8ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:04:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-06-05 15:04:15,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2534. [2021-06-05 15:04:15,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 4.3024082116067905) internal successors, (10898), 2533 states have internal predecessors, (10898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 10898 transitions. [2021-06-05 15:04:15,445 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 10898 transitions. Word has length 29 [2021-06-05 15:04:15,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:15,445 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 10898 transitions. [2021-06-05 15:04:15,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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 15:04:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 10898 transitions. [2021-06-05 15:04:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:15,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:15,448 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] [2021-06-05 15:04:15,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:15,649 INFO L430 AbstractCegarLoop]: === Iteration 84 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:15,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1085301608, now seen corresponding path program 11 times [2021-06-05 15:04:15,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:15,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474033116] [2021-06-05 15:04:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:15,798 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 15:04:15,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:15,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474033116] [2021-06-05 15:04:15,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474033116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:15,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757235684] [2021-06-05 15:04:15,798 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 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 15:04:15,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:15,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:15,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:15,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:15,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:15,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:15,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:15,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:15,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 15:04:15,966 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 15:04:15,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757235684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:15,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:15,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 15:04:15,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114769292] [2021-06-05 15:04:15,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:04:15,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:15,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:04:15,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:04:15,967 INFO L87 Difference]: Start difference. First operand 2534 states and 10898 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 15:04:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:16,163 INFO L93 Difference]: Finished difference Result 2986 states and 12678 transitions. [2021-06-05 15:04:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:04:16,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 29 [2021-06-05 15:04:16,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:16,169 INFO L225 Difference]: With dead ends: 2986 [2021-06-05 15:04:16,169 INFO L226 Difference]: Without dead ends: 2972 [2021-06-05 15:04:16,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:16,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-06-05 15:04:16,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2522. [2021-06-05 15:04:16,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 4.308607695358985) internal successors, (10862), 2521 states have internal predecessors, (10862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 10862 transitions. [2021-06-05 15:04:16,201 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 10862 transitions. Word has length 29 [2021-06-05 15:04:16,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:16,201 INFO L482 AbstractCegarLoop]: Abstraction has 2522 states and 10862 transitions. [2021-06-05 15:04:16,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 15:04:16,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 10862 transitions. [2021-06-05 15:04:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:16,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:16,205 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] [2021-06-05 15:04:16,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:16,406 INFO L430 AbstractCegarLoop]: === Iteration 85 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:16,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:16,406 INFO L82 PathProgramCache]: Analyzing trace with hash -2051190826, now seen corresponding path program 12 times [2021-06-05 15:04:16,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:16,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959602091] [2021-06-05 15:04:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:16,543 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 15:04:16,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:16,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959602091] [2021-06-05 15:04:16,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959602091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:16,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397360462] [2021-06-05 15:04:16,543 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 15:04:16,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:04:16,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:16,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:16,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:16,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:16,673 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:04:16,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:16,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:16,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:16,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:04:16,806 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 15:04:16,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397360462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:16,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:16,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:04:16,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969968615] [2021-06-05 15:04:16,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:04:16,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:16,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:04:16,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:04:16,807 INFO L87 Difference]: Start difference. First operand 2522 states and 10862 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:17,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:17,666 INFO L93 Difference]: Finished difference Result 3049 states and 12765 transitions. [2021-06-05 15:04:17,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:04:17,666 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:17,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:17,672 INFO L225 Difference]: With dead ends: 3049 [2021-06-05 15:04:17,673 INFO L226 Difference]: Without dead ends: 3030 [2021-06-05 15:04:17,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 752.5ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:04:17,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-06-05 15:04:17,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2612. [2021-06-05 15:04:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2612 states, 2611 states have (on average 4.316353887399464) internal successors, (11270), 2611 states have internal predecessors, (11270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2612 states to 2612 states and 11270 transitions. [2021-06-05 15:04:17,711 INFO L78 Accepts]: Start accepts. Automaton has 2612 states and 11270 transitions. Word has length 29 [2021-06-05 15:04:17,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:17,712 INFO L482 AbstractCegarLoop]: Abstraction has 2612 states and 11270 transitions. [2021-06-05 15:04:17,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:17,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2612 states and 11270 transitions. [2021-06-05 15:04:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:17,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:17,716 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] [2021-06-05 15:04:17,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:17,916 INFO L430 AbstractCegarLoop]: === Iteration 86 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:17,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:17,917 INFO L82 PathProgramCache]: Analyzing trace with hash -747918220, now seen corresponding path program 13 times [2021-06-05 15:04:17,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:17,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351650893] [2021-06-05 15:04:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:18,046 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 15:04:18,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:18,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351650893] [2021-06-05 15:04:18,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351650893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:18,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373915802] [2021-06-05 15:04:18,047 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 15:04:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:18,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:18,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:18,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:18,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:18,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:18,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:18,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 15:04:18,184 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 15:04:18,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373915802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:18,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:18,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-06-05 15:04:18,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315702023] [2021-06-05 15:04:18,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:04:18,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:18,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:04:18,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:04:18,186 INFO L87 Difference]: Start difference. First operand 2612 states and 11270 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 15:04:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:18,400 INFO L93 Difference]: Finished difference Result 3082 states and 13050 transitions. [2021-06-05 15:04:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:04:18,400 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 29 [2021-06-05 15:04:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:18,406 INFO L225 Difference]: With dead ends: 3082 [2021-06-05 15:04:18,406 INFO L226 Difference]: Without dead ends: 3067 [2021-06-05 15:04:18,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:18,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2021-06-05 15:04:18,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2631. [2021-06-05 15:04:18,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2630 states have (on average 4.30722433460076) internal successors, (11328), 2630 states have internal predecessors, (11328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 11328 transitions. [2021-06-05 15:04:18,447 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 11328 transitions. Word has length 29 [2021-06-05 15:04:18,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:18,447 INFO L482 AbstractCegarLoop]: Abstraction has 2631 states and 11328 transitions. [2021-06-05 15:04:18,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 15:04:18,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 11328 transitions. [2021-06-05 15:04:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:18,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:18,451 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] [2021-06-05 15:04:18,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:18,652 INFO L430 AbstractCegarLoop]: === Iteration 87 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:18,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:18,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1878655634, now seen corresponding path program 14 times [2021-06-05 15:04:18,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:18,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106493913] [2021-06-05 15:04:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:18,840 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 15:04:18,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:18,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106493913] [2021-06-05 15:04:18,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106493913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:18,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830064217] [2021-06-05 15:04:18,841 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 15:04:18,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:18,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:18,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:18,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:18,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:18,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 15:04:18,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:18,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:18,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:18,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:04:19,056 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 15:04:19,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830064217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:19,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:19,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 15:04:19,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327047205] [2021-06-05 15:04:19,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:04:19,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:19,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:04:19,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:19,057 INFO L87 Difference]: Start difference. First operand 2631 states and 11328 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 15:04:19,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:19,760 INFO L93 Difference]: Finished difference Result 3044 states and 12758 transitions. [2021-06-05 15:04:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:04:19,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 29 [2021-06-05 15:04:19,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:19,766 INFO L225 Difference]: With dead ends: 3044 [2021-06-05 15:04:19,766 INFO L226 Difference]: Without dead ends: 3030 [2021-06-05 15:04:19,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 633.7ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:04:19,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-06-05 15:04:19,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2624. [2021-06-05 15:04:19,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 4.309569195577583) internal successors, (11304), 2623 states have internal predecessors, (11304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 11304 transitions. [2021-06-05 15:04:19,804 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 11304 transitions. Word has length 29 [2021-06-05 15:04:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:19,804 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 11304 transitions. [2021-06-05 15:04:19,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 15:04:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 11304 transitions. [2021-06-05 15:04:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:19,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:19,808 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] [2021-06-05 15:04:20,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 15:04:20,008 INFO L430 AbstractCegarLoop]: === Iteration 88 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:20,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:20,008 INFO L82 PathProgramCache]: Analyzing trace with hash -801304740, now seen corresponding path program 15 times [2021-06-05 15:04:20,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:20,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132264022] [2021-06-05 15:04:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:20,161 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 15:04:20,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:20,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132264022] [2021-06-05 15:04:20,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132264022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:20,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334114094] [2021-06-05 15:04:20,162 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 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 15:04:20,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:04:20,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:20,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:20,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:20,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:20,255 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 15:04:20,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:20,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:20,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:20,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:04:20,369 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 15:04:20,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334114094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:20,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:20,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 15:04:20,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459401981] [2021-06-05 15:04:20,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:04:20,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:20,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:04:20,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:20,370 INFO L87 Difference]: Start difference. First operand 2624 states and 11304 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 15:04:20,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:20,947 INFO L93 Difference]: Finished difference Result 3012 states and 12687 transitions. [2021-06-05 15:04:20,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:04:20,947 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 29 [2021-06-05 15:04:20,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:20,954 INFO L225 Difference]: With dead ends: 3012 [2021-06-05 15:04:20,954 INFO L226 Difference]: Without dead ends: 2989 [2021-06-05 15:04:20,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 548.7ms TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:04:20,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2021-06-05 15:04:20,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2552. [2021-06-05 15:04:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 4.31125049000392) internal successors, (10998), 2551 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 10998 transitions. [2021-06-05 15:04:20,987 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 10998 transitions. Word has length 29 [2021-06-05 15:04:20,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:20,987 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 10998 transitions. [2021-06-05 15:04:20,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 15:04:20,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 10998 transitions. [2021-06-05 15:04:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:20,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:20,991 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, 1, 1, 1] [2021-06-05 15:04:21,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:21,192 INFO L430 AbstractCegarLoop]: === Iteration 89 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:21,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:21,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1337845358, now seen corresponding path program 16 times [2021-06-05 15:04:21,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:21,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231795360] [2021-06-05 15:04:21,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:21,323 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 15:04:21,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:21,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231795360] [2021-06-05 15:04:21,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231795360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:21,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789395194] [2021-06-05 15:04:21,323 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 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 15:04:21,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:21,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:21,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:21,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:21,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:21,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:21,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:21,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:21,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 15:04:21,487 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 15:04:21,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789395194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:21,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:21,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 15:04:21,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54197912] [2021-06-05 15:04:21,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:04:21,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:21,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:04:21,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:21,488 INFO L87 Difference]: Start difference. First operand 2552 states and 10998 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:21,735 INFO L93 Difference]: Finished difference Result 2687 states and 11479 transitions. [2021-06-05 15:04:21,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:04:21,735 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:21,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:21,741 INFO L225 Difference]: With dead ends: 2687 [2021-06-05 15:04:21,741 INFO L226 Difference]: Without dead ends: 2668 [2021-06-05 15:04:21,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:04:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2021-06-05 15:04:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2552. [2021-06-05 15:04:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 4.31125049000392) internal successors, (10998), 2551 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:21,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 10998 transitions. [2021-06-05 15:04:21,779 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 10998 transitions. Word has length 29 [2021-06-05 15:04:21,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:21,779 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 10998 transitions. [2021-06-05 15:04:21,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:21,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 10998 transitions. [2021-06-05 15:04:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:21,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:21,783 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] [2021-06-05 15:04:21,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 15:04:21,983 INFO L430 AbstractCegarLoop]: === Iteration 90 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:21,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:21,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1901442782, now seen corresponding path program 17 times [2021-06-05 15:04:21,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:21,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696615159] [2021-06-05 15:04:21,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:22,167 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 15:04:22,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:22,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696615159] [2021-06-05 15:04:22,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696615159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:22,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907402231] [2021-06-05 15:04:22,167 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 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 15:04:22,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:22,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:22,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:22,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:22,251 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 15:04:22,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:22,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:22,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:22,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:19 [2021-06-05 15:04:22,351 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 15:04:22,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907402231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:22,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:22,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 15:04:22,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130683403] [2021-06-05 15:04:22,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:04:22,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:22,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:04:22,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:22,352 INFO L87 Difference]: Start difference. First operand 2552 states and 10998 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:22,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:22,553 INFO L93 Difference]: Finished difference Result 3039 states and 12853 transitions. [2021-06-05 15:04:22,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:04:22,553 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:22,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:22,560 INFO L225 Difference]: With dead ends: 3039 [2021-06-05 15:04:22,560 INFO L226 Difference]: Without dead ends: 3016 [2021-06-05 15:04:22,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:22,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2021-06-05 15:04:22,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 2522. [2021-06-05 15:04:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 4.308607695358985) internal successors, (10862), 2521 states have internal predecessors, (10862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 10862 transitions. [2021-06-05 15:04:22,597 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 10862 transitions. Word has length 29 [2021-06-05 15:04:22,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:22,597 INFO L482 AbstractCegarLoop]: Abstraction has 2522 states and 10862 transitions. [2021-06-05 15:04:22,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:22,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 10862 transitions. [2021-06-05 15:04:22,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:22,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:22,600 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, 1, 1, 1] [2021-06-05 15:04:22,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 15:04:22,801 INFO L430 AbstractCegarLoop]: === Iteration 91 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:22,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:22,801 INFO L82 PathProgramCache]: Analyzing trace with hash -865854478, now seen corresponding path program 5 times [2021-06-05 15:04:22,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:22,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804421393] [2021-06-05 15:04:22,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:22,936 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 15:04:22,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:22,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804421393] [2021-06-05 15:04:22,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804421393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:22,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724981554] [2021-06-05 15:04:22,936 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 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 15:04:22,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:22,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:22,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:22,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:23,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:23,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:23,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:23,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:23,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 15:04:23,081 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 15:04:23,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724981554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:23,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:23,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 15:04:23,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522238749] [2021-06-05 15:04:23,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:04:23,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:23,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:04:23,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:04:23,083 INFO L87 Difference]: Start difference. First operand 2522 states and 10862 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) 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 15:04:23,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:23,348 INFO L93 Difference]: Finished difference Result 3129 states and 13232 transitions. [2021-06-05 15:04:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:04:23,348 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) 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 29 [2021-06-05 15:04:23,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:23,355 INFO L225 Difference]: With dead ends: 3129 [2021-06-05 15:04:23,355 INFO L226 Difference]: Without dead ends: 3110 [2021-06-05 15:04:23,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 258.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:04:23,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2021-06-05 15:04:23,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2661. [2021-06-05 15:04:23,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 4.300375939849624) internal successors, (11439), 2660 states have internal predecessors, (11439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 11439 transitions. [2021-06-05 15:04:23,397 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 11439 transitions. Word has length 29 [2021-06-05 15:04:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:23,397 INFO L482 AbstractCegarLoop]: Abstraction has 2661 states and 11439 transitions. [2021-06-05 15:04:23,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) 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 15:04:23,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 11439 transitions. [2021-06-05 15:04:23,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:23,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:23,401 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] [2021-06-05 15:04:23,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:23,602 INFO L430 AbstractCegarLoop]: === Iteration 92 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:23,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:23,602 INFO L82 PathProgramCache]: Analyzing trace with hash 556500348, now seen corresponding path program 6 times [2021-06-05 15:04:23,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:23,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886616122] [2021-06-05 15:04:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:23,728 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 15:04:23,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:23,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886616122] [2021-06-05 15:04:23,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886616122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:23,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482934959] [2021-06-05 15:04:23,729 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 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 15:04:23,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:23,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:23,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:04:23,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:23,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:23,809 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 15:04:23,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:23,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:23,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:23,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 15:04:23,947 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 15:04:23,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482934959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:23,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:23,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 15:04:23,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751589187] [2021-06-05 15:04:23,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:04:23,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:23,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:04:23,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:23,948 INFO L87 Difference]: Start difference. First operand 2661 states and 11439 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 15:04:24,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:24,431 INFO L93 Difference]: Finished difference Result 3480 states and 14546 transitions. [2021-06-05 15:04:24,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:04:24,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 29 [2021-06-05 15:04:24,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:24,438 INFO L225 Difference]: With dead ends: 3480 [2021-06-05 15:04:24,438 INFO L226 Difference]: Without dead ends: 3449 [2021-06-05 15:04:24,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 470.4ms TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:04:24,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states. [2021-06-05 15:04:24,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 2561. [2021-06-05 15:04:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 4.305078125) internal successors, (11021), 2560 states have internal predecessors, (11021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 11021 transitions. [2021-06-05 15:04:24,476 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 11021 transitions. Word has length 29 [2021-06-05 15:04:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:24,476 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 11021 transitions. [2021-06-05 15:04:24,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 15:04:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 11021 transitions. [2021-06-05 15:04:24,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:24,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:24,479 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] [2021-06-05 15:04:24,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:24,680 INFO L430 AbstractCegarLoop]: === Iteration 93 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:24,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:24,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2106272904, now seen corresponding path program 7 times [2021-06-05 15:04:24,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:24,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051379108] [2021-06-05 15:04:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:24,820 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 15:04:24,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:24,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051379108] [2021-06-05 15:04:24,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051379108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:24,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426039084] [2021-06-05 15:04:24,821 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 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 15:04:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:24,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:24,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:24,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:24,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:24,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:24,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:24,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 15:04:24,999 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 15:04:24,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426039084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:24,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:24,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:04:25,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146185430] [2021-06-05 15:04:25,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:04:25,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:25,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:04:25,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:04:25,000 INFO L87 Difference]: Start difference. First operand 2561 states and 11021 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 15:04:25,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:25,288 INFO L93 Difference]: Finished difference Result 2679 states and 11423 transitions. [2021-06-05 15:04:25,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:04:25,288 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 29 [2021-06-05 15:04:25,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:25,294 INFO L225 Difference]: With dead ends: 2679 [2021-06-05 15:04:25,294 INFO L226 Difference]: Without dead ends: 2664 [2021-06-05 15:04:25,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-06-05 15:04:25,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2537. [2021-06-05 15:04:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2536 states have (on average 4.306782334384858) internal successors, (10922), 2536 states have internal predecessors, (10922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 10922 transitions. [2021-06-05 15:04:25,333 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 10922 transitions. Word has length 29 [2021-06-05 15:04:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:25,333 INFO L482 AbstractCegarLoop]: Abstraction has 2537 states and 10922 transitions. [2021-06-05 15:04:25,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 15:04:25,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 10922 transitions. [2021-06-05 15:04:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:25,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:25,337 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] [2021-06-05 15:04:25,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:25,537 INFO L430 AbstractCegarLoop]: === Iteration 94 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:25,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:25,538 INFO L82 PathProgramCache]: Analyzing trace with hash 382055414, now seen corresponding path program 8 times [2021-06-05 15:04:25,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:25,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500283105] [2021-06-05 15:04:25,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:25,689 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 15:04:25,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:25,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500283105] [2021-06-05 15:04:25,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500283105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:25,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680095154] [2021-06-05 15:04:25,689 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 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 15:04:25,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:25,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:25,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:25,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:25,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:25,779 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 15:04:25,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:25,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:25,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:25,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:04:25,916 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 15:04:25,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680095154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:25,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:25,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:04:25,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303037810] [2021-06-05 15:04:25,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:04:25,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:25,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:04:25,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:25,917 INFO L87 Difference]: Start difference. First operand 2537 states and 10922 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:26,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:26,923 INFO L93 Difference]: Finished difference Result 3319 states and 13757 transitions. [2021-06-05 15:04:26,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:04:26,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:26,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:26,930 INFO L225 Difference]: With dead ends: 3319 [2021-06-05 15:04:26,930 INFO L226 Difference]: Without dead ends: 3273 [2021-06-05 15:04:26,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 916.2ms TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:04:26,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-06-05 15:04:26,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2685. [2021-06-05 15:04:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2684 states have (on average 4.2831594634873325) internal successors, (11496), 2684 states have internal predecessors, (11496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 11496 transitions. [2021-06-05 15:04:26,976 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 11496 transitions. Word has length 29 [2021-06-05 15:04:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:26,976 INFO L482 AbstractCegarLoop]: Abstraction has 2685 states and 11496 transitions. [2021-06-05 15:04:26,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:26,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 11496 transitions. [2021-06-05 15:04:26,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:26,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:26,980 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] [2021-06-05 15:04:27,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 15:04:27,181 INFO L430 AbstractCegarLoop]: === Iteration 95 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1804410240, now seen corresponding path program 9 times [2021-06-05 15:04:27,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:27,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365801043] [2021-06-05 15:04:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:27,322 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 15:04:27,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:27,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365801043] [2021-06-05 15:04:27,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365801043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:27,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893389369] [2021-06-05 15:04:27,322 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 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 15:04:27,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:27,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:27,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:04:27,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:27,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:27,408 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 15:04:27,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:27,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:27,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:27,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 15:04:27,567 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 15:04:27,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893389369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:27,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:27,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 15:04:27,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97933059] [2021-06-05 15:04:27,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:04:27,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:27,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:04:27,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:27,568 INFO L87 Difference]: Start difference. First operand 2685 states and 11496 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 15:04:27,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:27,982 INFO L93 Difference]: Finished difference Result 3480 states and 14560 transitions. [2021-06-05 15:04:27,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:04:27,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 29 [2021-06-05 15:04:27,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:27,989 INFO L225 Difference]: With dead ends: 3480 [2021-06-05 15:04:27,989 INFO L226 Difference]: Without dead ends: 3407 [2021-06-05 15:04:27,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 469.6ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:04:27,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-06-05 15:04:28,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 2621. [2021-06-05 15:04:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2621 states, 2620 states have (on average 4.307251908396947) internal successors, (11285), 2620 states have internal predecessors, (11285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 11285 transitions. [2021-06-05 15:04:28,032 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 11285 transitions. Word has length 29 [2021-06-05 15:04:28,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:28,032 INFO L482 AbstractCegarLoop]: Abstraction has 2621 states and 11285 transitions. [2021-06-05 15:04:28,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 15:04:28,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 11285 transitions. [2021-06-05 15:04:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:28,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:28,036 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] [2021-06-05 15:04:28,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:28,237 INFO L430 AbstractCegarLoop]: === Iteration 96 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:28,237 INFO L82 PathProgramCache]: Analyzing trace with hash 220727986, now seen corresponding path program 10 times [2021-06-05 15:04:28,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:28,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410543749] [2021-06-05 15:04:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:28,364 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 15:04:28,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:28,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410543749] [2021-06-05 15:04:28,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410543749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:28,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567548834] [2021-06-05 15:04:28,364 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 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 15:04:28,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:28,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:28,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:28,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:28,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:04:28,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:28,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:28,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:28,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 15:04:28,499 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 15:04:28,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567548834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:28,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:28,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 15:04:28,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370090430] [2021-06-05 15:04:28,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:04:28,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:28,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:04:28,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:28,500 INFO L87 Difference]: Start difference. First operand 2621 states and 11285 transitions. Second operand has 12 states, 12 states have (on average 3.25) 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 15:04:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:28,749 INFO L93 Difference]: Finished difference Result 2765 states and 11775 transitions. [2021-06-05 15:04:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:04:28,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) 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 29 [2021-06-05 15:04:28,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:28,754 INFO L225 Difference]: With dead ends: 2765 [2021-06-05 15:04:28,755 INFO L226 Difference]: Without dead ends: 2746 [2021-06-05 15:04:28,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:28,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-06-05 15:04:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2618. [2021-06-05 15:04:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2617 states have (on average 4.30875047764616) internal successors, (11276), 2617 states have internal predecessors, (11276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 11276 transitions. [2021-06-05 15:04:28,788 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 11276 transitions. Word has length 29 [2021-06-05 15:04:28,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:28,788 INFO L482 AbstractCegarLoop]: Abstraction has 2618 states and 11276 transitions. [2021-06-05 15:04:28,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) 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 15:04:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 11276 transitions. [2021-06-05 15:04:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:28,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:28,791 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] [2021-06-05 15:04:28,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 15:04:28,992 INFO L430 AbstractCegarLoop]: === Iteration 97 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:28,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1672937528, now seen corresponding path program 18 times [2021-06-05 15:04:28,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:28,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004228619] [2021-06-05 15:04:28,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:29,066 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 15:04:29,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:29,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004228619] [2021-06-05 15:04:29,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004228619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:29,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415397934] [2021-06-05 15:04:29,067 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 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 15:04:29,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:04:29,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:29,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:29,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:29,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:29,151 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 15:04:29,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:29,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:29,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:29,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:04:29,274 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 15:04:29,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415397934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:29,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:29,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:04:29,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463437087] [2021-06-05 15:04:29,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:04:29,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:29,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:04:29,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:29,275 INFO L87 Difference]: Start difference. First operand 2618 states and 11276 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:29,718 INFO L93 Difference]: Finished difference Result 3191 states and 13490 transitions. [2021-06-05 15:04:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:04:29,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:29,725 INFO L225 Difference]: With dead ends: 3191 [2021-06-05 15:04:29,725 INFO L226 Difference]: Without dead ends: 3172 [2021-06-05 15:04:29,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:04:29,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2021-06-05 15:04:29,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 2734. [2021-06-05 15:04:29,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2733 states have (on average 4.304427369191365) internal successors, (11764), 2733 states have internal predecessors, (11764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 11764 transitions. [2021-06-05 15:04:29,764 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 11764 transitions. Word has length 29 [2021-06-05 15:04:29,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:29,764 INFO L482 AbstractCegarLoop]: Abstraction has 2734 states and 11764 transitions. [2021-06-05 15:04:29,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:29,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 11764 transitions. [2021-06-05 15:04:29,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:29,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:29,768 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] [2021-06-05 15:04:29,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:29,969 INFO L430 AbstractCegarLoop]: === Iteration 98 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:29,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:29,969 INFO L82 PathProgramCache]: Analyzing trace with hash -369664922, now seen corresponding path program 19 times [2021-06-05 15:04:29,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:29,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118065040] [2021-06-05 15:04:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:30,054 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 15:04:30,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:30,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118065040] [2021-06-05 15:04:30,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118065040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:30,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583998689] [2021-06-05 15:04:30,055 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 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 15:04:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:30,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:30,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:30,125 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 15:04:30,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:30,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:30,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:30,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-06-05 15:04:30,291 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 15:04:30,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583998689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:30,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:30,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-06-05 15:04:30,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939973188] [2021-06-05 15:04:30,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:04:30,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:30,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:04:30,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:04:30,292 INFO L87 Difference]: Start difference. First operand 2734 states and 11764 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 15:04:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:30,533 INFO L93 Difference]: Finished difference Result 3116 states and 13133 transitions. [2021-06-05 15:04:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:04:30,534 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 29 [2021-06-05 15:04:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:30,540 INFO L225 Difference]: With dead ends: 3116 [2021-06-05 15:04:30,540 INFO L226 Difference]: Without dead ends: 3030 [2021-06-05 15:04:30,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:04:30,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-06-05 15:04:30,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2689. [2021-06-05 15:04:30,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2689 states, 2688 states have (on average 4.312127976190476) internal successors, (11591), 2688 states have internal predecessors, (11591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2689 states to 2689 states and 11591 transitions. [2021-06-05 15:04:30,578 INFO L78 Accepts]: Start accepts. Automaton has 2689 states and 11591 transitions. Word has length 29 [2021-06-05 15:04:30,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:30,578 INFO L482 AbstractCegarLoop]: Abstraction has 2689 states and 11591 transitions. [2021-06-05 15:04:30,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 15:04:30,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2689 states and 11591 transitions. [2021-06-05 15:04:30,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:30,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:30,582 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] [2021-06-05 15:04:30,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:30,782 INFO L430 AbstractCegarLoop]: === Iteration 99 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:30,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:30,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2129141234, now seen corresponding path program 20 times [2021-06-05 15:04:30,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:30,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95619452] [2021-06-05 15:04:30,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:30,867 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 15:04:30,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:30,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95619452] [2021-06-05 15:04:30,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95619452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:30,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805849126] [2021-06-05 15:04:30,867 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 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 15:04:30,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:30,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:30,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:30,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:30,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:30,976 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 15:04:30,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:30,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:30,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:30,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:04:31,122 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 15:04:31,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805849126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:31,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:31,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:04:31,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500257923] [2021-06-05 15:04:31,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:04:31,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:31,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:04:31,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:31,123 INFO L87 Difference]: Start difference. First operand 2689 states and 11591 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:31,670 INFO L93 Difference]: Finished difference Result 2856 states and 12151 transitions. [2021-06-05 15:04:31,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:04:31,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:31,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:31,676 INFO L225 Difference]: With dead ends: 2856 [2021-06-05 15:04:31,676 INFO L226 Difference]: Without dead ends: 2841 [2021-06-05 15:04:31,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 460.5ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:04:31,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-06-05 15:04:31,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2686. [2021-06-05 15:04:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 2685 states have (on average 4.313594040968343) internal successors, (11582), 2685 states have internal predecessors, (11582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 11582 transitions. [2021-06-05 15:04:31,712 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 11582 transitions. Word has length 29 [2021-06-05 15:04:31,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:31,713 INFO L482 AbstractCegarLoop]: Abstraction has 2686 states and 11582 transitions. [2021-06-05 15:04:31,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:31,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 11582 transitions. [2021-06-05 15:04:31,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:31,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:31,716 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] [2021-06-05 15:04:31,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 15:04:31,933 INFO L430 AbstractCegarLoop]: === Iteration 100 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:31,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:31,933 INFO L82 PathProgramCache]: Analyzing trace with hash -433376052, now seen corresponding path program 21 times [2021-06-05 15:04:31,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:31,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581431853] [2021-06-05 15:04:31,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:32,007 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 15:04:32,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:32,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581431853] [2021-06-05 15:04:32,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581431853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:32,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834685745] [2021-06-05 15:04:32,007 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 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 15:04:32,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:32,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:32,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:04:32,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:32,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:32,095 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 15:04:32,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:32,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:32,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:32,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 15:04:32,201 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 15:04:32,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834685745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:32,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:32,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 15:04:32,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013995175] [2021-06-05 15:04:32,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:04:32,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:32,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:04:32,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:32,202 INFO L87 Difference]: Start difference. First operand 2686 states and 11582 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:32,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:32,677 INFO L93 Difference]: Finished difference Result 3614 states and 15141 transitions. [2021-06-05 15:04:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:32,677 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:32,684 INFO L225 Difference]: With dead ends: 3614 [2021-06-05 15:04:32,684 INFO L226 Difference]: Without dead ends: 3595 [2021-06-05 15:04:32,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:04:32,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3595 states. [2021-06-05 15:04:32,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3595 to 2796. [2021-06-05 15:04:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 4.311985688729875) internal successors, (12052), 2795 states have internal predecessors, (12052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:32,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 12052 transitions. [2021-06-05 15:04:32,725 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 12052 transitions. Word has length 29 [2021-06-05 15:04:32,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:32,726 INFO L482 AbstractCegarLoop]: Abstraction has 2796 states and 12052 transitions. [2021-06-05 15:04:32,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:32,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 12052 transitions. [2021-06-05 15:04:32,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:32,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:32,729 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] [2021-06-05 15:04:32,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 15:04:32,930 INFO L430 AbstractCegarLoop]: === Iteration 101 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:32,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:32,930 INFO L82 PathProgramCache]: Analyzing trace with hash 869896554, now seen corresponding path program 22 times [2021-06-05 15:04:32,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:32,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188628432] [2021-06-05 15:04:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:33,036 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 15:04:33,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:33,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188628432] [2021-06-05 15:04:33,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188628432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:33,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244661076] [2021-06-05 15:04:33,037 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 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 15:04:33,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:33,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:33,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:33,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:33,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:33,094 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 15:04:33,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:33,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:33,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:33,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:24 [2021-06-05 15:04:33,192 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 15:04:33,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244661076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:33,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:33,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-06-05 15:04:33,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812053090] [2021-06-05 15:04:33,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:04:33,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:33,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:04:33,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:04:33,193 INFO L87 Difference]: Start difference. First operand 2796 states and 12052 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 15:04:33,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:33,404 INFO L93 Difference]: Finished difference Result 3190 states and 13473 transitions. [2021-06-05 15:04:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:04:33,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 29 [2021-06-05 15:04:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:33,410 INFO L225 Difference]: With dead ends: 3190 [2021-06-05 15:04:33,411 INFO L226 Difference]: Without dead ends: 3110 [2021-06-05 15:04:33,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:33,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2021-06-05 15:04:33,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2716. [2021-06-05 15:04:33,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 4.311602209944751) internal successors, (11706), 2715 states have internal predecessors, (11706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:33,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 11706 transitions. [2021-06-05 15:04:33,449 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 11706 transitions. Word has length 29 [2021-06-05 15:04:33,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:33,449 INFO L482 AbstractCegarLoop]: Abstraction has 2716 states and 11706 transitions. [2021-06-05 15:04:33,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 15:04:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 11706 transitions. [2021-06-05 15:04:33,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:33,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:33,453 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] [2021-06-05 15:04:33,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:33,653 INFO L430 AbstractCegarLoop]: === Iteration 102 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:33,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:33,653 INFO L82 PathProgramCache]: Analyzing trace with hash 279969416, now seen corresponding path program 23 times [2021-06-05 15:04:33,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:33,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044603710] [2021-06-05 15:04:33,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:33,732 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 15:04:33,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:33,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044603710] [2021-06-05 15:04:33,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044603710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:33,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258601449] [2021-06-05 15:04:33,733 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 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 15:04:33,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:33,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:33,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:33,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:33,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:33,803 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 15:04:33,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:33,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:33,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:33,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 15:04:33,845 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 15:04:33,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258601449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:33,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:33,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 15:04:33,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571910866] [2021-06-05 15:04:33,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:33,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:33,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:33,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:33,846 INFO L87 Difference]: Start difference. First operand 2716 states and 11706 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 15:04:34,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:34,014 INFO L93 Difference]: Finished difference Result 2845 states and 12158 transitions. [2021-06-05 15:04:34,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:04:34,015 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 29 [2021-06-05 15:04:34,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:34,022 INFO L225 Difference]: With dead ends: 2845 [2021-06-05 15:04:34,022 INFO L226 Difference]: Without dead ends: 2826 [2021-06-05 15:04:34,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:34,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-06-05 15:04:34,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2713. [2021-06-05 15:04:34,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 4.312684365781711) internal successors, (11696), 2712 states have internal predecessors, (11696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 11696 transitions. [2021-06-05 15:04:34,073 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 11696 transitions. Word has length 29 [2021-06-05 15:04:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:34,074 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 11696 transitions. [2021-06-05 15:04:34,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 15:04:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 11696 transitions. [2021-06-05 15:04:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:34,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:34,079 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] [2021-06-05 15:04:34,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 15:04:34,303 INFO L430 AbstractCegarLoop]: === Iteration 103 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:34,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:34,303 INFO L82 PathProgramCache]: Analyzing trace with hash 25278284, now seen corresponding path program 24 times [2021-06-05 15:04:34,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:34,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750758046] [2021-06-05 15:04:34,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:34,377 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 15:04:34,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:34,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750758046] [2021-06-05 15:04:34,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750758046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:34,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108764080] [2021-06-05 15:04:34,378 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 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 15:04:34,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:04:34,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:34,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:34,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:34,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:34,487 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 13 treesize of output 17 [2021-06-05 15:04:34,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:34,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:34,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:34,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 15:04:34,613 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 15:04:34,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108764080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:34,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:34,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:04:34,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054919229] [2021-06-05 15:04:34,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:04:34,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:34,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:04:34,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:34,614 INFO L87 Difference]: Start difference. First operand 2713 states and 11696 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:35,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:35,067 INFO L93 Difference]: Finished difference Result 3335 states and 14089 transitions. [2021-06-05 15:04:35,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:04:35,067 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:35,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:35,073 INFO L225 Difference]: With dead ends: 3335 [2021-06-05 15:04:35,074 INFO L226 Difference]: Without dead ends: 3316 [2021-06-05 15:04:35,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 372.7ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2021-06-05 15:04:35,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 2828. [2021-06-05 15:04:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 4.305624336752741) internal successors, (12172), 2827 states have internal predecessors, (12172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 12172 transitions. [2021-06-05 15:04:35,114 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 12172 transitions. Word has length 29 [2021-06-05 15:04:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:35,114 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 12172 transitions. [2021-06-05 15:04:35,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 12172 transitions. [2021-06-05 15:04:35,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:35,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:35,118 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] [2021-06-05 15:04:35,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 15:04:35,319 INFO L430 AbstractCegarLoop]: === Iteration 104 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:35,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:35,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1328550890, now seen corresponding path program 25 times [2021-06-05 15:04:35,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:35,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916956341] [2021-06-05 15:04:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:35,396 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 15:04:35,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:35,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916956341] [2021-06-05 15:04:35,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916956341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:35,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288113421] [2021-06-05 15:04:35,397 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 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 15:04:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:35,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:35,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:35,460 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 15:04:35,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:35,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:35,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:35,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:22 [2021-06-05 15:04:35,543 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 15:04:35,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288113421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:35,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:35,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-06-05 15:04:35,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424979488] [2021-06-05 15:04:35,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:04:35,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:35,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:04:35,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:35,544 INFO L87 Difference]: Start difference. First operand 2828 states and 12172 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 15:04:35,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:35,833 INFO L93 Difference]: Finished difference Result 3219 states and 13551 transitions. [2021-06-05 15:04:35,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:04:35,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 29 [2021-06-05 15:04:35,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:35,840 INFO L225 Difference]: With dead ends: 3219 [2021-06-05 15:04:35,840 INFO L226 Difference]: Without dead ends: 3133 [2021-06-05 15:04:35,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:35,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3133 states. [2021-06-05 15:04:35,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3133 to 2748. [2021-06-05 15:04:35,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 4.308336366945759) internal successors, (11835), 2747 states have internal predecessors, (11835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 11835 transitions. [2021-06-05 15:04:35,877 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 11835 transitions. Word has length 29 [2021-06-05 15:04:35,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:35,878 INFO L482 AbstractCegarLoop]: Abstraction has 2748 states and 11835 transitions. [2021-06-05 15:04:35,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 15:04:35,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 11835 transitions. [2021-06-05 15:04:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:35,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:35,882 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, 1, 1, 1] [2021-06-05 15:04:36,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 15:04:36,083 INFO L430 AbstractCegarLoop]: === Iteration 105 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:36,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:36,083 INFO L82 PathProgramCache]: Analyzing trace with hash -430925422, now seen corresponding path program 26 times [2021-06-05 15:04:36,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:36,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765371530] [2021-06-05 15:04:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:36,156 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 15:04:36,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:36,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765371530] [2021-06-05 15:04:36,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765371530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:36,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268398582] [2021-06-05 15:04:36,157 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 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 15:04:36,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:36,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:36,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:36,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:36,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:36,260 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 13 treesize of output 17 [2021-06-05 15:04:36,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:36,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:36,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:36,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 15:04:36,375 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 15:04:36,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268398582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:36,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:36,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:04:36,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911359789] [2021-06-05 15:04:36,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:04:36,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:36,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:04:36,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:36,376 INFO L87 Difference]: Start difference. First operand 2748 states and 11835 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:36,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:36,905 INFO L93 Difference]: Finished difference Result 2976 states and 12614 transitions. [2021-06-05 15:04:36,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:04:36,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:36,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:36,911 INFO L225 Difference]: With dead ends: 2976 [2021-06-05 15:04:36,911 INFO L226 Difference]: Without dead ends: 2961 [2021-06-05 15:04:36,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 445.2ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:04:36,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-06-05 15:04:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2724. [2021-06-05 15:04:36,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 4.3088505325009185) internal successors, (11733), 2723 states have internal predecessors, (11733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:36,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 11733 transitions. [2021-06-05 15:04:36,950 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 11733 transitions. Word has length 29 [2021-06-05 15:04:36,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:36,950 INFO L482 AbstractCegarLoop]: Abstraction has 2724 states and 11733 transitions. [2021-06-05 15:04:36,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:36,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 11733 transitions. [2021-06-05 15:04:36,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:36,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:36,954 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] [2021-06-05 15:04:37,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:37,155 INFO L430 AbstractCegarLoop]: === Iteration 106 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:37,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:37,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1138592478, now seen corresponding path program 27 times [2021-06-05 15:04:37,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:37,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149137876] [2021-06-05 15:04:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:37,246 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 15:04:37,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:37,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149137876] [2021-06-05 15:04:37,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149137876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:37,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048059506] [2021-06-05 15:04:37,246 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 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 15:04:37,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:04:37,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:37,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:37,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:37,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:37,391 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 15 treesize of output 19 [2021-06-05 15:04:37,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:37,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:37,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:37,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-05 15:04:37,470 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 15:04:37,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048059506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:37,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:37,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:04:37,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379114484] [2021-06-05 15:04:37,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:04:37,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:37,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:04:37,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:37,471 INFO L87 Difference]: Start difference. First operand 2724 states and 11733 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:37,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:37,813 INFO L93 Difference]: Finished difference Result 2863 states and 12191 transitions. [2021-06-05 15:04:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:04:37,813 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:37,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:37,819 INFO L225 Difference]: With dead ends: 2863 [2021-06-05 15:04:37,820 INFO L226 Difference]: Without dead ends: 2848 [2021-06-05 15:04:37,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:37,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-06-05 15:04:37,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 2732. [2021-06-05 15:04:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 4.304284145001831) internal successors, (11755), 2731 states have internal predecessors, (11755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:37,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 11755 transitions. [2021-06-05 15:04:37,859 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 11755 transitions. Word has length 29 [2021-06-05 15:04:37,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:37,859 INFO L482 AbstractCegarLoop]: Abstraction has 2732 states and 11755 transitions. [2021-06-05 15:04:37,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:37,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 11755 transitions. [2021-06-05 15:04:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:37,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:37,863 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] [2021-06-05 15:04:38,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 15:04:38,069 INFO L430 AbstractCegarLoop]: === Iteration 107 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:38,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:38,069 INFO L82 PathProgramCache]: Analyzing trace with hash -324196480, now seen corresponding path program 11 times [2021-06-05 15:04:38,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:38,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320750945] [2021-06-05 15:04:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:38,265 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 15:04:38,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:38,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320750945] [2021-06-05 15:04:38,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320750945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:38,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787049968] [2021-06-05 15:04:38,265 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 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 15:04:38,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:38,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:38,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:38,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:38,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:38,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:38,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:38,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:38,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 15:04:38,478 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 15:04:38,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787049968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:38,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:38,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 15:04:38,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40594103] [2021-06-05 15:04:38,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:04:38,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:38,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:04:38,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:04:38,479 INFO L87 Difference]: Start difference. First operand 2732 states and 11755 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) 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 15:04:38,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:38,778 INFO L93 Difference]: Finished difference Result 3429 states and 14478 transitions. [2021-06-05 15:04:38,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:04:38,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) 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 29 [2021-06-05 15:04:38,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:38,786 INFO L225 Difference]: With dead ends: 3429 [2021-06-05 15:04:38,786 INFO L226 Difference]: Without dead ends: 3410 [2021-06-05 15:04:38,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:38,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-06-05 15:04:38,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 2875. [2021-06-05 15:04:38,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2875 states, 2874 states have (on average 4.293667362560891) internal successors, (12340), 2874 states have internal predecessors, (12340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:38,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 12340 transitions. [2021-06-05 15:04:38,826 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 12340 transitions. Word has length 29 [2021-06-05 15:04:38,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:38,826 INFO L482 AbstractCegarLoop]: Abstraction has 2875 states and 12340 transitions. [2021-06-05 15:04:38,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) 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 15:04:38,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 12340 transitions. [2021-06-05 15:04:38,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:38,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:38,837 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] [2021-06-05 15:04:39,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 15:04:39,057 INFO L430 AbstractCegarLoop]: === Iteration 108 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:39,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:39,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1098158346, now seen corresponding path program 12 times [2021-06-05 15:04:39,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:39,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519773940] [2021-06-05 15:04:39,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:39,183 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 15:04:39,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:39,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519773940] [2021-06-05 15:04:39,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519773940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:39,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615345403] [2021-06-05 15:04:39,184 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 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 15:04:39,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:04:39,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:39,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:39,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:39,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:39,301 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-05 15:04:39,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:39,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:39,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:39,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-06-05 15:04:39,399 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 15:04:39,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615345403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:39,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:39,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 15:04:39,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124147656] [2021-06-05 15:04:39,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:04:39,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:39,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:04:39,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:39,400 INFO L87 Difference]: Start difference. First operand 2875 states and 12340 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 15:04:40,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:40,126 INFO L93 Difference]: Finished difference Result 3488 states and 14640 transitions. [2021-06-05 15:04:40,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:40,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 29 [2021-06-05 15:04:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:40,133 INFO L225 Difference]: With dead ends: 3488 [2021-06-05 15:04:40,133 INFO L226 Difference]: Without dead ends: 3457 [2021-06-05 15:04:40,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 620.4ms TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:04:40,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2021-06-05 15:04:40,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 2787. [2021-06-05 15:04:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 4.299353912419239) internal successors, (11978), 2786 states have internal predecessors, (11978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 11978 transitions. [2021-06-05 15:04:40,173 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 11978 transitions. Word has length 29 [2021-06-05 15:04:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:40,174 INFO L482 AbstractCegarLoop]: Abstraction has 2787 states and 11978 transitions. [2021-06-05 15:04:40,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 15:04:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 11978 transitions. [2021-06-05 15:04:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:40,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:40,178 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, 1, 1, 1] [2021-06-05 15:04:40,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 15:04:40,378 INFO L430 AbstractCegarLoop]: === Iteration 109 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:40,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1564614906, now seen corresponding path program 13 times [2021-06-05 15:04:40,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:40,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356855427] [2021-06-05 15:04:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:40,492 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 15:04:40,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:40,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356855427] [2021-06-05 15:04:40,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356855427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:40,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705969632] [2021-06-05 15:04:40,492 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 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 15:04:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:40,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:40,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:40,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:40,578 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 13 treesize of output 7 [2021-06-05 15:04:40,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:40,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:40,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:40,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-06-05 15:04:40,646 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 15:04:40,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705969632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:40,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:40,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:04:40,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106392188] [2021-06-05 15:04:40,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:04:40,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:40,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:04:40,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:04:40,647 INFO L87 Difference]: Start difference. First operand 2787 states and 11978 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 15:04:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:40,916 INFO L93 Difference]: Finished difference Result 2978 states and 12650 transitions. [2021-06-05 15:04:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:04:40,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 29 [2021-06-05 15:04:40,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:40,922 INFO L225 Difference]: With dead ends: 2978 [2021-06-05 15:04:40,922 INFO L226 Difference]: Without dead ends: 2963 [2021-06-05 15:04:40,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:04:40,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2021-06-05 15:04:40,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2775. [2021-06-05 15:04:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 4.30281182408075) internal successors, (11936), 2774 states have internal predecessors, (11936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 11936 transitions. [2021-06-05 15:04:40,960 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 11936 transitions. Word has length 29 [2021-06-05 15:04:40,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:40,961 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 11936 transitions. [2021-06-05 15:04:40,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 15:04:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 11936 transitions. [2021-06-05 15:04:40,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:40,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:40,965 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] [2021-06-05 15:04:41,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:41,165 INFO L430 AbstractCegarLoop]: === Iteration 110 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:41,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:41,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1817023806, now seen corresponding path program 14 times [2021-06-05 15:04:41,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:41,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861154774] [2021-06-05 15:04:41,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:41,287 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 15:04:41,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:41,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861154774] [2021-06-05 15:04:41,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861154774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:41,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13537234] [2021-06-05 15:04:41,287 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 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 15:04:41,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:41,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:41,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:41,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:41,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:41,446 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 15 treesize of output 19 [2021-06-05 15:04:41,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:41,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:41,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:41,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-06-05 15:04:41,527 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 15:04:41,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13537234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:41,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:41,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:04:41,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846694378] [2021-06-05 15:04:41,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:04:41,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:41,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:04:41,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:41,528 INFO L87 Difference]: Start difference. First operand 2775 states and 11936 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:41,936 INFO L93 Difference]: Finished difference Result 2919 states and 12429 transitions. [2021-06-05 15:04:41,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:04:41,937 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:41,943 INFO L225 Difference]: With dead ends: 2919 [2021-06-05 15:04:41,943 INFO L226 Difference]: Without dead ends: 2904 [2021-06-05 15:04:41,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 381.2ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-06-05 15:04:41,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2765. [2021-06-05 15:04:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 2764 states have (on average 4.306801736613603) internal successors, (11904), 2764 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:41,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 11904 transitions. [2021-06-05 15:04:41,992 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 11904 transitions. Word has length 29 [2021-06-05 15:04:41,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:41,992 INFO L482 AbstractCegarLoop]: Abstraction has 2765 states and 11904 transitions. [2021-06-05 15:04:41,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:41,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 11904 transitions. [2021-06-05 15:04:41,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:41,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:41,997 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] [2021-06-05 15:04:42,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:42,197 INFO L430 AbstractCegarLoop]: === Iteration 111 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:42,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:42,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1349518276, now seen corresponding path program 15 times [2021-06-05 15:04:42,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:42,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743530516] [2021-06-05 15:04:42,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:42,357 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 15:04:42,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:42,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743530516] [2021-06-05 15:04:42,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743530516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:42,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475438055] [2021-06-05 15:04:42,357 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 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 15:04:42,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:04:42,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:42,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:42,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:42,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:42,441 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 15:04:42,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:42,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:42,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:42,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:04:42,581 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 15:04:42,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475438055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:42,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:42,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:04:42,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095281407] [2021-06-05 15:04:42,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:04:42,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:42,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:04:42,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:42,583 INFO L87 Difference]: Start difference. First operand 2765 states and 11904 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:43,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:43,705 INFO L93 Difference]: Finished difference Result 3739 states and 15661 transitions. [2021-06-05 15:04:43,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:04:43,706 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:43,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:43,713 INFO L225 Difference]: With dead ends: 3739 [2021-06-05 15:04:43,713 INFO L226 Difference]: Without dead ends: 3720 [2021-06-05 15:04:43,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 996.7ms TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:04:43,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2021-06-05 15:04:43,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 2904. [2021-06-05 15:04:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 4.300378918360317) internal successors, (12484), 2903 states have internal predecessors, (12484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 12484 transitions. [2021-06-05 15:04:43,763 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 12484 transitions. Word has length 29 [2021-06-05 15:04:43,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:43,763 INFO L482 AbstractCegarLoop]: Abstraction has 2904 states and 12484 transitions. [2021-06-05 15:04:43,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:43,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 12484 transitions. [2021-06-05 15:04:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:43,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:43,767 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, 1, 1, 1] [2021-06-05 15:04:43,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:43,968 INFO L430 AbstractCegarLoop]: === Iteration 112 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:43,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:43,968 INFO L82 PathProgramCache]: Analyzing trace with hash 72836550, now seen corresponding path program 16 times [2021-06-05 15:04:43,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:43,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685066219] [2021-06-05 15:04:43,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:44,125 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 15:04:44,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:44,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685066219] [2021-06-05 15:04:44,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685066219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:44,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240291010] [2021-06-05 15:04:44,126 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 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 15:04:44,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:44,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:44,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:44,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:44,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:44,195 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 13 treesize of output 7 [2021-06-05 15:04:44,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:44,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:44,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:44,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-06-05 15:04:44,265 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 15:04:44,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240291010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:44,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:44,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 15:04:44,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640473345] [2021-06-05 15:04:44,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:04:44,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:44,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:04:44,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:04:44,266 INFO L87 Difference]: Start difference. First operand 2904 states and 12484 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) 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 15:04:44,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:44,522 INFO L93 Difference]: Finished difference Result 3374 states and 14254 transitions. [2021-06-05 15:04:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:04:44,523 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) 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 29 [2021-06-05 15:04:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:44,530 INFO L225 Difference]: With dead ends: 3374 [2021-06-05 15:04:44,530 INFO L226 Difference]: Without dead ends: 3343 [2021-06-05 15:04:44,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 287.8ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:44,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2021-06-05 15:04:44,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 2804. [2021-06-05 15:04:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2803 states have (on average 4.30467356403853) internal successors, (12066), 2803 states have internal predecessors, (12066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 12066 transitions. [2021-06-05 15:04:44,570 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 12066 transitions. Word has length 29 [2021-06-05 15:04:44,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:44,570 INFO L482 AbstractCegarLoop]: Abstraction has 2804 states and 12066 transitions. [2021-06-05 15:04:44,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) 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 15:04:44,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 12066 transitions. [2021-06-05 15:04:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:44,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:44,574 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] [2021-06-05 15:04:44,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 15:04:44,774 INFO L430 AbstractCegarLoop]: === Iteration 113 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:44,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1705030594, now seen corresponding path program 17 times [2021-06-05 15:04:44,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:44,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967757171] [2021-06-05 15:04:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:44,902 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 15:04:44,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:44,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967757171] [2021-06-05 15:04:44,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967757171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:44,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377593079] [2021-06-05 15:04:44,903 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 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 15:04:44,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:44,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:44,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:44,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:44,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:44,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:44,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:44,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:44,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 15:04:45,058 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 15:04:45,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377593079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:45,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:45,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:04:45,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441703385] [2021-06-05 15:04:45,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:04:45,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:45,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:04:45,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:04:45,059 INFO L87 Difference]: Start difference. First operand 2804 states and 12066 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 15:04:45,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:45,305 INFO L93 Difference]: Finished difference Result 2926 states and 12487 transitions. [2021-06-05 15:04:45,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:04:45,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 29 [2021-06-05 15:04:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:45,311 INFO L225 Difference]: With dead ends: 2926 [2021-06-05 15:04:45,311 INFO L226 Difference]: Without dead ends: 2911 [2021-06-05 15:04:45,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:04:45,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-06-05 15:04:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2774. [2021-06-05 15:04:45,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 4.30580598629643) internal successors, (11940), 2773 states have internal predecessors, (11940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:45,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 11940 transitions. [2021-06-05 15:04:45,348 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 11940 transitions. Word has length 29 [2021-06-05 15:04:45,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:45,348 INFO L482 AbstractCegarLoop]: Abstraction has 2774 states and 11940 transitions. [2021-06-05 15:04:45,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 15:04:45,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 11940 transitions. [2021-06-05 15:04:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:45,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:45,352 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] [2021-06-05 15:04:45,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 15:04:45,553 INFO L430 AbstractCegarLoop]: === Iteration 114 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:45,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:45,553 INFO L82 PathProgramCache]: Analyzing trace with hash -101608384, now seen corresponding path program 18 times [2021-06-05 15:04:45,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:45,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022450551] [2021-06-05 15:04:45,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:45,698 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 15:04:45,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:45,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022450551] [2021-06-05 15:04:45,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022450551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:45,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709913286] [2021-06-05 15:04:45,698 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 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 15:04:45,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:04:45,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:45,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:45,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:45,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:45,780 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 15:04:45,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:45,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:45,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:45,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:04:45,912 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 15:04:45,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709913286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:45,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:45,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:04:45,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68495962] [2021-06-05 15:04:45,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:04:45,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:45,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:04:45,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:45,913 INFO L87 Difference]: Start difference. First operand 2774 states and 11940 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:46,894 INFO L93 Difference]: Finished difference Result 3811 states and 15865 transitions. [2021-06-05 15:04:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:04:46,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:04:46,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:46,902 INFO L225 Difference]: With dead ends: 3811 [2021-06-05 15:04:46,902 INFO L226 Difference]: Without dead ends: 3792 [2021-06-05 15:04:46,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 852.7ms TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:04:46,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2021-06-05 15:04:46,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 2904. [2021-06-05 15:04:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 4.299345504650362) internal successors, (12481), 2903 states have internal predecessors, (12481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 12481 transitions. [2021-06-05 15:04:46,947 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 12481 transitions. Word has length 29 [2021-06-05 15:04:46,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:46,947 INFO L482 AbstractCegarLoop]: Abstraction has 2904 states and 12481 transitions. [2021-06-05 15:04:46,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:46,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 12481 transitions. [2021-06-05 15:04:46,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:46,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:46,952 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] [2021-06-05 15:04:47,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 15:04:47,172 INFO L430 AbstractCegarLoop]: === Iteration 115 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:47,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1320746442, now seen corresponding path program 19 times [2021-06-05 15:04:47,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:47,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761547648] [2021-06-05 15:04:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:47,327 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 15:04:47,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:47,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761547648] [2021-06-05 15:04:47,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761547648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:47,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287259552] [2021-06-05 15:04:47,328 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 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 15:04:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:47,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:47,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:47,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:47,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:47,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:47,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:47,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-06-05 15:04:47,467 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 15:04:47,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287259552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:47,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:47,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 15:04:47,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811519215] [2021-06-05 15:04:47,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:04:47,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:47,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:04:47,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:04:47,468 INFO L87 Difference]: Start difference. First operand 2904 states and 12481 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) 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 15:04:47,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:47,694 INFO L93 Difference]: Finished difference Result 3369 states and 14236 transitions. [2021-06-05 15:04:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:04:47,694 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) 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 29 [2021-06-05 15:04:47,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:47,701 INFO L225 Difference]: With dead ends: 3369 [2021-06-05 15:04:47,701 INFO L226 Difference]: Without dead ends: 3338 [2021-06-05 15:04:47,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:47,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-06-05 15:04:47,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2804. [2021-06-05 15:04:47,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2803 states have (on average 4.3036032821976455) internal successors, (12063), 2803 states have internal predecessors, (12063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 12063 transitions. [2021-06-05 15:04:47,740 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 12063 transitions. Word has length 29 [2021-06-05 15:04:47,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:47,740 INFO L482 AbstractCegarLoop]: Abstraction has 2804 states and 12063 transitions. [2021-06-05 15:04:47,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) 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 15:04:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 12063 transitions. [2021-06-05 15:04:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:04:47,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:47,744 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] [2021-06-05 15:04:47,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 15:04:47,945 INFO L430 AbstractCegarLoop]: === Iteration 116 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:47,945 INFO L82 PathProgramCache]: Analyzing trace with hash -262935812, now seen corresponding path program 20 times [2021-06-05 15:04:47,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:47,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824341934] [2021-06-05 15:04:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:48,082 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 15:04:48,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:48,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824341934] [2021-06-05 15:04:48,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824341934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:48,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461871052] [2021-06-05 15:04:48,082 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 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 15:04:48,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:48,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:48,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:48,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:48,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:48,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 15:04:48,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:48,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:48,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:48,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-06-05 15:04:48,248 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 15:04:48,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461871052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:48,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:48,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 15:04:48,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017751122] [2021-06-05 15:04:48,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:04:48,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:48,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:04:48,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:04:48,249 INFO L87 Difference]: Start difference. First operand 2804 states and 12063 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 15:04:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:48,523 INFO L93 Difference]: Finished difference Result 2918 states and 12429 transitions. [2021-06-05 15:04:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:04:48,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 29 [2021-06-05 15:04:48,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:48,529 INFO L225 Difference]: With dead ends: 2918 [2021-06-05 15:04:48,529 INFO L226 Difference]: Without dead ends: 2899 [2021-06-05 15:04:48,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-06-05 15:04:48,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2780. [2021-06-05 15:04:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2780 states, 2779 states have (on average 4.305145735876215) internal successors, (11964), 2779 states have internal predecessors, (11964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:48,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 11964 transitions. [2021-06-05 15:04:48,566 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 11964 transitions. Word has length 29 [2021-06-05 15:04:48,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:48,566 INFO L482 AbstractCegarLoop]: Abstraction has 2780 states and 11964 transitions. [2021-06-05 15:04:48,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 15:04:48,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 11964 transitions. [2021-06-05 15:04:48,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:04:48,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:48,570 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, 1] [2021-06-05 15:04:48,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 15:04:48,770 INFO L430 AbstractCegarLoop]: === Iteration 117 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:48,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:48,771 INFO L82 PathProgramCache]: Analyzing trace with hash -701780529, now seen corresponding path program 36 times [2021-06-05 15:04:48,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:48,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106335965] [2021-06-05 15:04:48,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:48,789 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 15:04:48,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:48,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106335965] [2021-06-05 15:04:48,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106335965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:48,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865369325] [2021-06-05 15:04:48,790 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 15:04:48,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:48,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:48,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:04:48,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:48,874 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 15:04:48,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865369325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:48,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:48,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-06-05 15:04:48,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084094915] [2021-06-05 15:04:48,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:04:48,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:48,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:04:48,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:04:48,875 INFO L87 Difference]: Start difference. First operand 2780 states and 11964 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 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 15:04:48,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:48,952 INFO L93 Difference]: Finished difference Result 4234 states and 17658 transitions. [2021-06-05 15:04:48,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:04:48,953 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 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 31 [2021-06-05 15:04:48,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:48,961 INFO L225 Difference]: With dead ends: 4234 [2021-06-05 15:04:48,961 INFO L226 Difference]: Without dead ends: 4155 [2021-06-05 15:04:48,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-05 15:04:49,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3739. [2021-06-05 15:04:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 4.313001605136437) internal successors, (16122), 3738 states have internal predecessors, (16122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 16122 transitions. [2021-06-05 15:04:49,016 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 16122 transitions. Word has length 31 [2021-06-05 15:04:49,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:49,016 INFO L482 AbstractCegarLoop]: Abstraction has 3739 states and 16122 transitions. [2021-06-05 15:04:49,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 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 15:04:49,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 16122 transitions. [2021-06-05 15:04:49,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:04:49,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:49,021 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, 1] [2021-06-05 15:04:49,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:49,222 INFO L430 AbstractCegarLoop]: === Iteration 118 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:49,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:49,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1736759473, now seen corresponding path program 37 times [2021-06-05 15:04:49,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:49,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762048038] [2021-06-05 15:04:49,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:49,241 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 15:04:49,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:49,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762048038] [2021-06-05 15:04:49,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762048038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:49,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196695605] [2021-06-05 15:04:49,241 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 15:04:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:49,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:49,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:49,344 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 15:04:49,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196695605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:49,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:49,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 15:04:49,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130892104] [2021-06-05 15:04:49,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:04:49,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:49,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:04:49,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:04:49,345 INFO L87 Difference]: Start difference. First operand 3739 states and 16122 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:49,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:49,431 INFO L93 Difference]: Finished difference Result 4841 states and 20069 transitions. [2021-06-05 15:04:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:04:49,432 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:04:49,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:49,444 INFO L225 Difference]: With dead ends: 4841 [2021-06-05 15:04:49,445 INFO L226 Difference]: Without dead ends: 4724 [2021-06-05 15:04:49,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:04:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4724 states. [2021-06-05 15:04:49,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4724 to 3848. [2021-06-05 15:04:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 3847 states have (on average 4.288536521965168) internal successors, (16498), 3847 states have internal predecessors, (16498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 16498 transitions. [2021-06-05 15:04:49,535 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 16498 transitions. Word has length 31 [2021-06-05 15:04:49,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:49,535 INFO L482 AbstractCegarLoop]: Abstraction has 3848 states and 16498 transitions. [2021-06-05 15:04:49,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:49,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 16498 transitions. [2021-06-05 15:04:49,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:04:49,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:49,543 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, 1] [2021-06-05 15:04:49,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 15:04:49,757 INFO L430 AbstractCegarLoop]: === Iteration 119 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:49,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:49,757 INFO L82 PathProgramCache]: Analyzing trace with hash -210326895, now seen corresponding path program 38 times [2021-06-05 15:04:49,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:49,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184515169] [2021-06-05 15:04:49,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:49,778 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 15:04:49,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:49,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184515169] [2021-06-05 15:04:49,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184515169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:49,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695361883] [2021-06-05 15:04:49,778 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 15:04:49,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:49,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:49,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:49,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:49,892 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 15:04:49,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695361883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:49,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:49,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 15:04:49,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32318464] [2021-06-05 15:04:49,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:04:49,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:49,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:04:49,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:04:49,893 INFO L87 Difference]: Start difference. First operand 3848 states and 16498 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:50,075 INFO L93 Difference]: Finished difference Result 6042 states and 24692 transitions. [2021-06-05 15:04:50,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:04:50,075 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:04:50,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:50,087 INFO L225 Difference]: With dead ends: 6042 [2021-06-05 15:04:50,087 INFO L226 Difference]: Without dead ends: 5723 [2021-06-05 15:04:50,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:04:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5723 states. [2021-06-05 15:04:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5723 to 4408. [2021-06-05 15:04:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4408 states, 4407 states have (on average 4.309507601542999) internal successors, (18992), 4407 states have internal predecessors, (18992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 18992 transitions. [2021-06-05 15:04:50,166 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 18992 transitions. Word has length 31 [2021-06-05 15:04:50,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:50,166 INFO L482 AbstractCegarLoop]: Abstraction has 4408 states and 18992 transitions. [2021-06-05 15:04:50,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 18992 transitions. [2021-06-05 15:04:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:04:50,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:50,173 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, 1] [2021-06-05 15:04:50,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:50,374 INFO L430 AbstractCegarLoop]: === Iteration 120 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:50,374 INFO L82 PathProgramCache]: Analyzing trace with hash -296650923, now seen corresponding path program 39 times [2021-06-05 15:04:50,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:50,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66111249] [2021-06-05 15:04:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:50,394 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 15:04:50,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:50,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66111249] [2021-06-05 15:04:50,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66111249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:50,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807466335] [2021-06-05 15:04:50,395 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 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 15:04:50,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:04:50,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:50,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:50,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:50,476 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 15:04:50,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807466335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:50,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:50,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 15:04:50,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187675002] [2021-06-05 15:04:50,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:04:50,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:50,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:04:50,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:04:50,477 INFO L87 Difference]: Start difference. First operand 4408 states and 18992 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:50,553 INFO L93 Difference]: Finished difference Result 5262 states and 22054 transitions. [2021-06-05 15:04:50,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:04:50,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:04:50,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:50,565 INFO L225 Difference]: With dead ends: 5262 [2021-06-05 15:04:50,565 INFO L226 Difference]: Without dead ends: 5190 [2021-06-05 15:04:50,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:50,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2021-06-05 15:04:50,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 4400. [2021-06-05 15:04:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4400 states, 4399 states have (on average 4.2798363264378265) internal successors, (18827), 4399 states have internal predecessors, (18827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4400 states to 4400 states and 18827 transitions. [2021-06-05 15:04:50,673 INFO L78 Accepts]: Start accepts. Automaton has 4400 states and 18827 transitions. Word has length 31 [2021-06-05 15:04:50,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:50,673 INFO L482 AbstractCegarLoop]: Abstraction has 4400 states and 18827 transitions. [2021-06-05 15:04:50,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,673 INFO L276 IsEmpty]: Start isEmpty. Operand 4400 states and 18827 transitions. [2021-06-05 15:04:50,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:04:50,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:50,680 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, 1] [2021-06-05 15:04:50,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:50,881 INFO L430 AbstractCegarLoop]: === Iteration 121 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:50,881 INFO L82 PathProgramCache]: Analyzing trace with hash 75547345, now seen corresponding path program 40 times [2021-06-05 15:04:50,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:50,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288357224] [2021-06-05 15:04:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:50,901 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 15:04:50,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:50,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288357224] [2021-06-05 15:04:50,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288357224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:50,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266907931] [2021-06-05 15:04:50,901 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 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 15:04:50,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:50,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:50,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:50,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:50,985 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 15:04:50,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266907931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:50,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:50,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-06-05 15:04:50,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891790858] [2021-06-05 15:04:50,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:04:50,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:50,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:04:50,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:04:50,986 INFO L87 Difference]: Start difference. First operand 4400 states and 18827 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:51,078 INFO L93 Difference]: Finished difference Result 7147 states and 29601 transitions. [2021-06-05 15:04:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:04:51,078 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:04:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:51,093 INFO L225 Difference]: With dead ends: 7147 [2021-06-05 15:04:51,093 INFO L226 Difference]: Without dead ends: 6921 [2021-06-05 15:04:51,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6921 states. [2021-06-05 15:04:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6921 to 5792. [2021-06-05 15:04:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5791 states have (on average 4.318425142462441) internal successors, (25008), 5791 states have internal predecessors, (25008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:51,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 25008 transitions. [2021-06-05 15:04:51,196 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 25008 transitions. Word has length 31 [2021-06-05 15:04:51,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:51,196 INFO L482 AbstractCegarLoop]: Abstraction has 5792 states and 25008 transitions. [2021-06-05 15:04:51,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:51,196 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 25008 transitions. [2021-06-05 15:04:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:04:51,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:51,205 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, 1] [2021-06-05 15:04:51,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-06-05 15:04:51,405 INFO L430 AbstractCegarLoop]: === Iteration 122 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:51,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash -205490181, now seen corresponding path program 41 times [2021-06-05 15:04:51,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:51,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292926709] [2021-06-05 15:04:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:51,425 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 15:04:51,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:51,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292926709] [2021-06-05 15:04:51,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292926709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:51,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020030032] [2021-06-05 15:04:51,425 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 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 15:04:51,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:51,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:51,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:51,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:51,521 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 15:04:51,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020030032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:51,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:51,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 15:04:51,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739182047] [2021-06-05 15:04:51,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:04:51,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:51,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:04:51,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:04:51,522 INFO L87 Difference]: Start difference. First operand 5792 states and 25008 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 15:04:51,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:51,611 INFO L93 Difference]: Finished difference Result 7511 states and 31291 transitions. [2021-06-05 15:04:51,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:04:51,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 31 [2021-06-05 15:04:51,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:51,627 INFO L225 Difference]: With dead ends: 7511 [2021-06-05 15:04:51,627 INFO L226 Difference]: Without dead ends: 7409 [2021-06-05 15:04:51,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:51,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7409 states. [2021-06-05 15:04:51,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7409 to 5656. [2021-06-05 15:04:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5656 states, 5655 states have (on average 4.315296198054819) internal successors, (24403), 5655 states have internal predecessors, (24403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:51,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5656 states to 5656 states and 24403 transitions. [2021-06-05 15:04:51,725 INFO L78 Accepts]: Start accepts. Automaton has 5656 states and 24403 transitions. Word has length 31 [2021-06-05 15:04:51,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:51,725 INFO L482 AbstractCegarLoop]: Abstraction has 5656 states and 24403 transitions. [2021-06-05 15:04:51,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 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 15:04:51,725 INFO L276 IsEmpty]: Start isEmpty. Operand 5656 states and 24403 transitions. [2021-06-05 15:04:51,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:04:51,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:51,734 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, 1] [2021-06-05 15:04:51,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:51,935 INFO L430 AbstractCegarLoop]: === Iteration 123 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:51,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:51,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1507309107, now seen corresponding path program 42 times [2021-06-05 15:04:51,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:51,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347510946] [2021-06-05 15:04:51,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:51,956 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 15:04:51,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:51,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347510946] [2021-06-05 15:04:51,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347510946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:51,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536278893] [2021-06-05 15:04:51,956 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 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 15:04:52,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:52,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:52,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:52,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:52,043 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 15:04:52,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536278893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:52,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:52,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 15:04:52,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776898575] [2021-06-05 15:04:52,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:04:52,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:52,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:04:52,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:04:52,044 INFO L87 Difference]: Start difference. First operand 5656 states and 24403 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 15:04:52,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:52,133 INFO L93 Difference]: Finished difference Result 7291 states and 30390 transitions. [2021-06-05 15:04:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:04:52,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 31 [2021-06-05 15:04:52,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:52,149 INFO L225 Difference]: With dead ends: 7291 [2021-06-05 15:04:52,150 INFO L226 Difference]: Without dead ends: 7213 [2021-06-05 15:04:52,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:04:52,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2021-06-05 15:04:52,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 6069. [2021-06-05 15:04:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6069 states, 6068 states have (on average 4.318226763348714) internal successors, (26203), 6068 states have internal predecessors, (26203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 26203 transitions. [2021-06-05 15:04:52,260 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 26203 transitions. Word has length 31 [2021-06-05 15:04:52,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:52,260 INFO L482 AbstractCegarLoop]: Abstraction has 6069 states and 26203 transitions. [2021-06-05 15:04:52,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 15:04:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 26203 transitions. [2021-06-05 15:04:52,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:04:52,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:52,270 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, 1] [2021-06-05 15:04:52,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:52,471 INFO L430 AbstractCegarLoop]: === Iteration 124 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:52,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:52,471 INFO L82 PathProgramCache]: Analyzing trace with hash 562379733, now seen corresponding path program 43 times [2021-06-05 15:04:52,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:52,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426692213] [2021-06-05 15:04:52,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:52,489 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 15:04:52,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:52,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426692213] [2021-06-05 15:04:52,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426692213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:52,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580550784] [2021-06-05 15:04:52,489 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 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 15:04:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:52,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:52,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:52,580 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 15:04:52,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580550784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:52,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:52,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 15:04:52,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707403750] [2021-06-05 15:04:52,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:52,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:52,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:52,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:52,581 INFO L87 Difference]: Start difference. First operand 6069 states and 26203 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:52,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:52,685 INFO L93 Difference]: Finished difference Result 8199 states and 34127 transitions. [2021-06-05 15:04:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:04:52,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:04:52,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:52,703 INFO L225 Difference]: With dead ends: 8199 [2021-06-05 15:04:52,703 INFO L226 Difference]: Without dead ends: 7998 [2021-06-05 15:04:52,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:04:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7998 states. [2021-06-05 15:04:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7998 to 5836. [2021-06-05 15:04:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5836 states, 5835 states have (on average 4.310025706940874) internal successors, (25149), 5835 states have internal predecessors, (25149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:52,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5836 states to 5836 states and 25149 transitions. [2021-06-05 15:04:52,826 INFO L78 Accepts]: Start accepts. Automaton has 5836 states and 25149 transitions. Word has length 31 [2021-06-05 15:04:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:52,826 INFO L482 AbstractCegarLoop]: Abstraction has 5836 states and 25149 transitions. [2021-06-05 15:04:52,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:52,827 INFO L276 IsEmpty]: Start isEmpty. Operand 5836 states and 25149 transitions. [2021-06-05 15:04:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:04:52,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:52,836 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, 1, 1, 1] [2021-06-05 15:04:53,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 15:04:53,036 INFO L430 AbstractCegarLoop]: === Iteration 125 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:53,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:53,036 INFO L82 PathProgramCache]: Analyzing trace with hash 236625456, now seen corresponding path program 44 times [2021-06-05 15:04:53,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:53,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223438653] [2021-06-05 15:04:53,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:53,274 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 15:04:53,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:53,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223438653] [2021-06-05 15:04:53,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223438653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:53,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313263947] [2021-06-05 15:04:53,274 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 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 15:04:53,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:53,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:53,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:04:53,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:53,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:53,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:53,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:53,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:53,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:53,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:04:53,728 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 15:04:53,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313263947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:53,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:53,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:04:53,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200026322] [2021-06-05 15:04:53,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:04:53,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:53,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:04:53,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:04:53,729 INFO L87 Difference]: Start difference. First operand 5836 states and 25149 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:55,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:55,002 INFO L93 Difference]: Finished difference Result 6478 states and 27684 transitions. [2021-06-05 15:04:55,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:04:55,002 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:04:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:55,020 INFO L225 Difference]: With dead ends: 6478 [2021-06-05 15:04:55,020 INFO L226 Difference]: Without dead ends: 6459 [2021-06-05 15:04:55,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1137.0ms TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:04:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6459 states. [2021-06-05 15:04:55,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6459 to 5939. [2021-06-05 15:04:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5938 states have (on average 4.303974402155608) internal successors, (25557), 5938 states have internal predecessors, (25557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 25557 transitions. [2021-06-05 15:04:55,117 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 25557 transitions. Word has length 33 [2021-06-05 15:04:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:55,117 INFO L482 AbstractCegarLoop]: Abstraction has 5939 states and 25557 transitions. [2021-06-05 15:04:55,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 25557 transitions. [2021-06-05 15:04:55,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:04:55,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:55,126 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, 1, 1, 1] [2021-06-05 15:04:55,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:55,327 INFO L430 AbstractCegarLoop]: === Iteration 126 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:55,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:55,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1982190470, now seen corresponding path program 45 times [2021-06-05 15:04:55,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:55,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676881112] [2021-06-05 15:04:55,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:55,532 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 15:04:55,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:55,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676881112] [2021-06-05 15:04:55,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676881112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:55,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066663435] [2021-06-05 15:04:55,532 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 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 15:04:55,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:55,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:55,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:04:55,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:55,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:55,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:55,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:55,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:55,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:55,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:04:56,058 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 15:04:56,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066663435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:56,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:56,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:04:56,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153616370] [2021-06-05 15:04:56,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:04:56,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:56,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:04:56,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:04:56,060 INFO L87 Difference]: Start difference. First operand 5939 states and 25557 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:57,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:57,362 INFO L93 Difference]: Finished difference Result 6497 states and 27746 transitions. [2021-06-05 15:04:57,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:04:57,362 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:04:57,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:57,377 INFO L225 Difference]: With dead ends: 6497 [2021-06-05 15:04:57,378 INFO L226 Difference]: Without dead ends: 6478 [2021-06-05 15:04:57,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1227.1ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:04:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6478 states. [2021-06-05 15:04:57,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6478 to 5942. [2021-06-05 15:04:57,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5942 states, 5941 states have (on average 4.303484261908769) internal successors, (25567), 5941 states have internal predecessors, (25567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5942 states to 5942 states and 25567 transitions. [2021-06-05 15:04:57,473 INFO L78 Accepts]: Start accepts. Automaton has 5942 states and 25567 transitions. Word has length 33 [2021-06-05 15:04:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:57,474 INFO L482 AbstractCegarLoop]: Abstraction has 5942 states and 25567 transitions. [2021-06-05 15:04:57,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:57,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5942 states and 25567 transitions. [2021-06-05 15:04:57,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:04:57,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:57,483 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, 1, 1, 1] [2021-06-05 15:04:57,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 15:04:57,684 INFO L430 AbstractCegarLoop]: === Iteration 127 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:57,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:57,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1861531658, now seen corresponding path program 46 times [2021-06-05 15:04:57,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:57,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420076165] [2021-06-05 15:04:57,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:57,867 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 15:04:57,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:57,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420076165] [2021-06-05 15:04:57,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420076165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:57,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92415298] [2021-06-05 15:04:57,867 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 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 15:04:57,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:57,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:57,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:04:57,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:58,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 15:04:58,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:58,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:58,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:58,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:04:58,175 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 15:04:58,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92415298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:58,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:58,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:04:58,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718958805] [2021-06-05 15:04:58,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:58,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:58,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:58,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:58,176 INFO L87 Difference]: Start difference. First operand 5942 states and 25567 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:59,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:59,565 INFO L93 Difference]: Finished difference Result 6457 states and 27475 transitions. [2021-06-05 15:04:59,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:04:59,565 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:04:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:59,581 INFO L225 Difference]: With dead ends: 6457 [2021-06-05 15:04:59,581 INFO L226 Difference]: Without dead ends: 6438 [2021-06-05 15:04:59,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1022.7ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:04:59,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2021-06-05 15:04:59,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 5990. [2021-06-05 15:04:59,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5990 states, 5989 states have (on average 4.307062948739356) internal successors, (25795), 5989 states have internal predecessors, (25795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 25795 transitions. [2021-06-05 15:04:59,723 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 25795 transitions. Word has length 33 [2021-06-05 15:04:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:59,723 INFO L482 AbstractCegarLoop]: Abstraction has 5990 states and 25795 transitions. [2021-06-05 15:04:59,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 25795 transitions. [2021-06-05 15:04:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:04:59,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:59,733 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, 1, 1, 1] [2021-06-05 15:04:59,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 15:04:59,937 INFO L430 AbstractCegarLoop]: === Iteration 128 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:59,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:59,937 INFO L82 PathProgramCache]: Analyzing trace with hash 278487964, now seen corresponding path program 47 times [2021-06-05 15:04:59,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:59,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996700743] [2021-06-05 15:04:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:00,131 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 15:05:00,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:00,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996700743] [2021-06-05 15:05:00,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996700743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:00,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923559432] [2021-06-05 15:05:00,132 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 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 15:05:00,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:05:00,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:00,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:00,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:00,353 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 15:05:00,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:00,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:00,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:00,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:05:00,439 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 15:05:00,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923559432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:00,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:00,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:05:00,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823796508] [2021-06-05 15:05:00,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:00,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:00,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:00,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:00,440 INFO L87 Difference]: Start difference. First operand 5990 states and 25795 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:01,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:01,962 INFO L93 Difference]: Finished difference Result 6603 states and 28103 transitions. [2021-06-05 15:05:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:05:01,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:01,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:01,982 INFO L225 Difference]: With dead ends: 6603 [2021-06-05 15:05:01,982 INFO L226 Difference]: Without dead ends: 6584 [2021-06-05 15:05:01,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1125.2ms TimeCoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:05:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6584 states. [2021-06-05 15:05:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6584 to 6014. [2021-06-05 15:05:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 6013 states have (on average 4.308165641110926) internal successors, (25905), 6013 states have internal predecessors, (25905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 25905 transitions. [2021-06-05 15:05:02,090 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 25905 transitions. Word has length 33 [2021-06-05 15:05:02,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:02,091 INFO L482 AbstractCegarLoop]: Abstraction has 6014 states and 25905 transitions. [2021-06-05 15:05:02,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:02,091 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 25905 transitions. [2021-06-05 15:05:02,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:02,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:02,101 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, 1, 1, 1] [2021-06-05 15:05:02,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 15:05:02,305 INFO L430 AbstractCegarLoop]: === Iteration 129 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:02,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:02,305 INFO L82 PathProgramCache]: Analyzing trace with hash -285109460, now seen corresponding path program 48 times [2021-06-05 15:05:02,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:02,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032434672] [2021-06-05 15:05:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:02,511 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 15:05:02,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:02,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032434672] [2021-06-05 15:05:02,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032434672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:02,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76070039] [2021-06-05 15:05:02,512 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 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 15:05:02,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:05:02,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:02,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:02,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:02,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:02,815 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:05:02,815 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 27 treesize of output 55 [2021-06-05 15:05:02,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:05:02,847 INFO L628 ElimStorePlain]: treesize reduction 43, result has 33.8 percent of original size [2021-06-05 15:05:02,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:02,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 15:05:03,062 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 15:05:03,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76070039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:03,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:03,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:05:03,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349244020] [2021-06-05 15:05:03,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:05:03,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:03,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:05:03,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:05:03,064 INFO L87 Difference]: Start difference. First operand 6014 states and 25905 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:04,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:04,638 INFO L93 Difference]: Finished difference Result 6445 states and 27477 transitions. [2021-06-05 15:05:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:05:04,638 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:04,653 INFO L225 Difference]: With dead ends: 6445 [2021-06-05 15:05:04,653 INFO L226 Difference]: Without dead ends: 6426 [2021-06-05 15:05:04,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1463.2ms TimeCoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:05:04,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6426 states. [2021-06-05 15:05:04,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6426 to 6024. [2021-06-05 15:05:04,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6024 states, 6023 states have (on average 4.307155902374232) internal successors, (25942), 6023 states have internal predecessors, (25942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:04,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 25942 transitions. [2021-06-05 15:05:04,756 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 25942 transitions. Word has length 33 [2021-06-05 15:05:04,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:04,756 INFO L482 AbstractCegarLoop]: Abstraction has 6024 states and 25942 transitions. [2021-06-05 15:05:04,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:04,756 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 25942 transitions. [2021-06-05 15:05:04,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:04,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:04,766 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, 1, 1, 1] [2021-06-05 15:05:04,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:04,969 INFO L430 AbstractCegarLoop]: === Iteration 130 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:04,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:04,969 INFO L82 PathProgramCache]: Analyzing trace with hash -656334466, now seen corresponding path program 49 times [2021-06-05 15:05:04,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:04,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41713496] [2021-06-05 15:05:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:05,163 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 15:05:05,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:05,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41713496] [2021-06-05 15:05:05,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41713496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:05,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812130450] [2021-06-05 15:05:05,170 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 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 15:05:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:05,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:05,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:05,436 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 15:05:05,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:05,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:05,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:05,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:05:05,527 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 15:05:05,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812130450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:05,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:05,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:05:05,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655353619] [2021-06-05 15:05:05,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:05,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:05,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:05,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:05,528 INFO L87 Difference]: Start difference. First operand 6024 states and 25942 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:06,567 INFO L93 Difference]: Finished difference Result 6948 states and 29535 transitions. [2021-06-05 15:05:06,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:05:06,568 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:06,584 INFO L225 Difference]: With dead ends: 6948 [2021-06-05 15:05:06,584 INFO L226 Difference]: Without dead ends: 6933 [2021-06-05 15:05:06,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 817.8ms TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:05:06,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6933 states. [2021-06-05 15:05:06,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6933 to 6087. [2021-06-05 15:05:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6087 states, 6086 states have (on average 4.306112389089714) internal successors, (26207), 6086 states have internal predecessors, (26207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6087 states to 6087 states and 26207 transitions. [2021-06-05 15:05:06,704 INFO L78 Accepts]: Start accepts. Automaton has 6087 states and 26207 transitions. Word has length 33 [2021-06-05 15:05:06,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:06,704 INFO L482 AbstractCegarLoop]: Abstraction has 6087 states and 26207 transitions. [2021-06-05 15:05:06,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 6087 states and 26207 transitions. [2021-06-05 15:05:06,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:06,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:06,715 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, 1, 1, 1] [2021-06-05 15:05:06,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 15:05:06,916 INFO L430 AbstractCegarLoop]: === Iteration 131 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:06,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:06,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1970239388, now seen corresponding path program 50 times [2021-06-05 15:05:06,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:06,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271551119] [2021-06-05 15:05:06,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:07,084 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 15:05:07,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:07,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271551119] [2021-06-05 15:05:07,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271551119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:07,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008754738] [2021-06-05 15:05:07,085 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 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 15:05:07,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:07,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:07,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:07,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:07,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:07,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:07,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:07,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:07,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:07,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 15:05:07,470 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 15:05:07,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008754738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:07,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:07,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:05:07,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161086247] [2021-06-05 15:05:07,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:05:07,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:07,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:05:07,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:05:07,472 INFO L87 Difference]: Start difference. First operand 6087 states and 26207 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 15:05:08,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:08,490 INFO L93 Difference]: Finished difference Result 6483 states and 27696 transitions. [2021-06-05 15:05:08,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:05:08,490 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 15:05:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:08,505 INFO L225 Difference]: With dead ends: 6483 [2021-06-05 15:05:08,505 INFO L226 Difference]: Without dead ends: 6469 [2021-06-05 15:05:08,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 908.6ms TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:05:08,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2021-06-05 15:05:08,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 6073. [2021-06-05 15:05:08,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6073 states, 6072 states have (on average 4.308959156785244) internal successors, (26164), 6072 states have internal predecessors, (26164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:08,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6073 states to 6073 states and 26164 transitions. [2021-06-05 15:05:08,605 INFO L78 Accepts]: Start accepts. Automaton has 6073 states and 26164 transitions. Word has length 33 [2021-06-05 15:05:08,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:08,605 INFO L482 AbstractCegarLoop]: Abstraction has 6073 states and 26164 transitions. [2021-06-05 15:05:08,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 15:05:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 6073 states and 26164 transitions. [2021-06-05 15:05:08,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:08,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:08,615 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, 1, 1, 1] [2021-06-05 15:05:08,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 15:05:08,815 INFO L430 AbstractCegarLoop]: === Iteration 132 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:08,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:08,815 INFO L82 PathProgramCache]: Analyzing trace with hash -941434896, now seen corresponding path program 51 times [2021-06-05 15:05:08,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:08,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919094861] [2021-06-05 15:05:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:09,032 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 15:05:09,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:09,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919094861] [2021-06-05 15:05:09,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919094861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:09,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068090629] [2021-06-05 15:05:09,032 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 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 15:05:09,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:05:09,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:09,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:09,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:09,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:09,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:09,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:09,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:09,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:09,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:05:09,490 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 15:05:09,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068090629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:09,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:09,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:05:09,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388175937] [2021-06-05 15:05:09,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:05:09,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:09,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:05:09,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:05:09,491 INFO L87 Difference]: Start difference. First operand 6073 states and 26164 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:10,753 INFO L93 Difference]: Finished difference Result 6646 states and 28417 transitions. [2021-06-05 15:05:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:05:10,753 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:10,768 INFO L225 Difference]: With dead ends: 6646 [2021-06-05 15:05:10,768 INFO L226 Difference]: Without dead ends: 6627 [2021-06-05 15:05:10,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1104.8ms TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:05:10,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6627 states. [2021-06-05 15:05:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6627 to 6073. [2021-06-05 15:05:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6073 states, 6072 states have (on average 4.308959156785244) internal successors, (26164), 6072 states have internal predecessors, (26164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6073 states to 6073 states and 26164 transitions. [2021-06-05 15:05:10,862 INFO L78 Accepts]: Start accepts. Automaton has 6073 states and 26164 transitions. Word has length 33 [2021-06-05 15:05:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:10,862 INFO L482 AbstractCegarLoop]: Abstraction has 6073 states and 26164 transitions. [2021-06-05 15:05:10,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 6073 states and 26164 transitions. [2021-06-05 15:05:10,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:10,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:10,872 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, 1, 1, 1] [2021-06-05 15:05:11,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 15:05:11,080 INFO L430 AbstractCegarLoop]: === Iteration 133 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:11,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:11,080 INFO L82 PathProgramCache]: Analyzing trace with hash 755646114, now seen corresponding path program 52 times [2021-06-05 15:05:11,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:11,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521544273] [2021-06-05 15:05:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:11,277 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 15:05:11,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:11,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521544273] [2021-06-05 15:05:11,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521544273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:11,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572293795] [2021-06-05 15:05:11,278 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 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 15:05:11,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:11,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:11,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:11,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:11,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:11,531 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 28 treesize of output 12 [2021-06-05 15:05:11,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:11,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:11,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:11,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:05:11,617 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 15:05:11,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572293795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:11,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:11,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:05:11,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499576012] [2021-06-05 15:05:11,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:11,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:11,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:11,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:11,618 INFO L87 Difference]: Start difference. First operand 6073 states and 26164 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:12,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:12,970 INFO L93 Difference]: Finished difference Result 7065 states and 30042 transitions. [2021-06-05 15:05:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:05:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:12,988 INFO L225 Difference]: With dead ends: 7065 [2021-06-05 15:05:12,988 INFO L226 Difference]: Without dead ends: 7030 [2021-06-05 15:05:12,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1011.3ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:05:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7030 states. [2021-06-05 15:05:13,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7030 to 6011. [2021-06-05 15:05:13,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6011 states, 6010 states have (on average 4.31297836938436) internal successors, (25921), 6010 states have internal predecessors, (25921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:13,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6011 states to 6011 states and 25921 transitions. [2021-06-05 15:05:13,122 INFO L78 Accepts]: Start accepts. Automaton has 6011 states and 25921 transitions. Word has length 33 [2021-06-05 15:05:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:13,122 INFO L482 AbstractCegarLoop]: Abstraction has 6011 states and 25921 transitions. [2021-06-05 15:05:13,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 6011 states and 25921 transitions. [2021-06-05 15:05:13,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:13,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:13,133 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, 1, 1, 1] [2021-06-05 15:05:13,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:13,334 INFO L430 AbstractCegarLoop]: === Iteration 134 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:13,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:13,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1043651872, now seen corresponding path program 53 times [2021-06-05 15:05:13,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:13,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540837547] [2021-06-05 15:05:13,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:13,557 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 15:05:13,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:13,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540837547] [2021-06-05 15:05:13,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540837547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:13,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290169801] [2021-06-05 15:05:13,558 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 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 15:05:13,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:05:13,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:13,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:13,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:13,716 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 15:05:13,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:13,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:13,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:13,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 15:05:13,837 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 15:05:13,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290169801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:13,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:13,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:05:13,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773821151] [2021-06-05 15:05:13,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:13,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:13,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:13,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:13,838 INFO L87 Difference]: Start difference. First operand 6011 states and 25921 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:15,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:15,243 INFO L93 Difference]: Finished difference Result 7566 states and 32115 transitions. [2021-06-05 15:05:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:05:15,243 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:15,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:15,261 INFO L225 Difference]: With dead ends: 7566 [2021-06-05 15:05:15,261 INFO L226 Difference]: Without dead ends: 7516 [2021-06-05 15:05:15,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1145.0ms TimeCoverageRelationStatistics Valid=319, Invalid=1751, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:05:15,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2021-06-05 15:05:15,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 6306. [2021-06-05 15:05:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6306 states, 6305 states have (on average 4.32244250594766) internal successors, (27253), 6305 states have internal predecessors, (27253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6306 states to 6306 states and 27253 transitions. [2021-06-05 15:05:15,383 INFO L78 Accepts]: Start accepts. Automaton has 6306 states and 27253 transitions. Word has length 33 [2021-06-05 15:05:15,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:15,383 INFO L482 AbstractCegarLoop]: Abstraction has 6306 states and 27253 transitions. [2021-06-05 15:05:15,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 6306 states and 27253 transitions. [2021-06-05 15:05:15,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:15,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:15,393 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, 1, 1, 1] [2021-06-05 15:05:15,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:15,594 INFO L430 AbstractCegarLoop]: === Iteration 135 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:15,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:15,594 INFO L82 PathProgramCache]: Analyzing trace with hash 259620734, now seen corresponding path program 54 times [2021-06-05 15:05:15,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:15,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856027895] [2021-06-05 15:05:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:15,768 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 15:05:15,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:15,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856027895] [2021-06-05 15:05:15,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856027895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:15,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663276244] [2021-06-05 15:05:15,768 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 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 15:05:15,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:05:15,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:15,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:05:15,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:15,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:16,009 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:05:16,009 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 29 treesize of output 57 [2021-06-05 15:05:16,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:16,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:16,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:16,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 15:05:16,322 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 15:05:16,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663276244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:16,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:16,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:05:16,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479649072] [2021-06-05 15:05:16,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:05:16,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:16,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:05:16,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:16,323 INFO L87 Difference]: Start difference. First operand 6306 states and 27253 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:17,957 INFO L93 Difference]: Finished difference Result 7086 states and 30136 transitions. [2021-06-05 15:05:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:05:17,958 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:17,975 INFO L225 Difference]: With dead ends: 7086 [2021-06-05 15:05:17,976 INFO L226 Difference]: Without dead ends: 7064 [2021-06-05 15:05:17,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1231.4ms TimeCoverageRelationStatistics Valid=321, Invalid=1935, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:05:17,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7064 states. [2021-06-05 15:05:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7064 to 6315. [2021-06-05 15:05:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6315 states, 6314 states have (on average 4.31913208742477) internal successors, (27271), 6314 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 15:05:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 27271 transitions. [2021-06-05 15:05:18,091 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 27271 transitions. Word has length 33 [2021-06-05 15:05:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:18,091 INFO L482 AbstractCegarLoop]: Abstraction has 6315 states and 27271 transitions. [2021-06-05 15:05:18,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 27271 transitions. [2021-06-05 15:05:18,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:18,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:18,102 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, 1, 1, 1] [2021-06-05 15:05:18,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:18,303 INFO L430 AbstractCegarLoop]: === Iteration 136 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:18,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:18,303 INFO L82 PathProgramCache]: Analyzing trace with hash -639741338, now seen corresponding path program 55 times [2021-06-05 15:05:18,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:18,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326750770] [2021-06-05 15:05:18,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:18,537 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 15:05:18,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:18,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326750770] [2021-06-05 15:05:18,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326750770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:18,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11951232] [2021-06-05 15:05:18,538 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 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 15:05:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:18,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:18,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:18,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:18,747 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 29 treesize of output 13 [2021-06-05 15:05:18,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:18,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:18,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:18,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:05:18,864 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 15:05:18,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11951232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:18,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:18,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:05:18,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212925434] [2021-06-05 15:05:18,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:18,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:18,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:18,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:18,865 INFO L87 Difference]: Start difference. First operand 6315 states and 27271 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:19,370 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-05 15:05:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:21,299 INFO L93 Difference]: Finished difference Result 7847 states and 33031 transitions. [2021-06-05 15:05:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:05:21,300 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:21,317 INFO L225 Difference]: With dead ends: 7847 [2021-06-05 15:05:21,317 INFO L226 Difference]: Without dead ends: 7796 [2021-06-05 15:05:21,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1933.3ms TimeCoverageRelationStatistics Valid=463, Invalid=2959, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:05:21,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7796 states. [2021-06-05 15:05:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7796 to 6274. [2021-06-05 15:05:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6274 states, 6273 states have (on average 4.320102024549657) internal successors, (27100), 6273 states have internal predecessors, (27100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:21,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6274 states to 6274 states and 27100 transitions. [2021-06-05 15:05:21,431 INFO L78 Accepts]: Start accepts. Automaton has 6274 states and 27100 transitions. Word has length 33 [2021-06-05 15:05:21,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:21,431 INFO L482 AbstractCegarLoop]: Abstraction has 6274 states and 27100 transitions. [2021-06-05 15:05:21,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:21,431 INFO L276 IsEmpty]: Start isEmpty. Operand 6274 states and 27100 transitions. [2021-06-05 15:05:21,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:21,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:21,441 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, 1, 1, 1] [2021-06-05 15:05:21,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 15:05:21,642 INFO L430 AbstractCegarLoop]: === Iteration 137 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:21,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:21,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2025903986, now seen corresponding path program 56 times [2021-06-05 15:05:21,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:21,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312163438] [2021-06-05 15:05:21,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:21,852 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 15:05:21,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:21,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312163438] [2021-06-05 15:05:21,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312163438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:21,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546088452] [2021-06-05 15:05:21,852 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 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 15:05:21,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:21,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:21,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:05:21,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:22,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:22,051 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 15:05:22,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:22,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:22,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:22,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 15:05:22,252 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 15:05:22,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546088452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:22,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:22,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:05:22,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759202325] [2021-06-05 15:05:22,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:05:22,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:22,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:05:22,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:05:22,253 INFO L87 Difference]: Start difference. First operand 6274 states and 27100 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:24,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:24,928 INFO L93 Difference]: Finished difference Result 7830 states and 32405 transitions. [2021-06-05 15:05:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:05:24,929 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:24,947 INFO L225 Difference]: With dead ends: 7830 [2021-06-05 15:05:24,947 INFO L226 Difference]: Without dead ends: 7800 [2021-06-05 15:05:24,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 2347.6ms TimeCoverageRelationStatistics Valid=379, Invalid=3043, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:05:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2021-06-05 15:05:25,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6304. [2021-06-05 15:05:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6304 states, 6303 states have (on average 4.32206885610027) internal successors, (27242), 6303 states have internal predecessors, (27242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:25,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6304 states to 6304 states and 27242 transitions. [2021-06-05 15:05:25,064 INFO L78 Accepts]: Start accepts. Automaton has 6304 states and 27242 transitions. Word has length 33 [2021-06-05 15:05:25,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:25,064 INFO L482 AbstractCegarLoop]: Abstraction has 6304 states and 27242 transitions. [2021-06-05 15:05:25,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:25,064 INFO L276 IsEmpty]: Start isEmpty. Operand 6304 states and 27242 transitions. [2021-06-05 15:05:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:25,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:25,075 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, 1, 1, 1] [2021-06-05 15:05:25,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 15:05:25,275 INFO L430 AbstractCegarLoop]: === Iteration 138 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:25,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1220290908, now seen corresponding path program 57 times [2021-06-05 15:05:25,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:25,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730604183] [2021-06-05 15:05:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:25,465 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 15:05:25,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:25,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730604183] [2021-06-05 15:05:25,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730604183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:25,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053876550] [2021-06-05 15:05:25,465 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 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 15:05:25,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:05:25,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:25,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:25,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:25,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:25,669 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:05:25,670 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 29 treesize of output 57 [2021-06-05 15:05:25,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:25,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:25,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:25,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 15:05:25,955 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 15:05:25,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053876550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:25,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:25,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:05:25,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175461173] [2021-06-05 15:05:25,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:05:25,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:25,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:05:25,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:05:25,956 INFO L87 Difference]: Start difference. First operand 6304 states and 27242 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:28,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:28,122 INFO L93 Difference]: Finished difference Result 7675 states and 32393 transitions. [2021-06-05 15:05:28,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:05:28,122 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:28,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:28,140 INFO L225 Difference]: With dead ends: 7675 [2021-06-05 15:05:28,140 INFO L226 Difference]: Without dead ends: 7613 [2021-06-05 15:05:28,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1802.3ms TimeCoverageRelationStatistics Valid=402, Invalid=2790, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:05:28,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7613 states. [2021-06-05 15:05:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7613 to 6435. [2021-06-05 15:05:28,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6435 states, 6434 states have (on average 4.327012744793286) internal successors, (27840), 6434 states have internal predecessors, (27840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6435 states to 6435 states and 27840 transitions. [2021-06-05 15:05:28,247 INFO L78 Accepts]: Start accepts. Automaton has 6435 states and 27840 transitions. Word has length 33 [2021-06-05 15:05:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:28,247 INFO L482 AbstractCegarLoop]: Abstraction has 6435 states and 27840 transitions. [2021-06-05 15:05:28,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:28,248 INFO L276 IsEmpty]: Start isEmpty. Operand 6435 states and 27840 transitions. [2021-06-05 15:05:28,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:28,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:28,260 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, 1, 1, 1] [2021-06-05 15:05:28,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 15:05:28,465 INFO L430 AbstractCegarLoop]: === Iteration 139 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:28,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:28,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1771403782, now seen corresponding path program 58 times [2021-06-05 15:05:28,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:28,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615786080] [2021-06-05 15:05:28,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:28,682 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 15:05:28,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:28,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615786080] [2021-06-05 15:05:28,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615786080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:28,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63435220] [2021-06-05 15:05:28,683 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 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 15:05:28,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:28,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:28,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:28,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:28,862 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 15:05:28,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:28,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:28,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:28,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 15:05:29,000 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 15:05:29,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63435220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:29,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:29,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:05:29,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800480306] [2021-06-05 15:05:29,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:29,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:29,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:29,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:29,001 INFO L87 Difference]: Start difference. First operand 6435 states and 27840 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:30,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:30,155 INFO L93 Difference]: Finished difference Result 7805 states and 32976 transitions. [2021-06-05 15:05:30,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:05:30,155 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:30,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:30,173 INFO L225 Difference]: With dead ends: 7805 [2021-06-05 15:05:30,173 INFO L226 Difference]: Without dead ends: 7781 [2021-06-05 15:05:30,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 887.3ms TimeCoverageRelationStatistics Valid=267, Invalid=1455, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:05:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7781 states. [2021-06-05 15:05:30,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7781 to 6489. [2021-06-05 15:05:30,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6489 states, 6488 states have (on average 4.331072749691739) internal successors, (28100), 6488 states have internal predecessors, (28100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:30,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6489 states to 6489 states and 28100 transitions. [2021-06-05 15:05:30,299 INFO L78 Accepts]: Start accepts. Automaton has 6489 states and 28100 transitions. Word has length 33 [2021-06-05 15:05:30,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:30,299 INFO L482 AbstractCegarLoop]: Abstraction has 6489 states and 28100 transitions. [2021-06-05 15:05:30,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:30,299 INFO L276 IsEmpty]: Start isEmpty. Operand 6489 states and 28100 transitions. [2021-06-05 15:05:30,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:30,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:30,310 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, 1, 1, 1] [2021-06-05 15:05:30,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:30,510 INFO L430 AbstractCegarLoop]: === Iteration 140 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:30,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:30,510 INFO L82 PathProgramCache]: Analyzing trace with hash 855170072, now seen corresponding path program 59 times [2021-06-05 15:05:30,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:30,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110700197] [2021-06-05 15:05:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:30,681 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 15:05:30,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:30,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110700197] [2021-06-05 15:05:30,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110700197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:30,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573079207] [2021-06-05 15:05:30,682 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 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 15:05:30,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:05:30,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:30,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:30,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:30,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:30,869 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 29 treesize of output 13 [2021-06-05 15:05:30,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:30,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:30,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:30,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:05:30,973 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 15:05:30,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573079207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:30,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:30,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:05:30,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763711503] [2021-06-05 15:05:30,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:30,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:30,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:30,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:30,974 INFO L87 Difference]: Start difference. First operand 6489 states and 28100 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:05:32,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:32,103 INFO L93 Difference]: Finished difference Result 7827 states and 33033 transitions. [2021-06-05 15:05:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:05:32,103 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:05:32,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:32,122 INFO L225 Difference]: With dead ends: 7827 [2021-06-05 15:05:32,123 INFO L226 Difference]: Without dead ends: 7771 [2021-06-05 15:05:32,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 859.7ms TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:05:32,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2021-06-05 15:05:32,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 6483. [2021-06-05 15:05:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6483 states, 6482 states have (on average 4.333076211045974) internal successors, (28087), 6482 states have internal predecessors, (28087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 28087 transitions. [2021-06-05 15:05:32,240 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 28087 transitions. Word has length 33 [2021-06-05 15:05:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:32,240 INFO L482 AbstractCegarLoop]: Abstraction has 6483 states and 28087 transitions. [2021-06-05 15:05:32,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:05:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 28087 transitions. [2021-06-05 15:05:32,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:32,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:32,250 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, 1, 1, 1] [2021-06-05 15:05:32,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-05 15:05:32,451 INFO L430 AbstractCegarLoop]: === Iteration 141 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:32,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:32,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1739523228, now seen corresponding path program 60 times [2021-06-05 15:05:32,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:32,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28618238] [2021-06-05 15:05:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:32,651 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 15:05:32,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:32,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28618238] [2021-06-05 15:05:32,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28618238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:32,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023221142] [2021-06-05 15:05:32,652 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 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 15:05:32,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:05:32,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:32,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:05:32,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:32,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:32,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:32,853 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 25 treesize of output 31 [2021-06-05 15:05:32,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:32,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:32,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:32,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-05 15:05:33,036 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 15:05:33,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023221142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:33,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:33,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:05:33,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214154121] [2021-06-05 15:05:33,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:05:33,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:33,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:05:33,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:05:33,037 INFO L87 Difference]: Start difference. First operand 6483 states and 28087 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:34,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:34,588 INFO L93 Difference]: Finished difference Result 6950 states and 29841 transitions. [2021-06-05 15:05:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:05:34,588 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:34,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:34,605 INFO L225 Difference]: With dead ends: 6950 [2021-06-05 15:05:34,605 INFO L226 Difference]: Without dead ends: 6891 [2021-06-05 15:05:34,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1329.4ms TimeCoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:05:34,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2021-06-05 15:05:34,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 6471. [2021-06-05 15:05:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6471 states, 6470 states have (on average 4.332921174652241) internal successors, (28034), 6470 states have internal predecessors, (28034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6471 states to 6471 states and 28034 transitions. [2021-06-05 15:05:34,714 INFO L78 Accepts]: Start accepts. Automaton has 6471 states and 28034 transitions. Word has length 33 [2021-06-05 15:05:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:34,715 INFO L482 AbstractCegarLoop]: Abstraction has 6471 states and 28034 transitions. [2021-06-05 15:05:34,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 6471 states and 28034 transitions. [2021-06-05 15:05:34,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:34,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:34,725 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, 1, 1, 1] [2021-06-05 15:05:34,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 15:05:34,926 INFO L430 AbstractCegarLoop]: === Iteration 142 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:34,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:34,926 INFO L82 PathProgramCache]: Analyzing trace with hash -639895564, now seen corresponding path program 61 times [2021-06-05 15:05:34,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:34,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136168374] [2021-06-05 15:05:34,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:35,086 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 15:05:35,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:35,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136168374] [2021-06-05 15:05:35,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136168374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:35,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854834029] [2021-06-05 15:05:35,087 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 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 15:05:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:35,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:35,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:35,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:35,326 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 28 treesize of output 12 [2021-06-05 15:05:35,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:35,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:35,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:35,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:05:35,409 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 15:05:35,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854834029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:35,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:35,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:05:35,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540191534] [2021-06-05 15:05:35,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:35,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:35,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:35,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:35,410 INFO L87 Difference]: Start difference. First operand 6471 states and 28034 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:36,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:36,648 INFO L93 Difference]: Finished difference Result 8470 states and 35739 transitions. [2021-06-05 15:05:36,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:05:36,649 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:36,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:36,668 INFO L225 Difference]: With dead ends: 8470 [2021-06-05 15:05:36,668 INFO L226 Difference]: Without dead ends: 8420 [2021-06-05 15:05:36,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1120.8ms TimeCoverageRelationStatistics Valid=304, Invalid=1952, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:05:36,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8420 states. [2021-06-05 15:05:36,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8420 to 6765. [2021-06-05 15:05:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6765 states, 6764 states have (on average 4.344766410408043) internal successors, (29388), 6764 states have internal predecessors, (29388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6765 states to 6765 states and 29388 transitions. [2021-06-05 15:05:36,804 INFO L78 Accepts]: Start accepts. Automaton has 6765 states and 29388 transitions. Word has length 33 [2021-06-05 15:05:36,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:36,804 INFO L482 AbstractCegarLoop]: Abstraction has 6765 states and 29388 transitions. [2021-06-05 15:05:36,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6765 states and 29388 transitions. [2021-06-05 15:05:36,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:36,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:36,816 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, 1, 1, 1] [2021-06-05 15:05:37,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 15:05:37,016 INFO L430 AbstractCegarLoop]: === Iteration 143 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:37,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:37,016 INFO L82 PathProgramCache]: Analyzing trace with hash 663377042, now seen corresponding path program 62 times [2021-06-05 15:05:37,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:37,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709949597] [2021-06-05 15:05:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:37,181 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 15:05:37,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:37,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709949597] [2021-06-05 15:05:37,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709949597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:37,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608072571] [2021-06-05 15:05:37,182 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 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 15:05:37,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:37,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:37,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:37,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:37,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:37,417 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:05:37,417 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 27 treesize of output 55 [2021-06-05 15:05:37,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:05:37,466 INFO L628 ElimStorePlain]: treesize reduction 74, result has 22.9 percent of original size [2021-06-05 15:05:37,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:37,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 15:05:37,610 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 15:05:37,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608072571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:37,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:37,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:05:37,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099763876] [2021-06-05 15:05:37,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:05:37,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:37,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:05:37,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:37,611 INFO L87 Difference]: Start difference. First operand 6765 states and 29388 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:39,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:39,139 INFO L93 Difference]: Finished difference Result 8081 states and 34208 transitions. [2021-06-05 15:05:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:05:39,140 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:39,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:39,159 INFO L225 Difference]: With dead ends: 8081 [2021-06-05 15:05:39,159 INFO L226 Difference]: Without dead ends: 8059 [2021-06-05 15:05:39,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1152.9ms TimeCoverageRelationStatistics Valid=339, Invalid=2417, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:05:39,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8059 states. [2021-06-05 15:05:39,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8059 to 6725. [2021-06-05 15:05:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6725 states, 6724 states have (on average 4.343694229625223) internal successors, (29207), 6724 states have internal predecessors, (29207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:39,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6725 states to 6725 states and 29207 transitions. [2021-06-05 15:05:39,286 INFO L78 Accepts]: Start accepts. Automaton has 6725 states and 29207 transitions. Word has length 33 [2021-06-05 15:05:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:39,286 INFO L482 AbstractCegarLoop]: Abstraction has 6725 states and 29207 transitions. [2021-06-05 15:05:39,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 6725 states and 29207 transitions. [2021-06-05 15:05:39,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:39,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:39,298 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, 1, 1, 1] [2021-06-05 15:05:39,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 15:05:39,498 INFO L430 AbstractCegarLoop]: === Iteration 144 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:39,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:39,498 INFO L82 PathProgramCache]: Analyzing trace with hash -235985030, now seen corresponding path program 63 times [2021-06-05 15:05:39,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:39,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990256734] [2021-06-05 15:05:39,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:39,722 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 15:05:39,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:39,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990256734] [2021-06-05 15:05:39,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990256734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:39,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001201758] [2021-06-05 15:05:39,722 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 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 15:05:39,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:05:39,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:39,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:39,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:39,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:39,961 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:05:39,962 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 27 treesize of output 55 [2021-06-05 15:05:39,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:05:39,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:39,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:39,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 15:05:40,115 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 15:05:40,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001201758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:40,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:40,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:05:40,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112203935] [2021-06-05 15:05:40,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:05:40,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:40,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:05:40,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:40,116 INFO L87 Difference]: Start difference. First operand 6725 states and 29207 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:40,859 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-06-05 15:05:42,720 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 15:05:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:43,124 INFO L93 Difference]: Finished difference Result 8076 states and 34225 transitions. [2021-06-05 15:05:43,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:05:43,124 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:43,142 INFO L225 Difference]: With dead ends: 8076 [2021-06-05 15:05:43,143 INFO L226 Difference]: Without dead ends: 8046 [2021-06-05 15:05:43,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 2568.1ms TimeCoverageRelationStatistics Valid=483, Invalid=4073, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:05:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8046 states. [2021-06-05 15:05:43,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8046 to 6676. [2021-06-05 15:05:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6676 states, 6675 states have (on average 4.3417228464419475) internal successors, (28981), 6675 states have internal predecessors, (28981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6676 states to 6676 states and 28981 transitions. [2021-06-05 15:05:43,251 INFO L78 Accepts]: Start accepts. Automaton has 6676 states and 28981 transitions. Word has length 33 [2021-06-05 15:05:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:43,252 INFO L482 AbstractCegarLoop]: Abstraction has 6676 states and 28981 transitions. [2021-06-05 15:05:43,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 6676 states and 28981 transitions. [2021-06-05 15:05:43,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:43,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:43,262 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, 1, 1, 1] [2021-06-05 15:05:43,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 15:05:43,463 INFO L430 AbstractCegarLoop]: === Iteration 145 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:43,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:43,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2016583332, now seen corresponding path program 64 times [2021-06-05 15:05:43,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:43,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642156522] [2021-06-05 15:05:43,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:43,746 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 15:05:43,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:43,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642156522] [2021-06-05 15:05:43,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642156522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:43,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507571012] [2021-06-05 15:05:43,746 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 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 15:05:43,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:43,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:43,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:43,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:43,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:43,945 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 28 treesize of output 12 [2021-06-05 15:05:43,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:43,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:43,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:43,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:05:44,030 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 15:05:44,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507571012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:44,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:44,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:05:44,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892059164] [2021-06-05 15:05:44,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:44,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:44,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:44,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:44,031 INFO L87 Difference]: Start difference. First operand 6676 states and 28981 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:45,847 INFO L93 Difference]: Finished difference Result 8754 states and 36818 transitions. [2021-06-05 15:05:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:05:45,847 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:45,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:45,866 INFO L225 Difference]: With dead ends: 8754 [2021-06-05 15:05:45,866 INFO L226 Difference]: Without dead ends: 8710 [2021-06-05 15:05:45,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1483.1ms TimeCoverageRelationStatistics Valid=408, Invalid=2672, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:05:45,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8710 states. [2021-06-05 15:05:45,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8710 to 6742. [2021-06-05 15:05:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6742 states, 6741 states have (on average 4.34816792760718) internal successors, (29311), 6741 states have internal predecessors, (29311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6742 states to 6742 states and 29311 transitions. [2021-06-05 15:05:45,992 INFO L78 Accepts]: Start accepts. Automaton has 6742 states and 29311 transitions. Word has length 33 [2021-06-05 15:05:45,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:45,992 INFO L482 AbstractCegarLoop]: Abstraction has 6742 states and 29311 transitions. [2021-06-05 15:05:45,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:45,992 INFO L276 IsEmpty]: Start isEmpty. Operand 6742 states and 29311 transitions. [2021-06-05 15:05:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:46,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:46,003 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, 1, 1, 1] [2021-06-05 15:05:46,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 15:05:46,203 INFO L430 AbstractCegarLoop]: === Iteration 146 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:46,204 INFO L82 PathProgramCache]: Analyzing trace with hash -120663244, now seen corresponding path program 65 times [2021-06-05 15:05:46,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:46,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598559022] [2021-06-05 15:05:46,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:46,452 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 15:05:46,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:46,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598559022] [2021-06-05 15:05:46,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598559022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:46,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814347970] [2021-06-05 15:05:46,453 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 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 15:05:46,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:05:46,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:46,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:46,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:46,643 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 15:05:46,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:46,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:46,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:46,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:05:46,723 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 15:05:46,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814347970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:46,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:46,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:05:46,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699904986] [2021-06-05 15:05:46,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:46,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:46,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:46,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:46,724 INFO L87 Difference]: Start difference. First operand 6742 states and 29311 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:47,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:47,926 INFO L93 Difference]: Finished difference Result 7478 states and 32071 transitions. [2021-06-05 15:05:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:05:47,926 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:47,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:47,943 INFO L225 Difference]: With dead ends: 7478 [2021-06-05 15:05:47,943 INFO L226 Difference]: Without dead ends: 7429 [2021-06-05 15:05:47,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1026.1ms TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:05:47,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7429 states. [2021-06-05 15:05:48,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7429 to 6727. [2021-06-05 15:05:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6727 states, 6726 states have (on average 4.349093071662207) internal successors, (29252), 6726 states have internal predecessors, (29252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 29252 transitions. [2021-06-05 15:05:48,063 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 29252 transitions. Word has length 33 [2021-06-05 15:05:48,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:48,063 INFO L482 AbstractCegarLoop]: Abstraction has 6727 states and 29252 transitions. [2021-06-05 15:05:48,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:48,064 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 29252 transitions. [2021-06-05 15:05:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:48,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:48,075 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, 1, 1, 1] [2021-06-05 15:05:48,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 15:05:48,277 INFO L430 AbstractCegarLoop]: === Iteration 147 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash -364579814, now seen corresponding path program 66 times [2021-06-05 15:05:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:48,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757690634] [2021-06-05 15:05:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:48,440 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 15:05:48,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:48,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757690634] [2021-06-05 15:05:48,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757690634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:48,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460596156] [2021-06-05 15:05:48,440 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 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 15:05:48,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:05:48,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:48,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:05:48,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:48,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:48,780 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:05:48,780 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 29 treesize of output 57 [2021-06-05 15:05:48,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:05:48,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:48,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:48,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-06-05 15:05:48,888 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 15:05:48,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460596156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:48,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:48,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:05:48,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584258264] [2021-06-05 15:05:48,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:05:48,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:48,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:05:48,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:05:48,889 INFO L87 Difference]: Start difference. First operand 6727 states and 29252 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:50,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:50,484 INFO L93 Difference]: Finished difference Result 7339 states and 31508 transitions. [2021-06-05 15:05:50,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:05:50,484 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:50,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:50,501 INFO L225 Difference]: With dead ends: 7339 [2021-06-05 15:05:50,501 INFO L226 Difference]: Without dead ends: 7274 [2021-06-05 15:05:50,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1281.0ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:05:50,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2021-06-05 15:05:50,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 6718. [2021-06-05 15:05:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6718 states, 6717 states have (on average 4.3476254280184605) internal successors, (29203), 6717 states have internal predecessors, (29203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6718 states to 6718 states and 29203 transitions. [2021-06-05 15:05:50,614 INFO L78 Accepts]: Start accepts. Automaton has 6718 states and 29203 transitions. Word has length 33 [2021-06-05 15:05:50,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:50,614 INFO L482 AbstractCegarLoop]: Abstraction has 6718 states and 29203 transitions. [2021-06-05 15:05:50,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:50,614 INFO L276 IsEmpty]: Start isEmpty. Operand 6718 states and 29203 transitions. [2021-06-05 15:05:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:50,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:50,625 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, 1, 1, 1] [2021-06-05 15:05:50,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 15:05:50,826 INFO L430 AbstractCegarLoop]: === Iteration 148 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:50,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:50,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1671265466, now seen corresponding path program 67 times [2021-06-05 15:05:50,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:50,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845079648] [2021-06-05 15:05:50,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:50,994 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 15:05:50,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:50,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845079648] [2021-06-05 15:05:50,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845079648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:50,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474823028] [2021-06-05 15:05:50,995 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 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 15:05:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:51,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:51,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:51,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:51,212 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 28 treesize of output 12 [2021-06-05 15:05:51,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:51,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:51,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:51,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:05:51,293 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 15:05:51,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474823028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:51,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:51,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:05:51,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147311580] [2021-06-05 15:05:51,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:51,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:51,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:51,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:51,294 INFO L87 Difference]: Start difference. First operand 6718 states and 29203 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:52,614 INFO L93 Difference]: Finished difference Result 8157 states and 34663 transitions. [2021-06-05 15:05:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:05:52,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:52,633 INFO L225 Difference]: With dead ends: 8157 [2021-06-05 15:05:52,633 INFO L226 Difference]: Without dead ends: 8107 [2021-06-05 15:05:52,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1048.3ms TimeCoverageRelationStatistics Valid=277, Invalid=1793, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:05:52,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8107 states. [2021-06-05 15:05:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8107 to 6966. [2021-06-05 15:05:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6966 states, 6965 states have (on average 4.353481694185212) internal successors, (30322), 6965 states have internal predecessors, (30322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:52,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6966 states to 6966 states and 30322 transitions. [2021-06-05 15:05:52,753 INFO L78 Accepts]: Start accepts. Automaton has 6966 states and 30322 transitions. Word has length 33 [2021-06-05 15:05:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:52,753 INFO L482 AbstractCegarLoop]: Abstraction has 6966 states and 30322 transitions. [2021-06-05 15:05:52,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:52,753 INFO L276 IsEmpty]: Start isEmpty. Operand 6966 states and 30322 transitions. [2021-06-05 15:05:52,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:52,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:52,764 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, 1, 1, 1] [2021-06-05 15:05:52,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:52,965 INFO L430 AbstractCegarLoop]: === Iteration 149 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:52,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:52,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1320429224, now seen corresponding path program 68 times [2021-06-05 15:05:52,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:52,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010448707] [2021-06-05 15:05:52,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:53,126 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 15:05:53,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:53,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010448707] [2021-06-05 15:05:53,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010448707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:53,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319941292] [2021-06-05 15:05:53,126 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 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 15:05:53,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:53,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:53,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:53,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:53,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:53,353 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:05:53,354 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 27 treesize of output 55 [2021-06-05 15:05:53,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:05:53,384 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-06-05 15:05:53,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:53,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 15:05:53,580 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 15:05:53,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319941292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:53,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:53,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:05:53,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252311697] [2021-06-05 15:05:53,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:05:53,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:53,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:05:53,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:53,581 INFO L87 Difference]: Start difference. First operand 6966 states and 30322 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:54,974 INFO L93 Difference]: Finished difference Result 8100 states and 34390 transitions. [2021-06-05 15:05:54,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:05:54,974 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:54,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:54,998 INFO L225 Difference]: With dead ends: 8100 [2021-06-05 15:05:54,998 INFO L226 Difference]: Without dead ends: 8078 [2021-06-05 15:05:54,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1216.9ms TimeCoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:05:55,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8078 states. [2021-06-05 15:05:55,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8078 to 6917. [2021-06-05 15:05:55,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6917 states, 6916 states have (on average 4.353817235396183) internal successors, (30111), 6916 states have internal predecessors, (30111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:55,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6917 states to 6917 states and 30111 transitions. [2021-06-05 15:05:55,121 INFO L78 Accepts]: Start accepts. Automaton has 6917 states and 30111 transitions. Word has length 33 [2021-06-05 15:05:55,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:55,121 INFO L482 AbstractCegarLoop]: Abstraction has 6917 states and 30111 transitions. [2021-06-05 15:05:55,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:55,121 INFO L276 IsEmpty]: Start isEmpty. Operand 6917 states and 30111 transitions. [2021-06-05 15:05:55,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:55,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:55,132 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, 1, 1, 1] [2021-06-05 15:05:55,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 15:05:55,333 INFO L430 AbstractCegarLoop]: === Iteration 150 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2075176000, now seen corresponding path program 69 times [2021-06-05 15:05:55,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:55,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326387989] [2021-06-05 15:05:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:55,543 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 15:05:55,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:55,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326387989] [2021-06-05 15:05:55,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326387989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:55,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290178890] [2021-06-05 15:05:55,543 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 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 15:05:55,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:05:55,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:55,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:05:55,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:55,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:55,775 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:05:55,776 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 27 treesize of output 55 [2021-06-05 15:05:55,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:05:55,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:55,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:55,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 15:05:55,925 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 15:05:55,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290178890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:55,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:55,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:05:55,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437557422] [2021-06-05 15:05:55,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:05:55,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:55,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:05:55,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:55,926 INFO L87 Difference]: Start difference. First operand 6917 states and 30111 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:56,791 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-05 15:05:59,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:59,526 INFO L93 Difference]: Finished difference Result 7942 states and 34054 transitions. [2021-06-05 15:05:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:05:59,526 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:05:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:59,544 INFO L225 Difference]: With dead ends: 7942 [2021-06-05 15:05:59,545 INFO L226 Difference]: Without dead ends: 7927 [2021-06-05 15:05:59,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 2849.2ms TimeCoverageRelationStatistics Valid=491, Invalid=4201, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:05:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-06-05 15:05:59,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 6917. [2021-06-05 15:05:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6917 states, 6916 states have (on average 4.353383458646617) internal successors, (30108), 6916 states have internal predecessors, (30108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6917 states to 6917 states and 30108 transitions. [2021-06-05 15:05:59,659 INFO L78 Accepts]: Start accepts. Automaton has 6917 states and 30108 transitions. Word has length 33 [2021-06-05 15:05:59,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:59,659 INFO L482 AbstractCegarLoop]: Abstraction has 6917 states and 30108 transitions. [2021-06-05 15:05:59,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 6917 states and 30108 transitions. [2021-06-05 15:05:59,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:05:59,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:59,670 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, 1, 1, 1] [2021-06-05 15:05:59,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:59,871 INFO L430 AbstractCegarLoop]: === Iteration 151 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:59,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:59,871 INFO L82 PathProgramCache]: Analyzing trace with hash 294577698, now seen corresponding path program 70 times [2021-06-05 15:05:59,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:59,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341246353] [2021-06-05 15:05:59,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:00,077 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 15:06:00,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:00,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341246353] [2021-06-05 15:06:00,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341246353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:00,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245839883] [2021-06-05 15:06:00,078 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 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 15:06:00,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:00,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:00,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:00,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:00,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:00,263 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 28 treesize of output 12 [2021-06-05 15:06:00,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:00,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:00,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:00,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:06:00,347 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 15:06:00,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245839883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:00,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:00,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:06:00,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616995711] [2021-06-05 15:06:00,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:06:00,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:00,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:06:00,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:00,348 INFO L87 Difference]: Start difference. First operand 6917 states and 30108 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:02,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:02,567 INFO L93 Difference]: Finished difference Result 8117 states and 34723 transitions. [2021-06-05 15:06:02,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:06:02,567 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:02,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:02,585 INFO L225 Difference]: With dead ends: 8117 [2021-06-05 15:06:02,585 INFO L226 Difference]: Without dead ends: 8082 [2021-06-05 15:06:02,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1725.3ms TimeCoverageRelationStatistics Valid=384, Invalid=2586, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:06:02,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8082 states. [2021-06-05 15:06:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8082 to 6853. [2021-06-05 15:06:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 6852 states have (on average 4.355662580268535) internal successors, (29845), 6852 states have internal predecessors, (29845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:02,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 29845 transitions. [2021-06-05 15:06:02,701 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 29845 transitions. Word has length 33 [2021-06-05 15:06:02,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:02,702 INFO L482 AbstractCegarLoop]: Abstraction has 6853 states and 29845 transitions. [2021-06-05 15:06:02,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 29845 transitions. [2021-06-05 15:06:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:02,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:02,713 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, 1, 1, 1] [2021-06-05 15:06:02,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:02,913 INFO L430 AbstractCegarLoop]: === Iteration 152 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:02,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2104469510, now seen corresponding path program 71 times [2021-06-05 15:06:02,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:02,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328319999] [2021-06-05 15:06:02,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:03,084 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 15:06:03,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:03,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328319999] [2021-06-05 15:06:03,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328319999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:03,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079853457] [2021-06-05 15:06:03,084 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 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 15:06:03,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:06:03,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:03,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:03,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:03,271 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 15:06:03,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:03,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:03,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:03,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:06:03,355 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 15:06:03,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079853457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:03,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:03,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:06:03,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786957414] [2021-06-05 15:06:03,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:03,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:03,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:03,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:03,356 INFO L87 Difference]: Start difference. First operand 6853 states and 29845 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:04,699 INFO L93 Difference]: Finished difference Result 7506 states and 32235 transitions. [2021-06-05 15:06:04,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:06:04,699 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:04,716 INFO L225 Difference]: With dead ends: 7506 [2021-06-05 15:06:04,717 INFO L226 Difference]: Without dead ends: 7457 [2021-06-05 15:06:04,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1087.0ms TimeCoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:06:04,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7457 states. [2021-06-05 15:06:04,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7457 to 6808. [2021-06-05 15:06:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6808 states, 6807 states have (on average 4.354047304245629) internal successors, (29638), 6807 states have internal predecessors, (29638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6808 states to 6808 states and 29638 transitions. [2021-06-05 15:06:04,872 INFO L78 Accepts]: Start accepts. Automaton has 6808 states and 29638 transitions. Word has length 33 [2021-06-05 15:06:04,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:04,872 INFO L482 AbstractCegarLoop]: Abstraction has 6808 states and 29638 transitions. [2021-06-05 15:06:04,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 6808 states and 29638 transitions. [2021-06-05 15:06:04,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:04,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:04,883 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, 1, 1, 1] [2021-06-05 15:06:05,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-06-05 15:06:05,084 INFO L430 AbstractCegarLoop]: === Iteration 153 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:05,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1946581216, now seen corresponding path program 72 times [2021-06-05 15:06:05,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:05,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786839830] [2021-06-05 15:06:05,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:05,243 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 15:06:05,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:05,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786839830] [2021-06-05 15:06:05,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786839830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:05,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989917989] [2021-06-05 15:06:05,244 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 15:06:05,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:06:05,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:05,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:06:05,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:05,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:05,562 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:06:05,563 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 29 treesize of output 57 [2021-06-05 15:06:05,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:06:05,597 INFO L628 ElimStorePlain]: treesize reduction 83, result has 21.0 percent of original size [2021-06-05 15:06:05,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:05,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:22 [2021-06-05 15:06:05,695 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 15:06:05,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989917989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:05,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:05,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:06:05,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304015761] [2021-06-05 15:06:05,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:06:05,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:05,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:06:05,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:06:05,696 INFO L87 Difference]: Start difference. First operand 6808 states and 29638 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:07,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:07,193 INFO L93 Difference]: Finished difference Result 7476 states and 31984 transitions. [2021-06-05 15:06:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:06:07,194 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:07,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:07,210 INFO L225 Difference]: With dead ends: 7476 [2021-06-05 15:06:07,211 INFO L226 Difference]: Without dead ends: 7411 [2021-06-05 15:06:07,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1282.6ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:06:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2021-06-05 15:06:07,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 6766. [2021-06-05 15:06:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6766 states, 6765 states have (on average 4.349445676274945) internal successors, (29424), 6765 states have internal predecessors, (29424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6766 states to 6766 states and 29424 transitions. [2021-06-05 15:06:07,328 INFO L78 Accepts]: Start accepts. Automaton has 6766 states and 29424 transitions. Word has length 33 [2021-06-05 15:06:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:07,328 INFO L482 AbstractCegarLoop]: Abstraction has 6766 states and 29424 transitions. [2021-06-05 15:06:07,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:07,329 INFO L276 IsEmpty]: Start isEmpty. Operand 6766 states and 29424 transitions. [2021-06-05 15:06:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:07,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:07,339 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, 1, 1, 1] [2021-06-05 15:06:07,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:07,540 INFO L430 AbstractCegarLoop]: === Iteration 154 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:07,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:07,540 INFO L82 PathProgramCache]: Analyzing trace with hash -193710086, now seen corresponding path program 73 times [2021-06-05 15:06:07,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:07,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052178854] [2021-06-05 15:06:07,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:07,767 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 15:06:07,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:07,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052178854] [2021-06-05 15:06:07,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052178854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:07,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574225006] [2021-06-05 15:06:07,768 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 15:06:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:07,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:07,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:08,030 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 15:06:08,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:08,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:08,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:08,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:06:08,091 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 15:06:08,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574225006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:08,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:08,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:06:08,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562528847] [2021-06-05 15:06:08,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:08,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:08,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:08,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:08,092 INFO L87 Difference]: Start difference. First operand 6766 states and 29424 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:09,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:09,226 INFO L93 Difference]: Finished difference Result 7141 states and 30729 transitions. [2021-06-05 15:06:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:06:09,227 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:09,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:09,243 INFO L225 Difference]: With dead ends: 7141 [2021-06-05 15:06:09,243 INFO L226 Difference]: Without dead ends: 7080 [2021-06-05 15:06:09,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 908.8ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:06:09,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7080 states. [2021-06-05 15:06:09,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7080 to 6772. [2021-06-05 15:06:09,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6772 states, 6771 states have (on average 4.347954511888938) internal successors, (29440), 6771 states have internal predecessors, (29440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 29440 transitions. [2021-06-05 15:06:09,353 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 29440 transitions. Word has length 33 [2021-06-05 15:06:09,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:09,353 INFO L482 AbstractCegarLoop]: Abstraction has 6772 states and 29440 transitions. [2021-06-05 15:06:09,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:09,353 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 29440 transitions. [2021-06-05 15:06:09,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:09,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:09,364 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, 1, 1, 1] [2021-06-05 15:06:09,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:09,565 INFO L430 AbstractCegarLoop]: === Iteration 155 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:09,565 INFO L82 PathProgramCache]: Analyzing trace with hash -644955254, now seen corresponding path program 74 times [2021-06-05 15:06:09,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:09,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673910225] [2021-06-05 15:06:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:09,744 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 15:06:09,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:09,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673910225] [2021-06-05 15:06:09,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673910225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:09,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762505108] [2021-06-05 15:06:09,744 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 15:06:09,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:09,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:09,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:09,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:10,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:10,064 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:06:10,064 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 33 treesize of output 61 [2021-06-05 15:06:10,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:06:10,088 INFO L628 ElimStorePlain]: treesize reduction 52, result has 29.7 percent of original size [2021-06-05 15:06:10,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:10,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-06-05 15:06:10,180 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 15:06:10,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762505108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:10,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:10,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:06:10,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885051521] [2021-06-05 15:06:10,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:06:10,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:10,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:06:10,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:06:10,181 INFO L87 Difference]: Start difference. First operand 6772 states and 29440 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:11,630 INFO L93 Difference]: Finished difference Result 7379 states and 31545 transitions. [2021-06-05 15:06:11,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:06:11,630 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:11,646 INFO L225 Difference]: With dead ends: 7379 [2021-06-05 15:06:11,646 INFO L226 Difference]: Without dead ends: 7314 [2021-06-05 15:06:11,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1159.9ms TimeCoverageRelationStatistics Valid=168, Invalid=1902, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:06:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7314 states. [2021-06-05 15:06:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7314 to 6745. [2021-06-05 15:06:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6745 states, 6744 states have (on average 4.347419928825623) internal successors, (29319), 6744 states have internal predecessors, (29319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6745 states to 6745 states and 29319 transitions. [2021-06-05 15:06:11,754 INFO L78 Accepts]: Start accepts. Automaton has 6745 states and 29319 transitions. Word has length 33 [2021-06-05 15:06:11,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:11,754 INFO L482 AbstractCegarLoop]: Abstraction has 6745 states and 29319 transitions. [2021-06-05 15:06:11,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:11,754 INFO L276 IsEmpty]: Start isEmpty. Operand 6745 states and 29319 transitions. [2021-06-05 15:06:11,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:11,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:11,766 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, 1, 1, 1] [2021-06-05 15:06:11,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:11,966 INFO L430 AbstractCegarLoop]: === Iteration 156 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:11,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:11,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1096875184, now seen corresponding path program 75 times [2021-06-05 15:06:11,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:11,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732956132] [2021-06-05 15:06:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:12,184 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 15:06:12,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:12,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732956132] [2021-06-05 15:06:12,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732956132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:12,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788363246] [2021-06-05 15:06:12,184 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 15:06:12,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:06:12,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:12,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:12,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:12,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:12,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:06:12,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:12,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:12,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:12,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 15:06:12,575 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 15:06:12,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788363246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:12,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:12,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:06:12,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266245176] [2021-06-05 15:06:12,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:06:12,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:12,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:06:12,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:06:12,576 INFO L87 Difference]: Start difference. First operand 6745 states and 29319 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:13,358 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-06-05 15:06:14,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:14,735 INFO L93 Difference]: Finished difference Result 8079 states and 34659 transitions. [2021-06-05 15:06:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:06:14,735 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:14,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:14,753 INFO L225 Difference]: With dead ends: 8079 [2021-06-05 15:06:14,753 INFO L226 Difference]: Without dead ends: 8060 [2021-06-05 15:06:14,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1985.8ms TimeCoverageRelationStatistics Valid=357, Invalid=1995, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:06:14,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8060 states. [2021-06-05 15:06:14,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8060 to 6853. [2021-06-05 15:06:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 6852 states have (on average 4.350992410974897) internal successors, (29813), 6852 states have internal predecessors, (29813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:14,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 29813 transitions. [2021-06-05 15:06:14,871 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 29813 transitions. Word has length 33 [2021-06-05 15:06:14,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:14,871 INFO L482 AbstractCegarLoop]: Abstraction has 6853 states and 29813 transitions. [2021-06-05 15:06:14,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 29813 transitions. [2021-06-05 15:06:14,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:14,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:14,882 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, 1, 1, 1] [2021-06-05 15:06:15,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:15,083 INFO L430 AbstractCegarLoop]: === Iteration 157 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:15,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:15,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1894819506, now seen corresponding path program 76 times [2021-06-05 15:06:15,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:15,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516528925] [2021-06-05 15:06:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:15,228 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 15:06:15,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:15,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516528925] [2021-06-05 15:06:15,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516528925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:15,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626182624] [2021-06-05 15:06:15,228 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 15:06:15,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:15,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:15,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:15,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:15,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:15,419 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 28 treesize of output 12 [2021-06-05 15:06:15,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:15,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:15,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:15,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:06:15,500 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 15:06:15,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626182624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:15,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:15,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:06:15,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658816622] [2021-06-05 15:06:15,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:15,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:15,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:15,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:15,501 INFO L87 Difference]: Start difference. First operand 6853 states and 29813 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:16,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:16,622 INFO L93 Difference]: Finished difference Result 8584 states and 36474 transitions. [2021-06-05 15:06:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:06:16,622 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:16,641 INFO L225 Difference]: With dead ends: 8584 [2021-06-05 15:06:16,641 INFO L226 Difference]: Without dead ends: 8556 [2021-06-05 15:06:16,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 770.7ms TimeCoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:06:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2021-06-05 15:06:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 6958. [2021-06-05 15:06:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6958 states, 6957 states have (on average 4.358919074313641) internal successors, (30325), 6957 states have internal predecessors, (30325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 30325 transitions. [2021-06-05 15:06:16,772 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 30325 transitions. Word has length 33 [2021-06-05 15:06:16,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:16,772 INFO L482 AbstractCegarLoop]: Abstraction has 6958 states and 30325 transitions. [2021-06-05 15:06:16,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:16,772 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 30325 transitions. [2021-06-05 15:06:16,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:16,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:16,783 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, 1, 1, 1] [2021-06-05 15:06:16,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 15:06:16,984 INFO L430 AbstractCegarLoop]: === Iteration 158 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:16,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:16,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1948206026, now seen corresponding path program 77 times [2021-06-05 15:06:16,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:16,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132185568] [2021-06-05 15:06:16,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:17,132 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 15:06:17,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:17,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132185568] [2021-06-05 15:06:17,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132185568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:17,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159183221] [2021-06-05 15:06:17,132 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 15:06:17,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:06:17,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:17,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:17,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:17,317 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 15:06:17,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:17,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:17,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:17,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:06:17,391 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 15:06:17,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159183221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:17,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:17,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:06:17,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82945423] [2021-06-05 15:06:17,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:06:17,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:17,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:06:17,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:06:17,392 INFO L87 Difference]: Start difference. First operand 6958 states and 30325 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:06:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:18,420 INFO L93 Difference]: Finished difference Result 8561 states and 36382 transitions. [2021-06-05 15:06:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:06:18,420 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 15:06:18,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:18,439 INFO L225 Difference]: With dead ends: 8561 [2021-06-05 15:06:18,440 INFO L226 Difference]: Without dead ends: 8528 [2021-06-05 15:06:18,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 719.3ms TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:06:18,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8528 states. [2021-06-05 15:06:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8528 to 6933. [2021-06-05 15:06:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6933 states, 6932 states have (on average 4.360357761107905) internal successors, (30226), 6932 states have internal predecessors, (30226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6933 states to 6933 states and 30226 transitions. [2021-06-05 15:06:18,586 INFO L78 Accepts]: Start accepts. Automaton has 6933 states and 30226 transitions. Word has length 33 [2021-06-05 15:06:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:18,586 INFO L482 AbstractCegarLoop]: Abstraction has 6933 states and 30226 transitions. [2021-06-05 15:06:18,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:06:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 6933 states and 30226 transitions. [2021-06-05 15:06:18,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:18,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:18,598 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, 1, 1, 1] [2021-06-05 15:06:18,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:18,798 INFO L430 AbstractCegarLoop]: === Iteration 159 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:18,799 INFO L82 PathProgramCache]: Analyzing trace with hash 114623070, now seen corresponding path program 78 times [2021-06-05 15:06:18,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:18,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484825471] [2021-06-05 15:06:18,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:18,971 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 15:06:18,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:18,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484825471] [2021-06-05 15:06:18,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484825471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:18,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528726020] [2021-06-05 15:06:18,972 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 15:06:19,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:06:19,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:19,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:06:19,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:19,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:19,242 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 15:06:19,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:19,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:19,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:19,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:06:19,402 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 15:06:19,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528726020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:19,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:19,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:06:19,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169733714] [2021-06-05 15:06:19,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:06:19,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:19,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:06:19,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:06:19,404 INFO L87 Difference]: Start difference. First operand 6933 states and 30226 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:21,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:21,006 INFO L93 Difference]: Finished difference Result 7914 states and 34231 transitions. [2021-06-05 15:06:21,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:06:21,006 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:21,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:21,024 INFO L225 Difference]: With dead ends: 7914 [2021-06-05 15:06:21,024 INFO L226 Difference]: Without dead ends: 7899 [2021-06-05 15:06:21,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1148.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:06:21,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7899 states. [2021-06-05 15:06:21,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7899 to 6921. [2021-06-05 15:06:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6921 states, 6920 states have (on average 4.361705202312138) internal successors, (30183), 6920 states have internal predecessors, (30183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6921 states to 6921 states and 30183 transitions. [2021-06-05 15:06:21,143 INFO L78 Accepts]: Start accepts. Automaton has 6921 states and 30183 transitions. Word has length 33 [2021-06-05 15:06:21,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:21,143 INFO L482 AbstractCegarLoop]: Abstraction has 6921 states and 30183 transitions. [2021-06-05 15:06:21,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:21,143 INFO L276 IsEmpty]: Start isEmpty. Operand 6921 states and 30183 transitions. [2021-06-05 15:06:21,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:21,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:21,154 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, 1, 1, 1] [2021-06-05 15:06:21,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:21,355 INFO L430 AbstractCegarLoop]: === Iteration 160 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:21,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2104888460, now seen corresponding path program 79 times [2021-06-05 15:06:21,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:21,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987375508] [2021-06-05 15:06:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:21,517 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 15:06:21,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:21,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987375508] [2021-06-05 15:06:21,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987375508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:21,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375507804] [2021-06-05 15:06:21,517 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 15:06:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:21,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:21,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:21,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 15:06:21,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:21,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:21,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:21,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:06:21,799 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 15:06:21,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375507804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:21,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:21,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:06:21,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037765467] [2021-06-05 15:06:21,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:06:21,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:21,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:06:21,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:21,800 INFO L87 Difference]: Start difference. First operand 6921 states and 30183 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:23,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:23,071 INFO L93 Difference]: Finished difference Result 7735 states and 33462 transitions. [2021-06-05 15:06:23,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:06:23,072 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:23,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:23,089 INFO L225 Difference]: With dead ends: 7735 [2021-06-05 15:06:23,089 INFO L226 Difference]: Without dead ends: 7720 [2021-06-05 15:06:23,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 799.1ms TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:06:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7720 states. [2021-06-05 15:06:23,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7720 to 6921. [2021-06-05 15:06:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6921 states, 6920 states have (on average 4.3621387283237) internal successors, (30186), 6920 states have internal predecessors, (30186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6921 states to 6921 states and 30186 transitions. [2021-06-05 15:06:23,207 INFO L78 Accepts]: Start accepts. Automaton has 6921 states and 30186 transitions. Word has length 33 [2021-06-05 15:06:23,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:23,207 INFO L482 AbstractCegarLoop]: Abstraction has 6921 states and 30186 transitions. [2021-06-05 15:06:23,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:23,207 INFO L276 IsEmpty]: Start isEmpty. Operand 6921 states and 30186 transitions. [2021-06-05 15:06:23,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:23,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:23,219 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, 1, 1, 1] [2021-06-05 15:06:23,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:23,419 INFO L430 AbstractCegarLoop]: === Iteration 161 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:23,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:23,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1248804492, now seen corresponding path program 80 times [2021-06-05 15:06:23,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:23,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110957969] [2021-06-05 15:06:23,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:23,586 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 15:06:23,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:23,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110957969] [2021-06-05 15:06:23,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110957969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:23,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146623058] [2021-06-05 15:06:23,586 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 15:06:23,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:23,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:23,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:23,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:23,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:23,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:23,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:23,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:23,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:23,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:06:23,970 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 15:06:23,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146623058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:23,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:23,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:06:23,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256399963] [2021-06-05 15:06:23,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:06:23,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:23,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:06:23,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:06:23,971 INFO L87 Difference]: Start difference. First operand 6921 states and 30186 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:24,854 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-06-05 15:06:26,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:26,403 INFO L93 Difference]: Finished difference Result 7947 states and 34282 transitions. [2021-06-05 15:06:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:06:26,404 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:26,422 INFO L225 Difference]: With dead ends: 7947 [2021-06-05 15:06:26,422 INFO L226 Difference]: Without dead ends: 7928 [2021-06-05 15:06:26,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 2171.2ms TimeCoverageRelationStatistics Valid=425, Invalid=2227, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:06:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7928 states. [2021-06-05 15:06:26,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7928 to 7007. [2021-06-05 15:06:26,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7007 states, 7006 states have (on average 4.363260062803311) internal successors, (30569), 7006 states have internal predecessors, (30569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:26,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 30569 transitions. [2021-06-05 15:06:26,585 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 30569 transitions. Word has length 33 [2021-06-05 15:06:26,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:26,585 INFO L482 AbstractCegarLoop]: Abstraction has 7007 states and 30569 transitions. [2021-06-05 15:06:26,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:26,585 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 30569 transitions. [2021-06-05 15:06:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:26,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:26,597 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, 1, 1, 1] [2021-06-05 15:06:26,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 15:06:26,797 INFO L430 AbstractCegarLoop]: === Iteration 162 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:26,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:26,798 INFO L82 PathProgramCache]: Analyzing trace with hash 54468114, now seen corresponding path program 81 times [2021-06-05 15:06:26,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:26,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640375577] [2021-06-05 15:06:26,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:26,948 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 15:06:26,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:26,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640375577] [2021-06-05 15:06:26,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640375577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:26,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224639672] [2021-06-05 15:06:26,949 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 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 15:06:26,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:06:26,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:26,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:26,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:27,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:27,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:27,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:27,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:27,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:27,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:06:27,325 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 15:06:27,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224639672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:27,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:27,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:06:27,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431650346] [2021-06-05 15:06:27,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:06:27,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:27,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:06:27,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:06:27,326 INFO L87 Difference]: Start difference. First operand 7007 states and 30569 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:29,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:29,172 INFO L93 Difference]: Finished difference Result 7712 states and 33332 transitions. [2021-06-05 15:06:29,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:06:29,173 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:29,190 INFO L225 Difference]: With dead ends: 7712 [2021-06-05 15:06:29,190 INFO L226 Difference]: Without dead ends: 7699 [2021-06-05 15:06:29,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1668.8ms TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:06:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7699 states. [2021-06-05 15:06:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7699 to 6991. [2021-06-05 15:06:29,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 6990 states have (on average 4.365951359084407) internal successors, (30518), 6990 states have internal predecessors, (30518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 30518 transitions. [2021-06-05 15:06:29,309 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 30518 transitions. Word has length 33 [2021-06-05 15:06:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:29,309 INFO L482 AbstractCegarLoop]: Abstraction has 6991 states and 30518 transitions. [2021-06-05 15:06:29,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 30518 transitions. [2021-06-05 15:06:29,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:29,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:29,320 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, 1, 1, 1] [2021-06-05 15:06:29,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 15:06:29,521 INFO L430 AbstractCegarLoop]: === Iteration 163 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:29,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:29,521 INFO L82 PathProgramCache]: Analyzing trace with hash -844893958, now seen corresponding path program 82 times [2021-06-05 15:06:29,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:29,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016850262] [2021-06-05 15:06:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:29,684 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 15:06:29,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:29,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016850262] [2021-06-05 15:06:29,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016850262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:29,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070746899] [2021-06-05 15:06:29,685 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 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 15:06:29,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:29,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:29,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:29,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:29,836 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 15:06:29,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:29,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:29,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:29,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 15:06:29,990 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 15:06:29,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070746899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:29,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:29,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:06:29,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46424832] [2021-06-05 15:06:29,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:06:29,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:29,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:06:29,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:29,991 INFO L87 Difference]: Start difference. First operand 6991 states and 30518 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:31,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:31,432 INFO L93 Difference]: Finished difference Result 8547 states and 36564 transitions. [2021-06-05 15:06:31,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:06:31,432 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:31,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:31,452 INFO L225 Difference]: With dead ends: 8547 [2021-06-05 15:06:31,452 INFO L226 Difference]: Without dead ends: 8517 [2021-06-05 15:06:31,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1191.2ms TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:06:31,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8517 states. [2021-06-05 15:06:31,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8517 to 7100. [2021-06-05 15:06:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7100 states, 7099 states have (on average 4.368643470911396) internal successors, (31013), 7099 states have internal predecessors, (31013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7100 states to 7100 states and 31013 transitions. [2021-06-05 15:06:31,582 INFO L78 Accepts]: Start accepts. Automaton has 7100 states and 31013 transitions. Word has length 33 [2021-06-05 15:06:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:31,582 INFO L482 AbstractCegarLoop]: Abstraction has 7100 states and 31013 transitions. [2021-06-05 15:06:31,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 7100 states and 31013 transitions. [2021-06-05 15:06:31,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:31,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:31,594 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, 1, 1, 1] [2021-06-05 15:06:31,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 15:06:31,794 INFO L430 AbstractCegarLoop]: === Iteration 164 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:31,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1081594, now seen corresponding path program 83 times [2021-06-05 15:06:31,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:31,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632819778] [2021-06-05 15:06:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:31,949 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 15:06:31,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:31,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632819778] [2021-06-05 15:06:31,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632819778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:31,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420019463] [2021-06-05 15:06:31,949 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 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 15:06:31,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:06:31,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:31,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:31,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:32,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:32,100 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 29 treesize of output 13 [2021-06-05 15:06:32,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:32,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:32,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:32,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:06:32,188 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 15:06:32,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420019463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:32,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:32,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:06:32,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996845860] [2021-06-05 15:06:32,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:06:32,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:32,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:06:32,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:06:32,189 INFO L87 Difference]: Start difference. First operand 7100 states and 31013 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:06:33,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:33,209 INFO L93 Difference]: Finished difference Result 8299 states and 35564 transitions. [2021-06-05 15:06:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:06:33,209 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 15:06:33,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:33,227 INFO L225 Difference]: With dead ends: 8299 [2021-06-05 15:06:33,227 INFO L226 Difference]: Without dead ends: 8262 [2021-06-05 15:06:33,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 815.2ms TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:06:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8262 states. [2021-06-05 15:06:33,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8262 to 7060. [2021-06-05 15:06:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7060 states, 7059 states have (on average 4.370307408981442) internal successors, (30850), 7059 states have internal predecessors, (30850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 30850 transitions. [2021-06-05 15:06:33,397 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 30850 transitions. Word has length 33 [2021-06-05 15:06:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:33,397 INFO L482 AbstractCegarLoop]: Abstraction has 7060 states and 30850 transitions. [2021-06-05 15:06:33,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:06:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 30850 transitions. [2021-06-05 15:06:33,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:33,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:33,409 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, 1, 1, 1] [2021-06-05 15:06:33,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:33,613 INFO L430 AbstractCegarLoop]: === Iteration 165 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:33,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:33,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2063910690, now seen corresponding path program 84 times [2021-06-05 15:06:33,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:33,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402257966] [2021-06-05 15:06:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:33,797 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 15:06:33,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:33,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402257966] [2021-06-05 15:06:33,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402257966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:33,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112557644] [2021-06-05 15:06:33,798 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 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 15:06:33,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:06:33,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:33,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 15:06:33,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:33,958 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 21 treesize of output 13 [2021-06-05 15:06:33,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:33,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:33,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:33,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-06-05 15:06:34,111 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 15:06:34,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112557644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:34,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:34,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:06:34,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342204496] [2021-06-05 15:06:34,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:06:34,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:34,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:06:34,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:06:34,112 INFO L87 Difference]: Start difference. First operand 7060 states and 30850 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:35,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:35,810 INFO L93 Difference]: Finished difference Result 8289 states and 35705 transitions. [2021-06-05 15:06:35,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:06:35,811 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:35,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:35,830 INFO L225 Difference]: With dead ends: 8289 [2021-06-05 15:06:35,830 INFO L226 Difference]: Without dead ends: 8245 [2021-06-05 15:06:35,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1207.8ms TimeCoverageRelationStatistics Valid=350, Invalid=2512, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:06:35,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8245 states. [2021-06-05 15:06:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8245 to 7090. [2021-06-05 15:06:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7090 states, 7089 states have (on average 4.370856256171534) internal successors, (30985), 7089 states have internal predecessors, (30985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7090 states to 7090 states and 30985 transitions. [2021-06-05 15:06:35,947 INFO L78 Accepts]: Start accepts. Automaton has 7090 states and 30985 transitions. Word has length 33 [2021-06-05 15:06:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:35,947 INFO L482 AbstractCegarLoop]: Abstraction has 7090 states and 30985 transitions. [2021-06-05 15:06:35,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 7090 states and 30985 transitions. [2021-06-05 15:06:35,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:35,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:35,958 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, 1, 1, 1] [2021-06-05 15:06:36,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 15:06:36,159 INFO L430 AbstractCegarLoop]: === Iteration 166 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:36,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:36,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1015138288, now seen corresponding path program 85 times [2021-06-05 15:06:36,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:36,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143748475] [2021-06-05 15:06:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:36,326 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 15:06:36,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:36,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143748475] [2021-06-05 15:06:36,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143748475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:36,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586224130] [2021-06-05 15:06:36,326 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 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 15:06:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:36,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:36,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:36,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:36,477 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 29 treesize of output 13 [2021-06-05 15:06:36,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:36,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:36,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:36,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:06:36,566 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 15:06:36,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586224130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:36,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:36,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:06:36,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029350599] [2021-06-05 15:06:36,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:36,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:36,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:36,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:36,567 INFO L87 Difference]: Start difference. First operand 7090 states and 30985 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:38,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:38,055 INFO L93 Difference]: Finished difference Result 8643 states and 37010 transitions. [2021-06-05 15:06:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:06:38,055 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:38,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:38,075 INFO L225 Difference]: With dead ends: 8643 [2021-06-05 15:06:38,075 INFO L226 Difference]: Without dead ends: 8605 [2021-06-05 15:06:38,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1313.4ms TimeCoverageRelationStatistics Valid=490, Invalid=2480, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:06:38,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8605 states. [2021-06-05 15:06:38,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8605 to 7267. [2021-06-05 15:06:38,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7267 states, 7266 states have (on average 4.376548307184145) internal successors, (31800), 7266 states have internal predecessors, (31800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7267 states to 7267 states and 31800 transitions. [2021-06-05 15:06:38,211 INFO L78 Accepts]: Start accepts. Automaton has 7267 states and 31800 transitions. Word has length 33 [2021-06-05 15:06:38,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:38,211 INFO L482 AbstractCegarLoop]: Abstraction has 7267 states and 31800 transitions. [2021-06-05 15:06:38,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:38,211 INFO L276 IsEmpty]: Start isEmpty. Operand 7267 states and 31800 transitions. [2021-06-05 15:06:38,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:38,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:38,224 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, 1, 1, 1] [2021-06-05 15:06:38,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 15:06:38,424 INFO L430 AbstractCegarLoop]: === Iteration 167 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:38,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1976556402, now seen corresponding path program 86 times [2021-06-05 15:06:38,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:38,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201981012] [2021-06-05 15:06:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:38,598 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 15:06:38,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:38,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201981012] [2021-06-05 15:06:38,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201981012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:38,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330345640] [2021-06-05 15:06:38,598 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 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 15:06:38,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:38,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:38,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:38,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:38,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:38,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:38,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:38,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:38,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:38,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:06:38,967 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 15:06:38,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330345640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:38,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:38,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:06:38,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731741928] [2021-06-05 15:06:38,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:06:38,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:38,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:06:38,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:06:38,968 INFO L87 Difference]: Start difference. First operand 7267 states and 31800 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:40,664 INFO L93 Difference]: Finished difference Result 8050 states and 34800 transitions. [2021-06-05 15:06:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:06:40,665 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:40,683 INFO L225 Difference]: With dead ends: 8050 [2021-06-05 15:06:40,683 INFO L226 Difference]: Without dead ends: 8037 [2021-06-05 15:06:40,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1518.2ms TimeCoverageRelationStatistics Valid=376, Invalid=1880, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:06:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8037 states. [2021-06-05 15:06:40,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8037 to 7267. [2021-06-05 15:06:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7267 states, 7266 states have (on average 4.376135425268373) internal successors, (31797), 7266 states have internal predecessors, (31797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:40,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7267 states to 7267 states and 31797 transitions. [2021-06-05 15:06:40,803 INFO L78 Accepts]: Start accepts. Automaton has 7267 states and 31797 transitions. Word has length 33 [2021-06-05 15:06:40,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:40,803 INFO L482 AbstractCegarLoop]: Abstraction has 7267 states and 31797 transitions. [2021-06-05 15:06:40,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:40,804 INFO L276 IsEmpty]: Start isEmpty. Operand 7267 states and 31797 transitions. [2021-06-05 15:06:40,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:40,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:40,815 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, 1, 1, 1] [2021-06-05 15:06:41,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:41,016 INFO L430 AbstractCegarLoop]: === Iteration 168 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:41,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1419048822, now seen corresponding path program 87 times [2021-06-05 15:06:41,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:41,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380214779] [2021-06-05 15:06:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:41,205 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 15:06:41,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:41,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380214779] [2021-06-05 15:06:41,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380214779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:41,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301886541] [2021-06-05 15:06:41,205 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 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 15:06:41,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:06:41,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:41,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:06:41,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:41,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:41,442 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:06:41,443 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 29 treesize of output 57 [2021-06-05 15:06:41,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:41,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:41,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:41,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 15:06:41,661 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 15:06:41,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301886541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:41,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:41,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:06:41,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598931186] [2021-06-05 15:06:41,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:06:41,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:41,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:06:41,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:06:41,662 INFO L87 Difference]: Start difference. First operand 7267 states and 31797 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:43,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:43,278 INFO L93 Difference]: Finished difference Result 8408 states and 36272 transitions. [2021-06-05 15:06:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:06:43,278 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:43,297 INFO L225 Difference]: With dead ends: 8408 [2021-06-05 15:06:43,297 INFO L226 Difference]: Without dead ends: 8372 [2021-06-05 15:06:43,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1325.5ms TimeCoverageRelationStatistics Valid=328, Invalid=2428, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:06:43,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8372 states. [2021-06-05 15:06:43,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8372 to 7412. [2021-06-05 15:06:43,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 4.383618944811766) internal successors, (32487), 7411 states have internal predecessors, (32487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:43,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 32487 transitions. [2021-06-05 15:06:43,423 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 32487 transitions. Word has length 33 [2021-06-05 15:06:43,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:43,423 INFO L482 AbstractCegarLoop]: Abstraction has 7412 states and 32487 transitions. [2021-06-05 15:06:43,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 32487 transitions. [2021-06-05 15:06:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:43,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:43,436 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, 1, 1, 1] [2021-06-05 15:06:43,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:43,636 INFO L430 AbstractCegarLoop]: === Iteration 169 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:43,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1534370608, now seen corresponding path program 88 times [2021-06-05 15:06:43,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:43,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719395888] [2021-06-05 15:06:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:43,808 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 15:06:43,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:43,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719395888] [2021-06-05 15:06:43,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719395888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:43,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073547565] [2021-06-05 15:06:43,808 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 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 15:06:43,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:43,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:43,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:43,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:44,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:44,069 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 29 treesize of output 13 [2021-06-05 15:06:44,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:44,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:44,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:44,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:06:44,163 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 15:06:44,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073547565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:44,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:44,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:06:44,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753469196] [2021-06-05 15:06:44,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:44,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:44,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:44,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:44,164 INFO L87 Difference]: Start difference. First operand 7412 states and 32487 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:45,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:45,733 INFO L93 Difference]: Finished difference Result 8537 states and 36866 transitions. [2021-06-05 15:06:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:06:45,734 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:45,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:45,754 INFO L225 Difference]: With dead ends: 8537 [2021-06-05 15:06:45,754 INFO L226 Difference]: Without dead ends: 8499 [2021-06-05 15:06:45,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1229.1ms TimeCoverageRelationStatistics Valid=305, Invalid=2047, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:06:45,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8499 states. [2021-06-05 15:06:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8499 to 7415. [2021-06-05 15:06:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7415 states, 7414 states have (on average 4.383193957377934) internal successors, (32497), 7414 states have internal predecessors, (32497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:45,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7415 states to 7415 states and 32497 transitions. [2021-06-05 15:06:45,891 INFO L78 Accepts]: Start accepts. Automaton has 7415 states and 32497 transitions. Word has length 33 [2021-06-05 15:06:45,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:45,891 INFO L482 AbstractCegarLoop]: Abstraction has 7415 states and 32497 transitions. [2021-06-05 15:06:45,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:45,891 INFO L276 IsEmpty]: Start isEmpty. Operand 7415 states and 32497 transitions. [2021-06-05 15:06:45,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:45,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:45,904 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, 1, 1, 1] [2021-06-05 15:06:46,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 15:06:46,104 INFO L430 AbstractCegarLoop]: === Iteration 170 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:46,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:46,105 INFO L82 PathProgramCache]: Analyzing trace with hash 599548178, now seen corresponding path program 89 times [2021-06-05 15:06:46,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:46,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385864626] [2021-06-05 15:06:46,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:46,261 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 15:06:46,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:46,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385864626] [2021-06-05 15:06:46,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385864626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:46,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238158496] [2021-06-05 15:06:46,261 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 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 15:06:46,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:06:46,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:46,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:46,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:46,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:46,418 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 29 treesize of output 13 [2021-06-05 15:06:46,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:46,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:46,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:46,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:06:46,514 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 15:06:46,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238158496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:46,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:46,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:06:46,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687215320] [2021-06-05 15:06:46,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:46,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:46,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:46,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:46,515 INFO L87 Difference]: Start difference. First operand 7415 states and 32497 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:47,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:47,625 INFO L93 Difference]: Finished difference Result 8337 states and 35978 transitions. [2021-06-05 15:06:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:06:47,625 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:47,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:47,643 INFO L225 Difference]: With dead ends: 8337 [2021-06-05 15:06:47,644 INFO L226 Difference]: Without dead ends: 8315 [2021-06-05 15:06:47,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 934.5ms TimeCoverageRelationStatistics Valid=296, Invalid=1684, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:06:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8315 states. [2021-06-05 15:06:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8315 to 7403. [2021-06-05 15:06:47,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7403 states, 7402 states have (on average 4.384085382329101) internal successors, (32451), 7402 states have internal predecessors, (32451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:47,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7403 states to 7403 states and 32451 transitions. [2021-06-05 15:06:47,769 INFO L78 Accepts]: Start accepts. Automaton has 7403 states and 32451 transitions. Word has length 33 [2021-06-05 15:06:47,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:47,769 INFO L482 AbstractCegarLoop]: Abstraction has 7403 states and 32451 transitions. [2021-06-05 15:06:47,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:47,769 INFO L276 IsEmpty]: Start isEmpty. Operand 7403 states and 32451 transitions. [2021-06-05 15:06:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:47,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:47,781 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, 1, 1, 1] [2021-06-05 15:06:47,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:47,981 INFO L430 AbstractCegarLoop]: === Iteration 171 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:47,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:47,982 INFO L82 PathProgramCache]: Analyzing trace with hash 697235702, now seen corresponding path program 90 times [2021-06-05 15:06:47,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:47,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56788656] [2021-06-05 15:06:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:48,166 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 15:06:48,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:48,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56788656] [2021-06-05 15:06:48,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56788656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:48,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609435982] [2021-06-05 15:06:48,167 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 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 15:06:48,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:06:48,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:48,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:48,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:48,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:48,362 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:06:48,362 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 29 treesize of output 57 [2021-06-05 15:06:48,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:48,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:48,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:48,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 15:06:48,589 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 15:06:48,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609435982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:48,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:48,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:06:48,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108832902] [2021-06-05 15:06:48,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:06:48,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:48,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:06:48,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:06:48,590 INFO L87 Difference]: Start difference. First operand 7403 states and 32451 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:50,051 INFO L93 Difference]: Finished difference Result 8214 states and 35625 transitions. [2021-06-05 15:06:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:06:50,052 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:50,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:50,070 INFO L225 Difference]: With dead ends: 8214 [2021-06-05 15:06:50,070 INFO L226 Difference]: Without dead ends: 8196 [2021-06-05 15:06:50,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1237.7ms TimeCoverageRelationStatistics Valid=370, Invalid=2180, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:06:50,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8196 states. [2021-06-05 15:06:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8196 to 7433. [2021-06-05 15:06:50,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7432 states have (on average 4.3850914962325085) internal successors, (32590), 7432 states have internal predecessors, (32590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 32590 transitions. [2021-06-05 15:06:50,191 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 32590 transitions. Word has length 33 [2021-06-05 15:06:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:50,191 INFO L482 AbstractCegarLoop]: Abstraction has 7433 states and 32590 transitions. [2021-06-05 15:06:50,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 32590 transitions. [2021-06-05 15:06:50,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:50,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:50,204 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, 1, 1, 1] [2021-06-05 15:06:50,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 15:06:50,404 INFO L430 AbstractCegarLoop]: === Iteration 172 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:50,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:50,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1466267072, now seen corresponding path program 91 times [2021-06-05 15:06:50,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:50,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005511244] [2021-06-05 15:06:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:50,641 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 15:06:50,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:50,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005511244] [2021-06-05 15:06:50,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005511244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:50,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371782456] [2021-06-05 15:06:50,642 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 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 15:06:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:50,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:50,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:50,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:50,867 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 29 treesize of output 13 [2021-06-05 15:06:50,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:50,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:50,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:50,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:06:50,963 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 15:06:50,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371782456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:50,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:50,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:06:50,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31032879] [2021-06-05 15:06:50,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:06:50,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:50,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:06:50,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:50,964 INFO L87 Difference]: Start difference. First operand 7433 states and 32590 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:52,724 INFO L93 Difference]: Finished difference Result 9052 states and 38657 transitions. [2021-06-05 15:06:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:06:52,724 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:06:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:52,745 INFO L225 Difference]: With dead ends: 9052 [2021-06-05 15:06:52,745 INFO L226 Difference]: Without dead ends: 9006 [2021-06-05 15:06:52,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1590.5ms TimeCoverageRelationStatistics Valid=426, Invalid=2024, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:06:52,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9006 states. [2021-06-05 15:06:52,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9006 to 7635. [2021-06-05 15:06:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7635 states, 7634 states have (on average 4.387346083311501) internal successors, (33493), 7634 states have internal predecessors, (33493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7635 states to 7635 states and 33493 transitions. [2021-06-05 15:06:52,888 INFO L78 Accepts]: Start accepts. Automaton has 7635 states and 33493 transitions. Word has length 33 [2021-06-05 15:06:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:52,888 INFO L482 AbstractCegarLoop]: Abstraction has 7635 states and 33493 transitions. [2021-06-05 15:06:52,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand 7635 states and 33493 transitions. [2021-06-05 15:06:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:52,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:52,900 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, 1, 1, 1] [2021-06-05 15:06:53,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:53,101 INFO L430 AbstractCegarLoop]: === Iteration 173 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:53,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1982724672, now seen corresponding path program 92 times [2021-06-05 15:06:53,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:53,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378186554] [2021-06-05 15:06:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:53,364 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 15:06:53,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:53,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378186554] [2021-06-05 15:06:53,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378186554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:53,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103404322] [2021-06-05 15:06:53,365 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 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 15:06:53,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:53,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:53,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:53,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:53,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:53,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 15:06:53,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:53,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:53,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:53,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 15:06:53,799 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 15:06:53,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103404322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:53,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:53,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:06:53,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160594646] [2021-06-05 15:06:53,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:06:53,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:53,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:06:53,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:06:53,800 INFO L87 Difference]: Start difference. First operand 7635 states and 33493 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 15:06:53,966 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-05 15:06:54,108 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-06-05 15:06:54,510 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 15:06:57,447 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-05 15:06:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:57,632 INFO L93 Difference]: Finished difference Result 9884 states and 40976 transitions. [2021-06-05 15:06:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 15:06:57,632 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 15:06:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:57,653 INFO L225 Difference]: With dead ends: 9884 [2021-06-05 15:06:57,653 INFO L226 Difference]: Without dead ends: 9823 [2021-06-05 15:06:57,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 3507.9ms TimeCoverageRelationStatistics Valid=766, Invalid=4490, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:06:57,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9823 states. [2021-06-05 15:06:57,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9823 to 7619. [2021-06-05 15:06:57,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7619 states, 7618 states have (on average 4.385271724862169) internal successors, (33407), 7618 states have internal predecessors, (33407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7619 states to 7619 states and 33407 transitions. [2021-06-05 15:06:57,792 INFO L78 Accepts]: Start accepts. Automaton has 7619 states and 33407 transitions. Word has length 33 [2021-06-05 15:06:57,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:57,792 INFO L482 AbstractCegarLoop]: Abstraction has 7619 states and 33407 transitions. [2021-06-05 15:06:57,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 15:06:57,792 INFO L276 IsEmpty]: Start isEmpty. Operand 7619 states and 33407 transitions. [2021-06-05 15:06:57,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:06:57,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:57,804 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, 1, 1, 1] [2021-06-05 15:06:58,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 15:06:58,005 INFO L430 AbstractCegarLoop]: === Iteration 174 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:58,005 INFO L82 PathProgramCache]: Analyzing trace with hash 80104424, now seen corresponding path program 93 times [2021-06-05 15:06:58,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:58,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921598282] [2021-06-05 15:06:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:58,221 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 15:06:58,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:58,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921598282] [2021-06-05 15:06:58,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921598282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:58,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487330822] [2021-06-05 15:06:58,221 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 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 15:06:58,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:06:58,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:58,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:06:58,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:58,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:58,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:58,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:58,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:58,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:58,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:06:58,690 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 15:06:58,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487330822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:58,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:58,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:06:58,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077908549] [2021-06-05 15:06:58,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:06:58,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:58,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:06:58,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:06:58,691 INFO L87 Difference]: Start difference. First operand 7619 states and 33407 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:58,993 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 15:07:00,064 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-06-05 15:07:01,613 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 15:07:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:01,949 INFO L93 Difference]: Finished difference Result 9547 states and 39936 transitions. [2021-06-05 15:07:01,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:07:01,950 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:07:01,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:01,970 INFO L225 Difference]: With dead ends: 9547 [2021-06-05 15:07:01,971 INFO L226 Difference]: Without dead ends: 9489 [2021-06-05 15:07:01,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 2688.0ms TimeCoverageRelationStatistics Valid=466, Invalid=3566, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:07:01,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9489 states. [2021-06-05 15:07:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9489 to 7622. [2021-06-05 15:07:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7622 states, 7621 states have (on average 4.383939115601627) internal successors, (33410), 7621 states have internal predecessors, (33410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7622 states to 7622 states and 33410 transitions. [2021-06-05 15:07:02,165 INFO L78 Accepts]: Start accepts. Automaton has 7622 states and 33410 transitions. Word has length 33 [2021-06-05 15:07:02,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:02,165 INFO L482 AbstractCegarLoop]: Abstraction has 7622 states and 33410 transitions. [2021-06-05 15:07:02,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:02,165 INFO L276 IsEmpty]: Start isEmpty. Operand 7622 states and 33410 transitions. [2021-06-05 15:07:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:02,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:02,177 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, 1, 1, 1] [2021-06-05 15:07:02,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:02,377 INFO L430 AbstractCegarLoop]: === Iteration 175 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:02,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:02,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2130270074, now seen corresponding path program 94 times [2021-06-05 15:07:02,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:02,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60456534] [2021-06-05 15:07:02,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:02,605 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 15:07:02,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:02,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60456534] [2021-06-05 15:07:02,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60456534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:02,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124588804] [2021-06-05 15:07:02,605 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 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 15:07:02,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:02,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:02,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:07:02,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:02,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:02,763 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 29 treesize of output 13 [2021-06-05 15:07:02,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:02,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:02,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:02,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:07:02,855 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 15:07:02,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124588804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:02,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:02,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:07:02,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257746134] [2021-06-05 15:07:02,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:02,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:02,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:02,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:02,856 INFO L87 Difference]: Start difference. First operand 7622 states and 33410 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:07:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:04,496 INFO L93 Difference]: Finished difference Result 9325 states and 39002 transitions. [2021-06-05 15:07:04,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:07:04,496 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:07:04,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:04,517 INFO L225 Difference]: With dead ends: 9325 [2021-06-05 15:07:04,517 INFO L226 Difference]: Without dead ends: 9285 [2021-06-05 15:07:04,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1422.3ms TimeCoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:07:04,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9285 states. [2021-06-05 15:07:04,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9285 to 7617. [2021-06-05 15:07:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7617 states, 7616 states have (on average 4.384322478991597) internal successors, (33391), 7616 states have internal predecessors, (33391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:04,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7617 states to 7617 states and 33391 transitions. [2021-06-05 15:07:04,658 INFO L78 Accepts]: Start accepts. Automaton has 7617 states and 33391 transitions. Word has length 33 [2021-06-05 15:07:04,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:04,658 INFO L482 AbstractCegarLoop]: Abstraction has 7617 states and 33391 transitions. [2021-06-05 15:07:04,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:07:04,658 INFO L276 IsEmpty]: Start isEmpty. Operand 7617 states and 33391 transitions. [2021-06-05 15:07:04,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:04,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:04,671 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, 1, 1, 1] [2021-06-05 15:07:04,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 15:07:04,871 INFO L430 AbstractCegarLoop]: === Iteration 176 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:04,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:04,871 INFO L82 PathProgramCache]: Analyzing trace with hash -564757444, now seen corresponding path program 95 times [2021-06-05 15:07:04,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:04,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230295209] [2021-06-05 15:07:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:05,117 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 15:07:05,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:05,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230295209] [2021-06-05 15:07:05,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230295209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:05,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779145982] [2021-06-05 15:07:05,117 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 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 15:07:05,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:07:05,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:05,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:07:05,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:05,287 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 15:07:05,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:05,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:05,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:05,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 15:07:05,391 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 15:07:05,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779145982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:05,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:05,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:07:05,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489132496] [2021-06-05 15:07:05,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:05,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:05,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:05,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:05,392 INFO L87 Difference]: Start difference. First operand 7617 states and 33391 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:05,801 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 15:07:07,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:07,540 INFO L93 Difference]: Finished difference Result 9249 states and 39615 transitions. [2021-06-05 15:07:07,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:07:07,540 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:07:07,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:07,561 INFO L225 Difference]: With dead ends: 9249 [2021-06-05 15:07:07,561 INFO L226 Difference]: Without dead ends: 9194 [2021-06-05 15:07:07,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1892.1ms TimeCoverageRelationStatistics Valid=499, Invalid=2581, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:07:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9194 states. [2021-06-05 15:07:07,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9194 to 7786. [2021-06-05 15:07:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7786 states, 7785 states have (on average 4.383815028901734) internal successors, (34128), 7785 states have internal predecessors, (34128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7786 states to 7786 states and 34128 transitions. [2021-06-05 15:07:07,703 INFO L78 Accepts]: Start accepts. Automaton has 7786 states and 34128 transitions. Word has length 33 [2021-06-05 15:07:07,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:07,704 INFO L482 AbstractCegarLoop]: Abstraction has 7786 states and 34128 transitions. [2021-06-05 15:07:07,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:07,704 INFO L276 IsEmpty]: Start isEmpty. Operand 7786 states and 34128 transitions. [2021-06-05 15:07:07,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:07,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:07,717 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, 1, 1, 1] [2021-06-05 15:07:07,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:07,917 INFO L430 AbstractCegarLoop]: === Iteration 177 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:07,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:07,917 INFO L82 PathProgramCache]: Analyzing trace with hash 281218108, now seen corresponding path program 96 times [2021-06-05 15:07:07,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:07,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667021769] [2021-06-05 15:07:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:08,137 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 15:07:08,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:08,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667021769] [2021-06-05 15:07:08,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667021769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:08,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59644696] [2021-06-05 15:07:08,137 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 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 15:07:08,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:07:08,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:08,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:07:08,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:08,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:08,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:08,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:08,291 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 23 treesize of output 31 [2021-06-05 15:07:08,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:08,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:08,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:08,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:07:08,456 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 15:07:08,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59644696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:08,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:08,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:07:08,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867555152] [2021-06-05 15:07:08,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:07:08,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:08,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:07:08,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:07:08,457 INFO L87 Difference]: Start difference. First operand 7786 states and 34128 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 15:07:10,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:10,827 INFO L93 Difference]: Finished difference Result 9842 states and 40877 transitions. [2021-06-05 15:07:10,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:07:10,827 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 15:07:10,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:10,849 INFO L225 Difference]: With dead ends: 9842 [2021-06-05 15:07:10,849 INFO L226 Difference]: Without dead ends: 9781 [2021-06-05 15:07:10,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1998.9ms TimeCoverageRelationStatistics Valid=580, Invalid=3202, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:07:10,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9781 states. [2021-06-05 15:07:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9781 to 7727. [2021-06-05 15:07:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7727 states, 7726 states have (on average 4.382863059798084) internal successors, (33862), 7726 states have internal predecessors, (33862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7727 states to 7727 states and 33862 transitions. [2021-06-05 15:07:10,996 INFO L78 Accepts]: Start accepts. Automaton has 7727 states and 33862 transitions. Word has length 33 [2021-06-05 15:07:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:10,996 INFO L482 AbstractCegarLoop]: Abstraction has 7727 states and 33862 transitions. [2021-06-05 15:07:10,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 15:07:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 7727 states and 33862 transitions. [2021-06-05 15:07:11,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:11,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:11,009 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, 1, 1, 1] [2021-06-05 15:07:11,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-05 15:07:11,209 INFO L430 AbstractCegarLoop]: === Iteration 178 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:11,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:11,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1013033082, now seen corresponding path program 97 times [2021-06-05 15:07:11,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:11,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944796163] [2021-06-05 15:07:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:11,374 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 15:07:11,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:11,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944796163] [2021-06-05 15:07:11,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944796163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:11,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443513264] [2021-06-05 15:07:11,375 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 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 15:07:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:11,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:07:11,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:11,521 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 15:07:11,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:11,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:11,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:11,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 15:07:11,610 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 15:07:11,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443513264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:11,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:11,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:07:11,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856893567] [2021-06-05 15:07:11,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:11,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:11,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:11,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:11,611 INFO L87 Difference]: Start difference. First operand 7727 states and 33862 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:12,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:12,829 INFO L93 Difference]: Finished difference Result 8661 states and 37445 transitions. [2021-06-05 15:07:12,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:07:12,829 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:07:12,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:12,849 INFO L225 Difference]: With dead ends: 8661 [2021-06-05 15:07:12,849 INFO L226 Difference]: Without dead ends: 8579 [2021-06-05 15:07:12,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1032.5ms TimeCoverageRelationStatistics Valid=326, Invalid=1744, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:07:12,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8579 states. [2021-06-05 15:07:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8579 to 7712. [2021-06-05 15:07:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7712 states, 7711 states have (on average 4.384515627026326) internal successors, (33809), 7711 states have internal predecessors, (33809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:13,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7712 states to 7712 states and 33809 transitions. [2021-06-05 15:07:13,020 INFO L78 Accepts]: Start accepts. Automaton has 7712 states and 33809 transitions. Word has length 33 [2021-06-05 15:07:13,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:13,020 INFO L482 AbstractCegarLoop]: Abstraction has 7712 states and 33809 transitions. [2021-06-05 15:07:13,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:13,020 INFO L276 IsEmpty]: Start isEmpty. Operand 7712 states and 33809 transitions. [2021-06-05 15:07:13,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:13,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:13,033 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, 1, 1, 1] [2021-06-05 15:07:13,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 15:07:13,233 INFO L430 AbstractCegarLoop]: === Iteration 179 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:13,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1100992010, now seen corresponding path program 98 times [2021-06-05 15:07:13,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:13,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22139430] [2021-06-05 15:07:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:13,388 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 15:07:13,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22139430] [2021-06-05 15:07:13,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22139430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536782148] [2021-06-05 15:07:13,388 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 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 15:07:13,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:13,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:13,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:07:13,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:13,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:13,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:07:13,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:13,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:13,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:13,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 15:07:13,731 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 15:07:13,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536782148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:13,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:13,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 15:07:13,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108568223] [2021-06-05 15:07:13,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:13,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:13,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:13,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:13,732 INFO L87 Difference]: Start difference. First operand 7712 states and 33809 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) 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 15:07:15,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:15,375 INFO L93 Difference]: Finished difference Result 8666 states and 37399 transitions. [2021-06-05 15:07:15,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:07:15,376 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 33 [2021-06-05 15:07:15,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:15,396 INFO L225 Difference]: With dead ends: 8666 [2021-06-05 15:07:15,396 INFO L226 Difference]: Without dead ends: 8648 [2021-06-05 15:07:15,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1242.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:07:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8648 states. [2021-06-05 15:07:15,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8648 to 7712. [2021-06-05 15:07:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7712 states, 7711 states have (on average 4.383607832965893) internal successors, (33802), 7711 states have internal predecessors, (33802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7712 states to 7712 states and 33802 transitions. [2021-06-05 15:07:15,527 INFO L78 Accepts]: Start accepts. Automaton has 7712 states and 33802 transitions. Word has length 33 [2021-06-05 15:07:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:15,527 INFO L482 AbstractCegarLoop]: Abstraction has 7712 states and 33802 transitions. [2021-06-05 15:07:15,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 15:07:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 7712 states and 33802 transitions. [2021-06-05 15:07:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:15,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:15,540 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, 1, 1, 1] [2021-06-05 15:07:15,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 15:07:15,741 INFO L430 AbstractCegarLoop]: === Iteration 180 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:15,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:15,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1870023380, now seen corresponding path program 99 times [2021-06-05 15:07:15,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:15,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318560575] [2021-06-05 15:07:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:15,962 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 15:07:15,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:15,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318560575] [2021-06-05 15:07:15,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318560575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:15,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188517737] [2021-06-05 15:07:15,963 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 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 15:07:15,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:07:16,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:16,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:07:16,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:16,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:16,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:07:16,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:16,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:16,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:16,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 15:07:16,404 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 15:07:16,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188517737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:16,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:16,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:07:16,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911805311] [2021-06-05 15:07:16,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:07:16,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:16,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:07:16,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:07:16,405 INFO L87 Difference]: Start difference. First operand 7712 states and 33802 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:16,690 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-05 15:07:19,511 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 15:07:19,931 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-06-05 15:07:20,096 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-06-05 15:07:20,247 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 15:07:20,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:20,747 INFO L93 Difference]: Finished difference Result 9381 states and 39903 transitions. [2021-06-05 15:07:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:07:20,747 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:07:20,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:20,768 INFO L225 Difference]: With dead ends: 9381 [2021-06-05 15:07:20,768 INFO L226 Difference]: Without dead ends: 9335 [2021-06-05 15:07:20,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 3652.5ms TimeCoverageRelationStatistics Valid=711, Invalid=4545, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:07:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9335 states. [2021-06-05 15:07:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9335 to 7775. [2021-06-05 15:07:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7775 states, 7774 states have (on average 4.39104708001029) internal successors, (34136), 7774 states have internal predecessors, (34136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7775 states to 7775 states and 34136 transitions. [2021-06-05 15:07:20,900 INFO L78 Accepts]: Start accepts. Automaton has 7775 states and 34136 transitions. Word has length 33 [2021-06-05 15:07:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:20,900 INFO L482 AbstractCegarLoop]: Abstraction has 7775 states and 34136 transitions. [2021-06-05 15:07:20,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 7775 states and 34136 transitions. [2021-06-05 15:07:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:20,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:20,912 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, 1, 1, 1] [2021-06-05 15:07:21,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:21,112 INFO L430 AbstractCegarLoop]: === Iteration 181 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:21,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:21,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1578968364, now seen corresponding path program 100 times [2021-06-05 15:07:21,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:21,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582337372] [2021-06-05 15:07:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:21,331 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 15:07:21,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:21,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582337372] [2021-06-05 15:07:21,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582337372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:21,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340055706] [2021-06-05 15:07:21,332 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 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 15:07:21,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:21,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:21,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:07:21,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:21,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:21,516 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 28 treesize of output 12 [2021-06-05 15:07:21,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:21,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:21,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:21,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:07:21,588 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 15:07:21,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340055706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:21,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:21,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:07:21,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394934563] [2021-06-05 15:07:21,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:21,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:21,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:21,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:21,589 INFO L87 Difference]: Start difference. First operand 7775 states and 34136 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:07:24,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:24,852 INFO L93 Difference]: Finished difference Result 10709 states and 44029 transitions. [2021-06-05 15:07:24,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 15:07:24,853 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:07:24,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:24,885 INFO L225 Difference]: With dead ends: 10709 [2021-06-05 15:07:24,885 INFO L226 Difference]: Without dead ends: 10589 [2021-06-05 15:07:24,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 2875.3ms TimeCoverageRelationStatistics Valid=795, Invalid=4461, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:07:24,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10589 states. [2021-06-05 15:07:25,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10589 to 7771. [2021-06-05 15:07:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7771 states, 7770 states have (on average 4.385585585585585) internal successors, (34076), 7770 states have internal predecessors, (34076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7771 states to 7771 states and 34076 transitions. [2021-06-05 15:07:25,046 INFO L78 Accepts]: Start accepts. Automaton has 7771 states and 34076 transitions. Word has length 33 [2021-06-05 15:07:25,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:25,046 INFO L482 AbstractCegarLoop]: Abstraction has 7771 states and 34076 transitions. [2021-06-05 15:07:25,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:07:25,046 INFO L276 IsEmpty]: Start isEmpty. Operand 7771 states and 34076 transitions. [2021-06-05 15:07:25,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:25,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:25,059 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, 1, 1, 1] [2021-06-05 15:07:25,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 15:07:25,260 INFO L430 AbstractCegarLoop]: === Iteration 182 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:25,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:25,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1050522736, now seen corresponding path program 101 times [2021-06-05 15:07:25,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:25,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795473478] [2021-06-05 15:07:25,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:25,408 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 15:07:25,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:25,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795473478] [2021-06-05 15:07:25,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795473478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:25,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969749367] [2021-06-05 15:07:25,409 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 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 15:07:25,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:07:25,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:25,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:07:25,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:25,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:25,583 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 28 treesize of output 12 [2021-06-05 15:07:25,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:25,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:25,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:25,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:07:25,661 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 15:07:25,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969749367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:25,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:25,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:07:25,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375947300] [2021-06-05 15:07:25,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:25,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:25,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:25,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:25,662 INFO L87 Difference]: Start difference. First operand 7771 states and 34076 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:26,706 INFO L93 Difference]: Finished difference Result 8812 states and 38001 transitions. [2021-06-05 15:07:26,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:07:26,706 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:07:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:26,726 INFO L225 Difference]: With dead ends: 8812 [2021-06-05 15:07:26,726 INFO L226 Difference]: Without dead ends: 8774 [2021-06-05 15:07:26,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 804.7ms TimeCoverageRelationStatistics Valid=267, Invalid=1625, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:07:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2021-06-05 15:07:26,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 7763. [2021-06-05 15:07:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7763 states, 7762 states have (on average 4.3852099974233445) internal successors, (34038), 7762 states have internal predecessors, (34038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7763 states to 7763 states and 34038 transitions. [2021-06-05 15:07:26,865 INFO L78 Accepts]: Start accepts. Automaton has 7763 states and 34038 transitions. Word has length 33 [2021-06-05 15:07:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:26,865 INFO L482 AbstractCegarLoop]: Abstraction has 7763 states and 34038 transitions. [2021-06-05 15:07:26,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:26,865 INFO L276 IsEmpty]: Start isEmpty. Operand 7763 states and 34038 transitions. [2021-06-05 15:07:26,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:26,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:26,878 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, 1, 1, 1] [2021-06-05 15:07:27,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 15:07:27,079 INFO L430 AbstractCegarLoop]: === Iteration 183 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:27,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:27,079 INFO L82 PathProgramCache]: Analyzing trace with hash 158384902, now seen corresponding path program 102 times [2021-06-05 15:07:27,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:27,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157492442] [2021-06-05 15:07:27,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:27,271 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 15:07:27,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:27,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157492442] [2021-06-05 15:07:27,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157492442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:27,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722513376] [2021-06-05 15:07:27,271 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 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 15:07:27,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:07:27,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:27,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:07:27,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:27,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:27,542 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:07:27,542 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 27 treesize of output 55 [2021-06-05 15:07:27,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:07:27,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:27,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:27,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 15:07:27,667 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 15:07:27,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722513376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:27,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:27,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:07:27,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586293842] [2021-06-05 15:07:27,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:07:27,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:27,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:07:27,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:07:27,668 INFO L87 Difference]: Start difference. First operand 7763 states and 34038 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:29,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:29,168 INFO L93 Difference]: Finished difference Result 8447 states and 36700 transitions. [2021-06-05 15:07:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:07:29,168 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:07:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:29,187 INFO L225 Difference]: With dead ends: 8447 [2021-06-05 15:07:29,188 INFO L226 Difference]: Without dead ends: 8396 [2021-06-05 15:07:29,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1186.2ms TimeCoverageRelationStatistics Valid=216, Invalid=1946, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:07:29,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8396 states. [2021-06-05 15:07:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8396 to 7750. [2021-06-05 15:07:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7750 states, 7749 states have (on average 4.387017679700606) internal successors, (33995), 7749 states have internal predecessors, (33995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7750 states to 7750 states and 33995 transitions. [2021-06-05 15:07:29,315 INFO L78 Accepts]: Start accepts. Automaton has 7750 states and 33995 transitions. Word has length 33 [2021-06-05 15:07:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:29,315 INFO L482 AbstractCegarLoop]: Abstraction has 7750 states and 33995 transitions. [2021-06-05 15:07:29,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 7750 states and 33995 transitions. [2021-06-05 15:07:29,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:29,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:29,328 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, 1, 1, 1] [2021-06-05 15:07:29,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 15:07:29,528 INFO L430 AbstractCegarLoop]: === Iteration 184 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:29,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:29,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1106864046, now seen corresponding path program 103 times [2021-06-05 15:07:29,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:29,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450640603] [2021-06-05 15:07:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:29,690 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 15:07:29,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:29,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450640603] [2021-06-05 15:07:29,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450640603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:29,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374380720] [2021-06-05 15:07:29,690 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 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 15:07:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:29,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:07:29,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:29,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:29,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:07:29,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:29,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:29,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:29,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:07:29,936 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 15:07:29,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374380720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:29,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:29,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:07:29,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375613680] [2021-06-05 15:07:29,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:29,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:29,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:29,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:29,937 INFO L87 Difference]: Start difference. First operand 7750 states and 33995 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:07:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:31,069 INFO L93 Difference]: Finished difference Result 8748 states and 37700 transitions. [2021-06-05 15:07:31,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:07:31,069 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:07:31,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:31,088 INFO L225 Difference]: With dead ends: 8748 [2021-06-05 15:07:31,089 INFO L226 Difference]: Without dead ends: 8720 [2021-06-05 15:07:31,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 858.6ms TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:07:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8720 states. [2021-06-05 15:07:31,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8720 to 7890. [2021-06-05 15:07:31,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7890 states, 7889 states have (on average 4.385853720370136) internal successors, (34600), 7889 states have internal predecessors, (34600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:31,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7890 states to 7890 states and 34600 transitions. [2021-06-05 15:07:31,279 INFO L78 Accepts]: Start accepts. Automaton has 7890 states and 34600 transitions. Word has length 33 [2021-06-05 15:07:31,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:31,279 INFO L482 AbstractCegarLoop]: Abstraction has 7890 states and 34600 transitions. [2021-06-05 15:07:31,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:07:31,279 INFO L276 IsEmpty]: Start isEmpty. Operand 7890 states and 34600 transitions. [2021-06-05 15:07:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:31,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:31,292 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, 1, 1, 1] [2021-06-05 15:07:31,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:31,492 INFO L430 AbstractCegarLoop]: === Iteration 185 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:31,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:31,493 INFO L82 PathProgramCache]: Analyzing trace with hash -337832676, now seen corresponding path program 104 times [2021-06-05 15:07:31,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:31,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323952238] [2021-06-05 15:07:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:31,709 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 15:07:31,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:31,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323952238] [2021-06-05 15:07:31,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323952238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:31,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104169531] [2021-06-05 15:07:31,709 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 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 15:07:31,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:31,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:31,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:07:31,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:31,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:31,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:31,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:31,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:31,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:31,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:07:32,102 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 15:07:32,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104169531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:32,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:32,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:07:32,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782437362] [2021-06-05 15:07:32,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:07:32,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:32,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:07:32,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:07:32,103 INFO L87 Difference]: Start difference. First operand 7890 states and 34600 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:32,248 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 15:07:32,444 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-06-05 15:07:34,003 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-05 15:07:35,695 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 15:07:35,990 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-06-05 15:07:36,124 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 15:07:36,263 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-05 15:07:36,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:36,530 INFO L93 Difference]: Finished difference Result 9661 states and 41118 transitions. [2021-06-05 15:07:36,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:07:36,531 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:07:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:36,555 INFO L225 Difference]: With dead ends: 9661 [2021-06-05 15:07:36,555 INFO L226 Difference]: Without dead ends: 9615 [2021-06-05 15:07:36,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 3738.5ms TimeCoverageRelationStatistics Valid=613, Invalid=4217, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:07:36,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9615 states. [2021-06-05 15:07:36,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 7890. [2021-06-05 15:07:36,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7890 states, 7889 states have (on average 4.385853720370136) internal successors, (34600), 7889 states have internal predecessors, (34600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7890 states to 7890 states and 34600 transitions. [2021-06-05 15:07:36,737 INFO L78 Accepts]: Start accepts. Automaton has 7890 states and 34600 transitions. Word has length 33 [2021-06-05 15:07:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:36,737 INFO L482 AbstractCegarLoop]: Abstraction has 7890 states and 34600 transitions. [2021-06-05 15:07:36,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 7890 states and 34600 transitions. [2021-06-05 15:07:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:36,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:36,750 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, 1, 1, 1] [2021-06-05 15:07:36,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 15:07:36,951 INFO L430 AbstractCegarLoop]: === Iteration 186 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:36,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:36,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2118430978, now seen corresponding path program 105 times [2021-06-05 15:07:36,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:36,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693568607] [2021-06-05 15:07:36,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:37,174 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 15:07:37,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:37,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693568607] [2021-06-05 15:07:37,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693568607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:37,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509770042] [2021-06-05 15:07:37,175 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 15:07:37,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:07:37,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:37,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:07:37,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:37,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:37,373 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:07:37,373 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 29 treesize of output 57 [2021-06-05 15:07:37,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:37,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:37,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:37,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 15:07:37,590 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 15:07:37,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509770042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:37,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:37,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:07:37,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10789904] [2021-06-05 15:07:37,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:07:37,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:37,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:07:37,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:07:37,591 INFO L87 Difference]: Start difference. First operand 7890 states and 34600 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:39,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:39,656 INFO L93 Difference]: Finished difference Result 8926 states and 38371 transitions. [2021-06-05 15:07:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:07:39,657 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:07:39,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:39,676 INFO L225 Difference]: With dead ends: 8926 [2021-06-05 15:07:39,676 INFO L226 Difference]: Without dead ends: 8867 [2021-06-05 15:07:39,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1757.6ms TimeCoverageRelationStatistics Valid=417, Invalid=2663, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:07:39,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8867 states. [2021-06-05 15:07:39,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8867 to 7954. [2021-06-05 15:07:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7954 states, 7953 states have (on average 4.3871495033320755) internal successors, (34891), 7953 states have internal predecessors, (34891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:39,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 34891 transitions. [2021-06-05 15:07:39,867 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 34891 transitions. Word has length 33 [2021-06-05 15:07:39,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:39,867 INFO L482 AbstractCegarLoop]: Abstraction has 7954 states and 34891 transitions. [2021-06-05 15:07:39,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:39,867 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 34891 transitions. [2021-06-05 15:07:39,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:39,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:39,880 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, 1, 1, 1] [2021-06-05 15:07:40,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:40,080 INFO L430 AbstractCegarLoop]: === Iteration 187 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:40,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:40,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1723995324, now seen corresponding path program 106 times [2021-06-05 15:07:40,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:40,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428793481] [2021-06-05 15:07:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:40,293 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 15:07:40,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:40,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428793481] [2021-06-05 15:07:40,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428793481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:40,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637054748] [2021-06-05 15:07:40,294 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 15:07:40,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:40,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:40,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:07:40,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:40,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:40,459 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 29 treesize of output 13 [2021-06-05 15:07:40,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:40,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:40,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:40,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:07:40,561 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 15:07:40,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637054748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:40,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:40,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:07:40,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85398989] [2021-06-05 15:07:40,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:40,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:40,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:40,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:40,562 INFO L87 Difference]: Start difference. First operand 7954 states and 34891 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:42,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:42,406 INFO L93 Difference]: Finished difference Result 9528 states and 40289 transitions. [2021-06-05 15:07:42,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:07:42,407 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:07:42,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:42,429 INFO L225 Difference]: With dead ends: 9528 [2021-06-05 15:07:42,429 INFO L226 Difference]: Without dead ends: 9499 [2021-06-05 15:07:42,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1569.3ms TimeCoverageRelationStatistics Valid=284, Invalid=2266, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:07:42,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9499 states. [2021-06-05 15:07:42,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9499 to 7954. [2021-06-05 15:07:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7954 states, 7953 states have (on average 4.3871495033320755) internal successors, (34891), 7953 states have internal predecessors, (34891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:42,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 34891 transitions. [2021-06-05 15:07:42,569 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 34891 transitions. Word has length 33 [2021-06-05 15:07:42,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:42,569 INFO L482 AbstractCegarLoop]: Abstraction has 7954 states and 34891 transitions. [2021-06-05 15:07:42,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:42,569 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 34891 transitions. [2021-06-05 15:07:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:42,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:42,581 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, 1, 1, 1] [2021-06-05 15:07:42,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 15:07:42,782 INFO L430 AbstractCegarLoop]: === Iteration 188 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:42,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:42,782 INFO L82 PathProgramCache]: Analyzing trace with hash -2077134814, now seen corresponding path program 107 times [2021-06-05 15:07:42,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:42,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276936556] [2021-06-05 15:07:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:43,004 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 15:07:43,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:43,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276936556] [2021-06-05 15:07:43,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276936556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:43,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684949131] [2021-06-05 15:07:43,004 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 15:07:43,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:07:43,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:43,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:07:43,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:43,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:43,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:43,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:43,171 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 27 treesize of output 13 [2021-06-05 15:07:43,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:43,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:43,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:43,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:18 [2021-06-05 15:07:43,299 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 15:07:43,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684949131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:43,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:43,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:07:43,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730475630] [2021-06-05 15:07:43,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:07:43,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:43,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:07:43,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:07:43,300 INFO L87 Difference]: Start difference. First operand 7954 states and 34891 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:45,388 INFO L93 Difference]: Finished difference Result 8904 states and 38573 transitions. [2021-06-05 15:07:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:07:45,388 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:07:45,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:45,408 INFO L225 Difference]: With dead ends: 8904 [2021-06-05 15:07:45,408 INFO L226 Difference]: Without dead ends: 8838 [2021-06-05 15:07:45,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 1790.8ms TimeCoverageRelationStatistics Valid=372, Invalid=2708, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:07:45,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8838 states. [2021-06-05 15:07:45,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8838 to 7945. [2021-06-05 15:07:45,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7945 states, 7944 states have (on average 4.387839879154079) internal successors, (34857), 7944 states have internal predecessors, (34857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7945 states to 7945 states and 34857 transitions. [2021-06-05 15:07:45,554 INFO L78 Accepts]: Start accepts. Automaton has 7945 states and 34857 transitions. Word has length 33 [2021-06-05 15:07:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:45,554 INFO L482 AbstractCegarLoop]: Abstraction has 7945 states and 34857 transitions. [2021-06-05 15:07:45,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:45,554 INFO L276 IsEmpty]: Start isEmpty. Operand 7945 states and 34857 transitions. [2021-06-05 15:07:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:45,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:45,567 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, 1, 1, 1] [2021-06-05 15:07:45,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 15:07:45,767 INFO L430 AbstractCegarLoop]: === Iteration 189 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:45,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1926110104, now seen corresponding path program 108 times [2021-06-05 15:07:45,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:45,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096764018] [2021-06-05 15:07:45,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:45,989 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 15:07:45,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:45,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096764018] [2021-06-05 15:07:45,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096764018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:45,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885030334] [2021-06-05 15:07:45,990 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 15:07:46,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:07:46,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:07:46,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:46,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:46,195 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:07:46,195 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 29 treesize of output 57 [2021-06-05 15:07:46,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:46,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:46,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:46,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 15:07:46,414 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 15:07:46,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885030334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:46,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:46,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:07:46,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949094485] [2021-06-05 15:07:46,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:07:46,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:46,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:07:46,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:07:46,415 INFO L87 Difference]: Start difference. First operand 7945 states and 34857 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:48,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:48,818 INFO L93 Difference]: Finished difference Result 8820 states and 38107 transitions. [2021-06-05 15:07:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:07:48,818 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:07:48,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:48,839 INFO L225 Difference]: With dead ends: 8820 [2021-06-05 15:07:48,839 INFO L226 Difference]: Without dead ends: 8774 [2021-06-05 15:07:48,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1963.3ms TimeCoverageRelationStatistics Valid=401, Invalid=2791, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:07:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2021-06-05 15:07:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 8003. [2021-06-05 15:07:48,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8003 states, 8002 states have (on average 4.392026993251687) internal successors, (35145), 8002 states have internal predecessors, (35145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:48,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8003 states to 8003 states and 35145 transitions. [2021-06-05 15:07:48,974 INFO L78 Accepts]: Start accepts. Automaton has 8003 states and 35145 transitions. Word has length 33 [2021-06-05 15:07:48,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:48,974 INFO L482 AbstractCegarLoop]: Abstraction has 8003 states and 35145 transitions. [2021-06-05 15:07:48,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:48,974 INFO L276 IsEmpty]: Start isEmpty. Operand 8003 states and 35145 transitions. [2021-06-05 15:07:48,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:48,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:48,988 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, 1, 1, 1] [2021-06-05 15:07:49,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:49,188 INFO L430 AbstractCegarLoop]: === Iteration 190 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:49,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:49,188 INFO L82 PathProgramCache]: Analyzing trace with hash 145511802, now seen corresponding path program 109 times [2021-06-05 15:07:49,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:49,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363440224] [2021-06-05 15:07:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:49,406 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 15:07:49,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:49,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363440224] [2021-06-05 15:07:49,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363440224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:49,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325419607] [2021-06-05 15:07:49,406 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 15:07:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:49,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:07:49,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:49,557 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 15:07:49,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:49,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:49,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:49,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 15:07:49,655 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 15:07:49,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325419607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:49,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:49,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:07:49,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872801782] [2021-06-05 15:07:49,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:49,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:49,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:49,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:49,656 INFO L87 Difference]: Start difference. First operand 8003 states and 35145 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:51,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:51,629 INFO L93 Difference]: Finished difference Result 9112 states and 39289 transitions. [2021-06-05 15:07:51,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:07:51,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:07:51,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:51,650 INFO L225 Difference]: With dead ends: 9112 [2021-06-05 15:07:51,650 INFO L226 Difference]: Without dead ends: 9085 [2021-06-05 15:07:51,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1644.8ms TimeCoverageRelationStatistics Valid=512, Invalid=3028, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:07:51,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9085 states. [2021-06-05 15:07:51,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9085 to 7994. [2021-06-05 15:07:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7994 states, 7993 states have (on average 4.392593519329413) internal successors, (35110), 7993 states have internal predecessors, (35110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 35110 transitions. [2021-06-05 15:07:51,794 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 35110 transitions. Word has length 33 [2021-06-05 15:07:51,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:51,794 INFO L482 AbstractCegarLoop]: Abstraction has 7994 states and 35110 transitions. [2021-06-05 15:07:51,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:51,794 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 35110 transitions. [2021-06-05 15:07:51,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:51,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:51,807 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, 1, 1, 1] [2021-06-05 15:07:52,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:52,008 INFO L430 AbstractCegarLoop]: === Iteration 191 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:52,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1522881640, now seen corresponding path program 110 times [2021-06-05 15:07:52,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:52,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499572779] [2021-06-05 15:07:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:52,227 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 15:07:52,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:52,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499572779] [2021-06-05 15:07:52,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499572779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:52,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111389330] [2021-06-05 15:07:52,227 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 15:07:52,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:52,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:52,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:07:52,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:52,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:52,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:52,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:52,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:52,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:52,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:07:52,635 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 15:07:52,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111389330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:52,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:52,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:07:52,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771470316] [2021-06-05 15:07:52,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:07:52,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:52,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:07:52,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:07:52,636 INFO L87 Difference]: Start difference. First operand 7994 states and 35110 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 15:07:52,959 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-06-05 15:07:53,729 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-06-05 15:07:54,209 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 15:07:56,769 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 15:07:56,919 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 15:07:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:57,105 INFO L93 Difference]: Finished difference Result 10579 states and 43957 transitions. [2021-06-05 15:07:57,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 15:07:57,106 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 15:07:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:57,129 INFO L225 Difference]: With dead ends: 10579 [2021-06-05 15:07:57,129 INFO L226 Difference]: Without dead ends: 10510 [2021-06-05 15:07:57,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 3618.3ms TimeCoverageRelationStatistics Valid=777, Invalid=5385, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:07:57,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10510 states. [2021-06-05 15:07:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10510 to 7987. [2021-06-05 15:07:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7987 states, 7986 states have (on average 4.390057600801402) internal successors, (35059), 7986 states have internal predecessors, (35059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7987 states to 7987 states and 35059 transitions. [2021-06-05 15:07:57,282 INFO L78 Accepts]: Start accepts. Automaton has 7987 states and 35059 transitions. Word has length 33 [2021-06-05 15:07:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:57,283 INFO L482 AbstractCegarLoop]: Abstraction has 7987 states and 35059 transitions. [2021-06-05 15:07:57,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 15:07:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 7987 states and 35059 transitions. [2021-06-05 15:07:57,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:07:57,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:57,295 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, 1, 1, 1] [2021-06-05 15:07:57,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:57,497 INFO L430 AbstractCegarLoop]: === Iteration 192 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:57,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:57,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1477834466, now seen corresponding path program 111 times [2021-06-05 15:07:57,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:57,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919676861] [2021-06-05 15:07:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:57,765 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 15:07:57,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:57,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919676861] [2021-06-05 15:07:57,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919676861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:57,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413639525] [2021-06-05 15:07:57,767 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 15:07:57,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:07:57,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:57,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:07:57,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:57,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:57,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:57,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:57,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:57,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:57,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:07:58,177 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 15:07:58,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413639525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:58,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:58,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:07:58,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774803181] [2021-06-05 15:07:58,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:07:58,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:58,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:07:58,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:07:58,178 INFO L87 Difference]: Start difference. First operand 7987 states and 35059 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:58,350 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-05 15:07:58,998 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-06-05 15:08:00,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:00,299 INFO L93 Difference]: Finished difference Result 8667 states and 37720 transitions. [2021-06-05 15:08:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:08:00,299 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:00,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:00,318 INFO L225 Difference]: With dead ends: 8667 [2021-06-05 15:08:00,319 INFO L226 Difference]: Without dead ends: 8636 [2021-06-05 15:08:00,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1798.1ms TimeCoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:08:00,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8636 states. [2021-06-05 15:08:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8636 to 7987. [2021-06-05 15:08:00,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7987 states, 7986 states have (on average 4.390057600801402) internal successors, (35059), 7986 states have internal predecessors, (35059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7987 states to 7987 states and 35059 transitions. [2021-06-05 15:08:00,454 INFO L78 Accepts]: Start accepts. Automaton has 7987 states and 35059 transitions. Word has length 33 [2021-06-05 15:08:00,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:00,454 INFO L482 AbstractCegarLoop]: Abstraction has 7987 states and 35059 transitions. [2021-06-05 15:08:00,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand 7987 states and 35059 transitions. [2021-06-05 15:08:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:00,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:00,468 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, 1, 1, 1] [2021-06-05 15:08:00,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 15:08:00,673 INFO L430 AbstractCegarLoop]: === Iteration 193 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:00,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:00,673 INFO L82 PathProgramCache]: Analyzing trace with hash -561783982, now seen corresponding path program 112 times [2021-06-05 15:08:00,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:00,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357989037] [2021-06-05 15:08:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:00,838 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 15:08:00,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:00,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357989037] [2021-06-05 15:08:00,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357989037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:00,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363604032] [2021-06-05 15:08:00,839 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 15:08:00,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:00,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:00,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:00,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:00,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:00,994 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 29 treesize of output 13 [2021-06-05 15:08:00,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:00,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:01,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:01,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:08:01,083 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 15:08:01,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363604032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:01,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:01,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:08:01,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382453056] [2021-06-05 15:08:01,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:01,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:01,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:01,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:01,085 INFO L87 Difference]: Start difference. First operand 7987 states and 35059 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:08:02,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:02,134 INFO L93 Difference]: Finished difference Result 8641 states and 37516 transitions. [2021-06-05 15:08:02,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:08:02,134 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:08:02,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:02,154 INFO L225 Difference]: With dead ends: 8641 [2021-06-05 15:08:02,155 INFO L226 Difference]: Without dead ends: 8601 [2021-06-05 15:08:02,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 974.0ms TimeCoverageRelationStatistics Valid=322, Invalid=1748, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:08:02,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8601 states. [2021-06-05 15:08:02,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8601 to 7975. [2021-06-05 15:08:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7975 states, 7974 states have (on average 4.391647855530474) internal successors, (35019), 7974 states have internal predecessors, (35019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7975 states to 7975 states and 35019 transitions. [2021-06-05 15:08:02,278 INFO L78 Accepts]: Start accepts. Automaton has 7975 states and 35019 transitions. Word has length 33 [2021-06-05 15:08:02,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:02,278 INFO L482 AbstractCegarLoop]: Abstraction has 7975 states and 35019 transitions. [2021-06-05 15:08:02,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:08:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 7975 states and 35019 transitions. [2021-06-05 15:08:02,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:02,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:02,291 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, 1, 1, 1] [2021-06-05 15:08:02,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 15:08:02,491 INFO L430 AbstractCegarLoop]: === Iteration 194 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:02,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:02,492 INFO L82 PathProgramCache]: Analyzing trace with hash -703107738, now seen corresponding path program 113 times [2021-06-05 15:08:02,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:02,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069260248] [2021-06-05 15:08:02,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:02,647 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 15:08:02,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:02,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069260248] [2021-06-05 15:08:02,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069260248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:02,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029846383] [2021-06-05 15:08:02,648 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 15:08:02,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:08:02,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:02,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:02,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:02,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:02,824 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 28 treesize of output 12 [2021-06-05 15:08:02,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:02,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:02,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:02,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:08:02,898 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 15:08:02,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029846383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:02,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:02,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:08:02,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280842081] [2021-06-05 15:08:02,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:02,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:02,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:02,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:02,899 INFO L87 Difference]: Start difference. First operand 7975 states and 35019 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:08:03,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:03,983 INFO L93 Difference]: Finished difference Result 9412 states and 40317 transitions. [2021-06-05 15:08:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:08:03,983 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:08:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:04,004 INFO L225 Difference]: With dead ends: 9412 [2021-06-05 15:08:04,005 INFO L226 Difference]: Without dead ends: 9363 [2021-06-05 15:08:04,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 812.0ms TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:08:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9363 states. [2021-06-05 15:08:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9363 to 8172. [2021-06-05 15:08:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8172 states, 8171 states have (on average 4.393097540080774) internal successors, (35896), 8171 states have internal predecessors, (35896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8172 states to 8172 states and 35896 transitions. [2021-06-05 15:08:04,167 INFO L78 Accepts]: Start accepts. Automaton has 8172 states and 35896 transitions. Word has length 33 [2021-06-05 15:08:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:04,167 INFO L482 AbstractCegarLoop]: Abstraction has 8172 states and 35896 transitions. [2021-06-05 15:08:04,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:08:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 8172 states and 35896 transitions. [2021-06-05 15:08:04,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:04,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:04,180 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, 1, 1, 1] [2021-06-05 15:08:04,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 15:08:04,380 INFO L430 AbstractCegarLoop]: === Iteration 195 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:04,381 INFO L82 PathProgramCache]: Analyzing trace with hash 65923632, now seen corresponding path program 114 times [2021-06-05 15:08:04,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:04,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21334026] [2021-06-05 15:08:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:04,630 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 15:08:04,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:04,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21334026] [2021-06-05 15:08:04,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21334026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:04,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456080045] [2021-06-05 15:08:04,630 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 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 15:08:04,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:08:04,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:04,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:04,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:04,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:04,865 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:08:04,866 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 15:08:04,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:08:04,889 INFO L628 ElimStorePlain]: treesize reduction 43, result has 33.8 percent of original size [2021-06-05 15:08:04,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:04,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 15:08:05,023 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 15:08:05,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456080045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:05,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:05,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:08:05,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011706375] [2021-06-05 15:08:05,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:08:05,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:05,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:08:05,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:08:05,024 INFO L87 Difference]: Start difference. First operand 8172 states and 35896 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:07,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:07,676 INFO L93 Difference]: Finished difference Result 9205 states and 39642 transitions. [2021-06-05 15:08:07,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:08:07,677 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:07,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:07,697 INFO L225 Difference]: With dead ends: 9205 [2021-06-05 15:08:07,697 INFO L226 Difference]: Without dead ends: 9159 [2021-06-05 15:08:07,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 2215.8ms TimeCoverageRelationStatistics Valid=468, Invalid=3438, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:08:07,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9159 states. [2021-06-05 15:08:07,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9159 to 8172. [2021-06-05 15:08:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8172 states, 8171 states have (on average 4.393097540080774) internal successors, (35896), 8171 states have internal predecessors, (35896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8172 states to 8172 states and 35896 transitions. [2021-06-05 15:08:07,839 INFO L78 Accepts]: Start accepts. Automaton has 8172 states and 35896 transitions. Word has length 33 [2021-06-05 15:08:07,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:07,839 INFO L482 AbstractCegarLoop]: Abstraction has 8172 states and 35896 transitions. [2021-06-05 15:08:07,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:07,839 INFO L276 IsEmpty]: Start isEmpty. Operand 8172 states and 35896 transitions. [2021-06-05 15:08:07,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:07,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:07,853 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, 1, 1, 1] [2021-06-05 15:08:08,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 15:08:08,053 INFO L430 AbstractCegarLoop]: === Iteration 196 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:08,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:08,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1714674670, now seen corresponding path program 115 times [2021-06-05 15:08:08,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:08,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805630212] [2021-06-05 15:08:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:08,273 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 15:08:08,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:08,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805630212] [2021-06-05 15:08:08,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805630212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:08,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037450629] [2021-06-05 15:08:08,273 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 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 15:08:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:08,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:08,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:08,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:08,450 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 28 treesize of output 12 [2021-06-05 15:08:08,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:08,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:08,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:08,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:08:08,531 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 15:08:08,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037450629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:08,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:08,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:08:08,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881204725] [2021-06-05 15:08:08,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:08,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:08,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:08,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:08,532 INFO L87 Difference]: Start difference. First operand 8172 states and 35896 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:10,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:10,964 INFO L93 Difference]: Finished difference Result 9840 states and 42118 transitions. [2021-06-05 15:08:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:08:10,964 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:10,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:10,986 INFO L225 Difference]: With dead ends: 9840 [2021-06-05 15:08:10,986 INFO L226 Difference]: Without dead ends: 9745 [2021-06-05 15:08:10,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 1975.4ms TimeCoverageRelationStatistics Valid=570, Invalid=3590, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:08:10,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9745 states. [2021-06-05 15:08:11,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9745 to 8071. [2021-06-05 15:08:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8071 states, 8070 states have (on average 4.395786864931846) internal successors, (35474), 8070 states have internal predecessors, (35474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8071 states to 8071 states and 35474 transitions. [2021-06-05 15:08:11,130 INFO L78 Accepts]: Start accepts. Automaton has 8071 states and 35474 transitions. Word has length 33 [2021-06-05 15:08:11,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:11,130 INFO L482 AbstractCegarLoop]: Abstraction has 8071 states and 35474 transitions. [2021-06-05 15:08:11,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:11,131 INFO L276 IsEmpty]: Start isEmpty. Operand 8071 states and 35474 transitions. [2021-06-05 15:08:11,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:11,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:11,144 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, 1, 1, 1] [2021-06-05 15:08:11,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:11,344 INFO L430 AbstractCegarLoop]: === Iteration 197 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:11,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:11,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1645714846, now seen corresponding path program 116 times [2021-06-05 15:08:11,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:11,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583304439] [2021-06-05 15:08:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:11,503 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 15:08:11,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:11,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583304439] [2021-06-05 15:08:11,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583304439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:11,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707881999] [2021-06-05 15:08:11,504 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 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 15:08:11,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:11,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:11,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:11,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:11,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:11,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-06-05 15:08:11,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:11,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:11,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:11,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-05 15:08:11,931 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 15:08:11,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707881999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:11,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:11,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:08:11,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939713796] [2021-06-05 15:08:11,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:08:11,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:11,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:08:11,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:08:11,932 INFO L87 Difference]: Start difference. First operand 8071 states and 35474 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:13,635 INFO L93 Difference]: Finished difference Result 9017 states and 39364 transitions. [2021-06-05 15:08:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:08:13,635 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:13,657 INFO L225 Difference]: With dead ends: 9017 [2021-06-05 15:08:13,657 INFO L226 Difference]: Without dead ends: 8966 [2021-06-05 15:08:13,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1419.7ms TimeCoverageRelationStatistics Valid=262, Invalid=1900, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:08:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8966 states. [2021-06-05 15:08:13,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8966 to 8053. [2021-06-05 15:08:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8053 states, 8052 states have (on average 4.3977893691008445) internal successors, (35411), 8052 states have internal predecessors, (35411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8053 states to 8053 states and 35411 transitions. [2021-06-05 15:08:13,793 INFO L78 Accepts]: Start accepts. Automaton has 8053 states and 35411 transitions. Word has length 33 [2021-06-05 15:08:13,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:13,794 INFO L482 AbstractCegarLoop]: Abstraction has 8053 states and 35411 transitions. [2021-06-05 15:08:13,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:13,794 INFO L276 IsEmpty]: Start isEmpty. Operand 8053 states and 35411 transitions. [2021-06-05 15:08:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:13,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:13,807 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, 1, 1, 1] [2021-06-05 15:08:14,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:14,008 INFO L430 AbstractCegarLoop]: === Iteration 198 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:14,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:14,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1608053292, now seen corresponding path program 117 times [2021-06-05 15:08:14,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:14,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102391472] [2021-06-05 15:08:14,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:14,172 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 15:08:14,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:14,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102391472] [2021-06-05 15:08:14,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102391472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:14,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186884249] [2021-06-05 15:08:14,172 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 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 15:08:14,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:08:14,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:14,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:14,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:14,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:14,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:14,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:14,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:14,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:14,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 15:08:14,542 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 15:08:14,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186884249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:14,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:14,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:08:14,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576427302] [2021-06-05 15:08:14,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:08:14,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:14,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:08:14,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:08:14,543 INFO L87 Difference]: Start difference. First operand 8053 states and 35411 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 15:08:16,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:16,034 INFO L93 Difference]: Finished difference Result 8755 states and 37999 transitions. [2021-06-05 15:08:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:08:16,034 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 15:08:16,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:16,055 INFO L225 Difference]: With dead ends: 8755 [2021-06-05 15:08:16,055 INFO L226 Difference]: Without dead ends: 8737 [2021-06-05 15:08:16,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1177.0ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:08:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8737 states. [2021-06-05 15:08:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8737 to 8046. [2021-06-05 15:08:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8046 states, 8045 states have (on average 4.399254195152269) internal successors, (35392), 8045 states have internal predecessors, (35392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8046 states to 8046 states and 35392 transitions. [2021-06-05 15:08:16,192 INFO L78 Accepts]: Start accepts. Automaton has 8046 states and 35392 transitions. Word has length 33 [2021-06-05 15:08:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:16,192 INFO L482 AbstractCegarLoop]: Abstraction has 8046 states and 35392 transitions. [2021-06-05 15:08:16,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 15:08:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 8046 states and 35392 transitions. [2021-06-05 15:08:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:16,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:16,205 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, 1, 1, 1] [2021-06-05 15:08:16,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 15:08:16,405 INFO L430 AbstractCegarLoop]: === Iteration 199 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:16,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:16,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1917882634, now seen corresponding path program 118 times [2021-06-05 15:08:16,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:16,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771058979] [2021-06-05 15:08:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:16,629 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 15:08:16,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:16,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771058979] [2021-06-05 15:08:16,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771058979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:16,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598743998] [2021-06-05 15:08:16,630 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 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 15:08:16,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:16,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:16,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:16,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:16,806 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 15:08:16,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:16,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:16,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:16,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:08:16,888 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 15:08:16,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598743998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:16,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:16,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:08:16,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753161945] [2021-06-05 15:08:16,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:16,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:16,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:16,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:16,889 INFO L87 Difference]: Start difference. First operand 8046 states and 35392 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:17,700 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 15:08:20,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:20,195 INFO L93 Difference]: Finished difference Result 9591 states and 41459 transitions. [2021-06-05 15:08:20,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 15:08:20,195 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:20,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:20,217 INFO L225 Difference]: With dead ends: 9591 [2021-06-05 15:08:20,217 INFO L226 Difference]: Without dead ends: 9559 [2021-06-05 15:08:20,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2746.1ms TimeCoverageRelationStatistics Valid=658, Invalid=4312, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 15:08:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9559 states. [2021-06-05 15:08:20,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9559 to 8046. [2021-06-05 15:08:20,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8046 states, 8045 states have (on average 4.399254195152269) internal successors, (35392), 8045 states have internal predecessors, (35392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:20,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8046 states to 8046 states and 35392 transitions. [2021-06-05 15:08:20,352 INFO L78 Accepts]: Start accepts. Automaton has 8046 states and 35392 transitions. Word has length 33 [2021-06-05 15:08:20,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:20,352 INFO L482 AbstractCegarLoop]: Abstraction has 8046 states and 35392 transitions. [2021-06-05 15:08:20,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:20,352 INFO L276 IsEmpty]: Start isEmpty. Operand 8046 states and 35392 transitions. [2021-06-05 15:08:20,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:20,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:20,366 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, 1, 1, 1] [2021-06-05 15:08:20,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 15:08:20,566 INFO L430 AbstractCegarLoop]: === Iteration 200 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:20,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1071907082, now seen corresponding path program 119 times [2021-06-05 15:08:20,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:20,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477240369] [2021-06-05 15:08:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:20,770 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 15:08:20,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:20,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477240369] [2021-06-05 15:08:20,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477240369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:20,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689996417] [2021-06-05 15:08:20,770 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 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 15:08:20,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:08:20,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:20,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:20,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:20,963 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 15:08:20,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:20,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:20,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:20,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:08:21,036 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 15:08:21,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689996417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:21,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:21,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:08:21,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136364028] [2021-06-05 15:08:21,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:21,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:21,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:21,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:21,037 INFO L87 Difference]: Start difference. First operand 8046 states and 35392 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:08:21,617 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-05 15:08:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:24,433 INFO L93 Difference]: Finished difference Result 10365 states and 43303 transitions. [2021-06-05 15:08:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:08:24,434 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:08:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:24,457 INFO L225 Difference]: With dead ends: 10365 [2021-06-05 15:08:24,457 INFO L226 Difference]: Without dead ends: 10235 [2021-06-05 15:08:24,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 2953.3ms TimeCoverageRelationStatistics Valid=666, Invalid=4164, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:08:24,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10235 states. [2021-06-05 15:08:24,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 7976. [2021-06-05 15:08:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7976 states, 7975 states have (on average 4.3993730407523515) internal successors, (35085), 7975 states have internal predecessors, (35085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:24,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7976 states to 7976 states and 35085 transitions. [2021-06-05 15:08:24,605 INFO L78 Accepts]: Start accepts. Automaton has 7976 states and 35085 transitions. Word has length 33 [2021-06-05 15:08:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:24,605 INFO L482 AbstractCegarLoop]: Abstraction has 7976 states and 35085 transitions. [2021-06-05 15:08:24,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:08:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 7976 states and 35085 transitions. [2021-06-05 15:08:24,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:24,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:24,618 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, 1, 1, 1] [2021-06-05 15:08:24,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 15:08:24,819 INFO L430 AbstractCegarLoop]: === Iteration 201 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:24,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:24,819 INFO L82 PathProgramCache]: Analyzing trace with hash 665446184, now seen corresponding path program 120 times [2021-06-05 15:08:24,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:24,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433715690] [2021-06-05 15:08:24,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:24,981 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 15:08:24,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:24,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433715690] [2021-06-05 15:08:24,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433715690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:24,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182630625] [2021-06-05 15:08:24,982 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 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 15:08:25,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:08:25,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:25,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:25,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:25,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:25,250 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:08:25,250 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 27 treesize of output 55 [2021-06-05 15:08:25,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:08:25,280 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-06-05 15:08:25,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:25,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 15:08:25,392 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 15:08:25,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182630625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:25,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:25,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:08:25,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701323339] [2021-06-05 15:08:25,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:08:25,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:25,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:08:25,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:08:25,393 INFO L87 Difference]: Start difference. First operand 7976 states and 35085 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:26,925 INFO L93 Difference]: Finished difference Result 8468 states and 36902 transitions. [2021-06-05 15:08:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:08:26,925 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:26,944 INFO L225 Difference]: With dead ends: 8468 [2021-06-05 15:08:26,944 INFO L226 Difference]: Without dead ends: 8417 [2021-06-05 15:08:26,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1237.4ms TimeCoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:08:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8417 states. [2021-06-05 15:08:27,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8417 to 7958. [2021-06-05 15:08:27,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7958 states, 7957 states have (on average 4.399019731054418) internal successors, (35003), 7957 states have internal predecessors, (35003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7958 states to 7958 states and 35003 transitions. [2021-06-05 15:08:27,074 INFO L78 Accepts]: Start accepts. Automaton has 7958 states and 35003 transitions. Word has length 33 [2021-06-05 15:08:27,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:27,074 INFO L482 AbstractCegarLoop]: Abstraction has 7958 states and 35003 transitions. [2021-06-05 15:08:27,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:27,075 INFO L276 IsEmpty]: Start isEmpty. Operand 7958 states and 35003 transitions. [2021-06-05 15:08:27,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:27,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:27,087 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, 1, 1, 1] [2021-06-05 15:08:27,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:27,288 INFO L430 AbstractCegarLoop]: === Iteration 202 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:27,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:27,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1926090286, now seen corresponding path program 121 times [2021-06-05 15:08:27,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:27,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783423971] [2021-06-05 15:08:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:27,457 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 15:08:27,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:27,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783423971] [2021-06-05 15:08:27,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783423971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:27,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990209710] [2021-06-05 15:08:27,458 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 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 15:08:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:27,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:27,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:27,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:27,660 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 28 treesize of output 12 [2021-06-05 15:08:27,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:27,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:27,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:27,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:08:27,740 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 15:08:27,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990209710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:27,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:27,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:08:27,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939094619] [2021-06-05 15:08:27,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:27,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:27,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:27,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:27,741 INFO L87 Difference]: Start difference. First operand 7958 states and 35003 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:29,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:29,196 INFO L93 Difference]: Finished difference Result 8499 states and 37144 transitions. [2021-06-05 15:08:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:08:29,197 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:29,216 INFO L225 Difference]: With dead ends: 8499 [2021-06-05 15:08:29,216 INFO L226 Difference]: Without dead ends: 8446 [2021-06-05 15:08:29,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1240.4ms TimeCoverageRelationStatistics Valid=236, Invalid=1744, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:08:29,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2021-06-05 15:08:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 7944. [2021-06-05 15:08:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7944 states, 7943 states have (on average 4.401107893742918) internal successors, (34958), 7943 states have internal predecessors, (34958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:29,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7944 states to 7944 states and 34958 transitions. [2021-06-05 15:08:29,343 INFO L78 Accepts]: Start accepts. Automaton has 7944 states and 34958 transitions. Word has length 33 [2021-06-05 15:08:29,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:29,343 INFO L482 AbstractCegarLoop]: Abstraction has 7944 states and 34958 transitions. [2021-06-05 15:08:29,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:29,343 INFO L276 IsEmpty]: Start isEmpty. Operand 7944 states and 34958 transitions. [2021-06-05 15:08:29,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:29,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:29,356 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, 1, 1, 1] [2021-06-05 15:08:29,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:29,556 INFO L430 AbstractCegarLoop]: === Iteration 203 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:29,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:29,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1157717600, now seen corresponding path program 122 times [2021-06-05 15:08:29,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:29,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128246213] [2021-06-05 15:08:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:29,730 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 15:08:29,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:29,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128246213] [2021-06-05 15:08:29,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128246213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:29,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851583815] [2021-06-05 15:08:29,730 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 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 15:08:29,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:29,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:29,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:08:29,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:29,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:29,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:29,920 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 24 treesize of output 30 [2021-06-05 15:08:29,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:29,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:29,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:29,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 15:08:30,078 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 15:08:30,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851583815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:30,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:30,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:08:30,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009712873] [2021-06-05 15:08:30,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:08:30,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:30,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:08:30,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:08:30,079 INFO L87 Difference]: Start difference. First operand 7944 states and 34958 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:31,373 INFO L93 Difference]: Finished difference Result 8675 states and 37858 transitions. [2021-06-05 15:08:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:08:31,373 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:31,393 INFO L225 Difference]: With dead ends: 8675 [2021-06-05 15:08:31,393 INFO L226 Difference]: Without dead ends: 8656 [2021-06-05 15:08:31,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 983.9ms TimeCoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:08:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8656 states. [2021-06-05 15:08:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8656 to 8069. [2021-06-05 15:08:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8069 states, 8068 states have (on average 4.405428854734755) internal successors, (35543), 8068 states have internal predecessors, (35543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8069 states to 8069 states and 35543 transitions. [2021-06-05 15:08:31,525 INFO L78 Accepts]: Start accepts. Automaton has 8069 states and 35543 transitions. Word has length 33 [2021-06-05 15:08:31,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:31,525 INFO L482 AbstractCegarLoop]: Abstraction has 8069 states and 35543 transitions. [2021-06-05 15:08:31,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:31,525 INFO L276 IsEmpty]: Start isEmpty. Operand 8069 states and 35543 transitions. [2021-06-05 15:08:31,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:31,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:31,538 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, 1, 1, 1] [2021-06-05 15:08:31,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:31,739 INFO L430 AbstractCegarLoop]: === Iteration 204 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:31,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:31,739 INFO L82 PathProgramCache]: Analyzing trace with hash 145555006, now seen corresponding path program 123 times [2021-06-05 15:08:31,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:31,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632950331] [2021-06-05 15:08:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:31,906 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 15:08:31,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:31,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632950331] [2021-06-05 15:08:31,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632950331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:31,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914723617] [2021-06-05 15:08:31,907 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 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 15:08:31,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:08:31,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:31,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:31,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:32,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:32,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:32,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:32,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:32,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:32,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 15:08:32,280 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 15:08:32,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914723617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:32,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:32,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:08:32,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732893610] [2021-06-05 15:08:32,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:08:32,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:32,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:08:32,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:08:32,281 INFO L87 Difference]: Start difference. First operand 8069 states and 35543 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:33,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:33,623 INFO L93 Difference]: Finished difference Result 8675 states and 37818 transitions. [2021-06-05 15:08:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:08:33,623 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:33,643 INFO L225 Difference]: With dead ends: 8675 [2021-06-05 15:08:33,643 INFO L226 Difference]: Without dead ends: 8666 [2021-06-05 15:08:33,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1167.2ms TimeCoverageRelationStatistics Valid=297, Invalid=1425, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:08:33,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8666 states. [2021-06-05 15:08:33,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8666 to 8072. [2021-06-05 15:08:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 4.404410853673647) internal successors, (35548), 8071 states have internal predecessors, (35548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:33,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 35548 transitions. [2021-06-05 15:08:33,795 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 35548 transitions. Word has length 33 [2021-06-05 15:08:33,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:33,795 INFO L482 AbstractCegarLoop]: Abstraction has 8072 states and 35548 transitions. [2021-06-05 15:08:33,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:33,795 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 35548 transitions. [2021-06-05 15:08:33,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:33,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:33,808 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, 1, 1, 1] [2021-06-05 15:08:34,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:34,009 INFO L430 AbstractCegarLoop]: === Iteration 205 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:34,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1522838436, now seen corresponding path program 124 times [2021-06-05 15:08:34,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:34,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015723326] [2021-06-05 15:08:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:34,208 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 15:08:34,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:34,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015723326] [2021-06-05 15:08:34,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015723326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:34,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452488910] [2021-06-05 15:08:34,208 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 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 15:08:34,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:34,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:34,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:34,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:34,398 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 15:08:34,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:34,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:34,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:34,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:08:34,486 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 15:08:34,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452488910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:34,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:34,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:08:34,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644604408] [2021-06-05 15:08:34,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:34,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:34,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:34,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:34,488 INFO L87 Difference]: Start difference. First operand 8072 states and 35548 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:08:35,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:35,529 INFO L93 Difference]: Finished difference Result 8952 states and 38982 transitions. [2021-06-05 15:08:35,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:08:35,529 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:08:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:35,550 INFO L225 Difference]: With dead ends: 8952 [2021-06-05 15:08:35,550 INFO L226 Difference]: Without dead ends: 8938 [2021-06-05 15:08:35,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 788.8ms TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:08:35,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8938 states. [2021-06-05 15:08:35,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8938 to 8071. [2021-06-05 15:08:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8071 states, 8070 states have (on average 4.40458488228005) internal successors, (35545), 8070 states have internal predecessors, (35545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:35,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8071 states to 8071 states and 35545 transitions. [2021-06-05 15:08:35,701 INFO L78 Accepts]: Start accepts. Automaton has 8071 states and 35545 transitions. Word has length 33 [2021-06-05 15:08:35,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:35,701 INFO L482 AbstractCegarLoop]: Abstraction has 8071 states and 35545 transitions. [2021-06-05 15:08:35,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:08:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 8071 states and 35545 transitions. [2021-06-05 15:08:35,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:35,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:35,714 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, 1, 1, 1] [2021-06-05 15:08:35,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 15:08:35,915 INFO L430 AbstractCegarLoop]: === Iteration 206 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:35,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:35,915 INFO L82 PathProgramCache]: Analyzing trace with hash -753807066, now seen corresponding path program 125 times [2021-06-05 15:08:35,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:35,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491465425] [2021-06-05 15:08:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:36,088 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 15:08:36,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:36,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491465425] [2021-06-05 15:08:36,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491465425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:36,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728093153] [2021-06-05 15:08:36,089 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 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 15:08:36,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:08:36,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:36,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:36,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:36,278 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 15:08:36,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:36,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:36,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:36,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:08:36,360 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 15:08:36,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728093153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:36,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:36,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:08:36,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209528899] [2021-06-05 15:08:36,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:36,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:36,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:36,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:36,361 INFO L87 Difference]: Start difference. First operand 8071 states and 35545 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:38,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:38,076 INFO L93 Difference]: Finished difference Result 9264 states and 40322 transitions. [2021-06-05 15:08:38,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:08:38,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:38,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:38,098 INFO L225 Difference]: With dead ends: 9264 [2021-06-05 15:08:38,098 INFO L226 Difference]: Without dead ends: 9236 [2021-06-05 15:08:38,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1369.4ms TimeCoverageRelationStatistics Valid=343, Invalid=2309, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:08:38,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9236 states. [2021-06-05 15:08:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9236 to 8034. [2021-06-05 15:08:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8034 states, 8033 states have (on average 4.406199427362131) internal successors, (35395), 8033 states have internal predecessors, (35395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:38,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8034 states to 8034 states and 35395 transitions. [2021-06-05 15:08:38,246 INFO L78 Accepts]: Start accepts. Automaton has 8034 states and 35395 transitions. Word has length 33 [2021-06-05 15:08:38,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:38,246 INFO L482 AbstractCegarLoop]: Abstraction has 8034 states and 35395 transitions. [2021-06-05 15:08:38,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:38,246 INFO L276 IsEmpty]: Start isEmpty. Operand 8034 states and 35395 transitions. [2021-06-05 15:08:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:38,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:38,259 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, 1, 1, 1] [2021-06-05 15:08:38,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 15:08:38,459 INFO L430 AbstractCegarLoop]: === Iteration 207 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:38,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:38,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2139969714, now seen corresponding path program 126 times [2021-06-05 15:08:38,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:38,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282008870] [2021-06-05 15:08:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:38,631 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 15:08:38,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:38,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282008870] [2021-06-05 15:08:38,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282008870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:38,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858318328] [2021-06-05 15:08:38,632 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 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 15:08:38,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:08:38,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:38,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:38,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:38,889 INFO L354 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2021-06-05 15:08:38,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 65 [2021-06-05 15:08:38,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:38,969 INFO L628 ElimStorePlain]: treesize reduction 38, result has 63.5 percent of original size [2021-06-05 15:08:38,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:38,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:66 [2021-06-05 15:08:39,192 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 15:08:39,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858318328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:39,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:39,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:08:39,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574496747] [2021-06-05 15:08:39,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:08:39,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:39,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:08:39,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:08:39,193 INFO L87 Difference]: Start difference. First operand 8034 states and 35395 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:40,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:40,992 INFO L93 Difference]: Finished difference Result 8486 states and 37152 transitions. [2021-06-05 15:08:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:08:40,992 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:41,011 INFO L225 Difference]: With dead ends: 8486 [2021-06-05 15:08:41,012 INFO L226 Difference]: Without dead ends: 8471 [2021-06-05 15:08:41,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1499.6ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:08:41,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8471 states. [2021-06-05 15:08:41,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8471 to 8022. [2021-06-05 15:08:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8021 states have (on average 4.407056476748535) internal successors, (35349), 8021 states have internal predecessors, (35349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 35349 transitions. [2021-06-05 15:08:41,187 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 35349 transitions. Word has length 33 [2021-06-05 15:08:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:41,187 INFO L482 AbstractCegarLoop]: Abstraction has 8022 states and 35349 transitions. [2021-06-05 15:08:41,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 35349 transitions. [2021-06-05 15:08:41,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:41,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:41,200 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, 1, 1, 1] [2021-06-05 15:08:41,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:41,401 INFO L430 AbstractCegarLoop]: === Iteration 208 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:41,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:41,401 INFO L82 PathProgramCache]: Analyzing trace with hash -64513948, now seen corresponding path program 127 times [2021-06-05 15:08:41,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:41,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171950880] [2021-06-05 15:08:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:41,578 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 15:08:41,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:41,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171950880] [2021-06-05 15:08:41,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171950880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:41,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782156983] [2021-06-05 15:08:41,578 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 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 15:08:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:41,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:41,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:41,804 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 15:08:41,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:41,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:41,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:41,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:08:41,869 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 15:08:41,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782156983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:41,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:41,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:08:41,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992849794] [2021-06-05 15:08:41,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:41,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:41,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:41,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:41,870 INFO L87 Difference]: Start difference. First operand 8022 states and 35349 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:43,247 INFO L93 Difference]: Finished difference Result 8656 states and 37855 transitions. [2021-06-05 15:08:43,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:08:43,247 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:43,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:43,268 INFO L225 Difference]: With dead ends: 8656 [2021-06-05 15:08:43,268 INFO L226 Difference]: Without dead ends: 8641 [2021-06-05 15:08:43,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 993.7ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:08:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8641 states. [2021-06-05 15:08:43,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8641 to 8022. [2021-06-05 15:08:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8021 states have (on average 4.407056476748535) internal successors, (35349), 8021 states have internal predecessors, (35349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 35349 transitions. [2021-06-05 15:08:43,419 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 35349 transitions. Word has length 33 [2021-06-05 15:08:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:43,419 INFO L482 AbstractCegarLoop]: Abstraction has 8022 states and 35349 transitions. [2021-06-05 15:08:43,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 35349 transitions. [2021-06-05 15:08:43,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:43,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:43,434 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, 1, 1, 1] [2021-06-05 15:08:43,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:43,634 INFO L430 AbstractCegarLoop]: === Iteration 209 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:43,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:43,634 INFO L82 PathProgramCache]: Analyzing trace with hash 369515398, now seen corresponding path program 128 times [2021-06-05 15:08:43,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:43,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406369982] [2021-06-05 15:08:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:43,834 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 15:08:43,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:43,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406369982] [2021-06-05 15:08:43,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406369982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:43,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700053991] [2021-06-05 15:08:43,835 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 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 15:08:43,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:43,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:43,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:08:43,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:44,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:44,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:44,106 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 24 treesize of output 30 [2021-06-05 15:08:44,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:44,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:44,129 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 15:08:44,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:54 [2021-06-05 15:08:44,326 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 15:08:44,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700053991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:44,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:44,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:08:44,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011722107] [2021-06-05 15:08:44,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:08:44,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:44,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:08:44,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:08:44,327 INFO L87 Difference]: Start difference. First operand 8022 states and 35349 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:45,196 INFO L93 Difference]: Finished difference Result 8467 states and 37017 transitions. [2021-06-05 15:08:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:08:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:45,222 INFO L225 Difference]: With dead ends: 8467 [2021-06-05 15:08:45,222 INFO L226 Difference]: Without dead ends: 8452 [2021-06-05 15:08:45,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 885.2ms TimeCoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:08:45,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2021-06-05 15:08:45,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8010. [2021-06-05 15:08:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8010 states, 8009 states have (on average 4.40704207766263) internal successors, (35296), 8009 states have internal predecessors, (35296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:45,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8010 states to 8010 states and 35296 transitions. [2021-06-05 15:08:45,422 INFO L78 Accepts]: Start accepts. Automaton has 8010 states and 35296 transitions. Word has length 33 [2021-06-05 15:08:45,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:45,423 INFO L482 AbstractCegarLoop]: Abstraction has 8010 states and 35296 transitions. [2021-06-05 15:08:45,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 8010 states and 35296 transitions. [2021-06-05 15:08:45,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:45,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:45,435 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, 1, 1, 1] [2021-06-05 15:08:45,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:45,636 INFO L430 AbstractCegarLoop]: === Iteration 210 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:45,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:45,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1374121620, now seen corresponding path program 129 times [2021-06-05 15:08:45,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:45,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200545728] [2021-06-05 15:08:45,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:45,846 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 15:08:45,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:45,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200545728] [2021-06-05 15:08:45,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200545728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:45,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90209987] [2021-06-05 15:08:45,846 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 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 15:08:45,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:08:45,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:08:45,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:46,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:46,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:46,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:46,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:46,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:46,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:08:46,255 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 15:08:46,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90209987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:46,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:46,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:08:46,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987299613] [2021-06-05 15:08:46,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:08:46,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:46,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:08:46,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:08:46,256 INFO L87 Difference]: Start difference. First operand 8010 states and 35296 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:47,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:47,059 INFO L93 Difference]: Finished difference Result 8275 states and 36314 transitions. [2021-06-05 15:08:47,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:08:47,060 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:47,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:47,078 INFO L225 Difference]: With dead ends: 8275 [2021-06-05 15:08:47,079 INFO L226 Difference]: Without dead ends: 8260 [2021-06-05 15:08:47,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 621.9ms TimeCoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:08:47,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2021-06-05 15:08:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 8012. [2021-06-05 15:08:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8012 states, 8011 states have (on average 4.406815628510798) internal successors, (35303), 8011 states have internal predecessors, (35303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8012 states to 8012 states and 35303 transitions. [2021-06-05 15:08:47,208 INFO L78 Accepts]: Start accepts. Automaton has 8012 states and 35303 transitions. Word has length 33 [2021-06-05 15:08:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:47,208 INFO L482 AbstractCegarLoop]: Abstraction has 8012 states and 35303 transitions. [2021-06-05 15:08:47,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 8012 states and 35303 transitions. [2021-06-05 15:08:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:47,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:47,221 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, 1, 1, 1] [2021-06-05 15:08:47,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 15:08:47,422 INFO L430 AbstractCegarLoop]: === Iteration 211 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:47,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:47,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1004725780, now seen corresponding path program 130 times [2021-06-05 15:08:47,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:47,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037309019] [2021-06-05 15:08:47,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:47,611 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 15:08:47,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:47,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037309019] [2021-06-05 15:08:47,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037309019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:47,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518935938] [2021-06-05 15:08:47,612 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 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 15:08:47,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:47,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:47,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:47,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:47,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:47,817 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 28 treesize of output 12 [2021-06-05 15:08:47,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:47,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:47,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:47,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:08:47,901 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 15:08:47,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518935938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:47,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:47,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:08:47,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59152930] [2021-06-05 15:08:47,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:47,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:47,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:47,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:47,902 INFO L87 Difference]: Start difference. First operand 8012 states and 35303 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:49,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:49,323 INFO L93 Difference]: Finished difference Result 8665 states and 37936 transitions. [2021-06-05 15:08:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:08:49,324 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:49,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:49,344 INFO L225 Difference]: With dead ends: 8665 [2021-06-05 15:08:49,344 INFO L226 Difference]: Without dead ends: 8650 [2021-06-05 15:08:49,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1101.3ms TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:08:49,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8650 states. [2021-06-05 15:08:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8650 to 8004. [2021-06-05 15:08:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8004 states, 8003 states have (on average 4.407847057353492) internal successors, (35276), 8003 states have internal predecessors, (35276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:49,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8004 states to 8004 states and 35276 transitions. [2021-06-05 15:08:49,536 INFO L78 Accepts]: Start accepts. Automaton has 8004 states and 35276 transitions. Word has length 33 [2021-06-05 15:08:49,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:49,536 INFO L482 AbstractCegarLoop]: Abstraction has 8004 states and 35276 transitions. [2021-06-05 15:08:49,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:49,536 INFO L276 IsEmpty]: Start isEmpty. Operand 8004 states and 35276 transitions. [2021-06-05 15:08:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:49,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:49,549 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, 1, 1, 1] [2021-06-05 15:08:49,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 15:08:49,749 INFO L430 AbstractCegarLoop]: === Iteration 212 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:49,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:49,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1237842204, now seen corresponding path program 131 times [2021-06-05 15:08:49,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:49,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461531081] [2021-06-05 15:08:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:49,934 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 15:08:49,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:49,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461531081] [2021-06-05 15:08:49,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461531081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:49,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111313678] [2021-06-05 15:08:49,934 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 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 15:08:49,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:08:49,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:49,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:49,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:50,137 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 15:08:50,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:50,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:50,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:50,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:08:50,213 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 15:08:50,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111313678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:50,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:50,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:08:50,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732502573] [2021-06-05 15:08:50,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:50,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:50,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:50,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:50,214 INFO L87 Difference]: Start difference. First operand 8004 states and 35276 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:51,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:51,891 INFO L93 Difference]: Finished difference Result 9983 states and 43185 transitions. [2021-06-05 15:08:51,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:08:51,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:51,913 INFO L225 Difference]: With dead ends: 9983 [2021-06-05 15:08:51,913 INFO L226 Difference]: Without dead ends: 9945 [2021-06-05 15:08:51,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1243.4ms TimeCoverageRelationStatistics Valid=405, Invalid=2351, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:08:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9945 states. [2021-06-05 15:08:52,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9945 to 8232. [2021-06-05 15:08:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8232 states, 8231 states have (on average 4.419147126716074) internal successors, (36374), 8231 states have internal predecessors, (36374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:52,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8232 states to 8232 states and 36374 transitions. [2021-06-05 15:08:52,095 INFO L78 Accepts]: Start accepts. Automaton has 8232 states and 36374 transitions. Word has length 33 [2021-06-05 15:08:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:52,095 INFO L482 AbstractCegarLoop]: Abstraction has 8232 states and 36374 transitions. [2021-06-05 15:08:52,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 8232 states and 36374 transitions. [2021-06-05 15:08:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:52,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:52,108 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, 1, 1, 1] [2021-06-05 15:08:52,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:52,309 INFO L430 AbstractCegarLoop]: === Iteration 213 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:52,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1753852486, now seen corresponding path program 132 times [2021-06-05 15:08:52,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:52,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919487668] [2021-06-05 15:08:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:52,480 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 15:08:52,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:52,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919487668] [2021-06-05 15:08:52,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919487668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:52,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840302217] [2021-06-05 15:08:52,480 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 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 15:08:52,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:08:52,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:52,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:52,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:52,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:52,713 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:08:52,714 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 27 treesize of output 55 [2021-06-05 15:08:52,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:08:52,736 INFO L628 ElimStorePlain]: treesize reduction 43, result has 33.8 percent of original size [2021-06-05 15:08:52,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:52,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 15:08:52,869 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 15:08:52,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840302217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:52,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:52,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:08:52,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745056432] [2021-06-05 15:08:52,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:08:52,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:52,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:08:52,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:08:52,870 INFO L87 Difference]: Start difference. First operand 8232 states and 36374 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:54,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:54,682 INFO L93 Difference]: Finished difference Result 9607 states and 41637 transitions. [2021-06-05 15:08:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:08:54,683 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:54,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:54,705 INFO L225 Difference]: With dead ends: 9607 [2021-06-05 15:08:54,705 INFO L226 Difference]: Without dead ends: 9585 [2021-06-05 15:08:54,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1249.8ms TimeCoverageRelationStatistics Valid=396, Invalid=2910, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:08:54,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9585 states. [2021-06-05 15:08:54,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9585 to 8427. [2021-06-05 15:08:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8427 states, 8426 states have (on average 4.421552338001424) internal successors, (37256), 8426 states have internal predecessors, (37256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8427 states to 8427 states and 37256 transitions. [2021-06-05 15:08:54,856 INFO L78 Accepts]: Start accepts. Automaton has 8427 states and 37256 transitions. Word has length 33 [2021-06-05 15:08:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:54,856 INFO L482 AbstractCegarLoop]: Abstraction has 8427 states and 37256 transitions. [2021-06-05 15:08:54,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 8427 states and 37256 transitions. [2021-06-05 15:08:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:54,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:54,869 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, 1, 1, 1] [2021-06-05 15:08:55,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:55,070 INFO L430 AbstractCegarLoop]: === Iteration 214 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:55,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1641752738, now seen corresponding path program 133 times [2021-06-05 15:08:55,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:55,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924645485] [2021-06-05 15:08:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:55,242 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 15:08:55,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:55,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924645485] [2021-06-05 15:08:55,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924645485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:55,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646678525] [2021-06-05 15:08:55,243 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 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 15:08:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:55,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:08:55,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:55,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:55,431 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 28 treesize of output 12 [2021-06-05 15:08:55,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:55,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:55,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:55,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:08:55,511 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 15:08:55,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646678525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:55,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:55,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:08:55,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433906952] [2021-06-05 15:08:55,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:55,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:55,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:55,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:55,512 INFO L87 Difference]: Start difference. First operand 8427 states and 37256 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:57,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:57,349 INFO L93 Difference]: Finished difference Result 10263 states and 44331 transitions. [2021-06-05 15:08:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:08:57,349 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:08:57,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:57,373 INFO L225 Difference]: With dead ends: 10263 [2021-06-05 15:08:57,373 INFO L226 Difference]: Without dead ends: 10220 [2021-06-05 15:08:57,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1497.2ms TimeCoverageRelationStatistics Valid=479, Invalid=3181, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:08:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10220 states. [2021-06-05 15:08:57,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10220 to 8360. [2021-06-05 15:08:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8360 states, 8359 states have (on average 4.426606053355664) internal successors, (37002), 8359 states have internal predecessors, (37002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:57,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8360 states to 8360 states and 37002 transitions. [2021-06-05 15:08:57,538 INFO L78 Accepts]: Start accepts. Automaton has 8360 states and 37002 transitions. Word has length 33 [2021-06-05 15:08:57,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:57,539 INFO L482 AbstractCegarLoop]: Abstraction has 8360 states and 37002 transitions. [2021-06-05 15:08:57,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:57,539 INFO L276 IsEmpty]: Start isEmpty. Operand 8360 states and 37002 transitions. [2021-06-05 15:08:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:08:57,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:57,552 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, 1, 1, 1] [2021-06-05 15:08:57,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:57,753 INFO L430 AbstractCegarLoop]: === Iteration 215 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:57,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:57,753 INFO L82 PathProgramCache]: Analyzing trace with hash 255590090, now seen corresponding path program 134 times [2021-06-05 15:08:57,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:57,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146868539] [2021-06-05 15:08:57,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:57,995 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 15:08:57,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:57,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146868539] [2021-06-05 15:08:57,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146868539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:57,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300379596] [2021-06-05 15:08:57,996 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 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 15:08:58,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:58,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:58,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:08:58,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:58,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:58,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:58,205 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 26 treesize of output 32 [2021-06-05 15:08:58,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:58,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:58,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:58,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:39 [2021-06-05 15:08:58,356 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 15:08:58,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300379596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:58,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:58,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:08:58,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328223315] [2021-06-05 15:08:58,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:08:58,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:58,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:08:58,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:08:58,357 INFO L87 Difference]: Start difference. First operand 8360 states and 37002 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:00,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:00,555 INFO L93 Difference]: Finished difference Result 9468 states and 41516 transitions. [2021-06-05 15:09:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:09:00,556 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:00,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:00,577 INFO L225 Difference]: With dead ends: 9468 [2021-06-05 15:09:00,577 INFO L226 Difference]: Without dead ends: 9438 [2021-06-05 15:09:00,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1842.7ms TimeCoverageRelationStatistics Valid=467, Invalid=3315, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:09:00,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9438 states. [2021-06-05 15:09:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9438 to 8345. [2021-06-05 15:09:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8345 states, 8344 states have (on average 4.427852348993288) internal successors, (36946), 8344 states have internal predecessors, (36946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:00,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8345 states to 8345 states and 36946 transitions. [2021-06-05 15:09:00,715 INFO L78 Accepts]: Start accepts. Automaton has 8345 states and 36946 transitions. Word has length 33 [2021-06-05 15:09:00,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:00,715 INFO L482 AbstractCegarLoop]: Abstraction has 8345 states and 36946 transitions. [2021-06-05 15:09:00,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 8345 states and 36946 transitions. [2021-06-05 15:09:00,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:00,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:00,729 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, 1, 1, 1] [2021-06-05 15:09:00,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:00,932 INFO L430 AbstractCegarLoop]: === Iteration 216 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:00,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:00,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1963921440, now seen corresponding path program 135 times [2021-06-05 15:09:00,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:00,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759089403] [2021-06-05 15:09:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:01,133 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 15:09:01,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:01,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759089403] [2021-06-05 15:09:01,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759089403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:01,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916336873] [2021-06-05 15:09:01,134 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 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 15:09:01,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:09:01,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:01,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:01,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:01,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:01,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:09:01,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:01,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:01,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:01,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:09:01,538 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 15:09:01,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916336873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:01,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:01,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:09:01,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323602896] [2021-06-05 15:09:01,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:09:01,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:01,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:09:01,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:09:01,539 INFO L87 Difference]: Start difference. First operand 8345 states and 36946 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:02,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:02,450 INFO L93 Difference]: Finished difference Result 8869 states and 39026 transitions. [2021-06-05 15:09:02,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:09:02,450 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:02,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:02,472 INFO L225 Difference]: With dead ends: 8869 [2021-06-05 15:09:02,472 INFO L226 Difference]: Without dead ends: 8854 [2021-06-05 15:09:02,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 715.8ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:09:02,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8854 states. [2021-06-05 15:09:02,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8854 to 8333. [2021-06-05 15:09:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8333 states, 8332 states have (on average 4.427868458953433) internal successors, (36893), 8332 states have internal predecessors, (36893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:02,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8333 states to 8333 states and 36893 transitions. [2021-06-05 15:09:02,605 INFO L78 Accepts]: Start accepts. Automaton has 8333 states and 36893 transitions. Word has length 33 [2021-06-05 15:09:02,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:02,605 INFO L482 AbstractCegarLoop]: Abstraction has 8333 states and 36893 transitions. [2021-06-05 15:09:02,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 8333 states and 36893 transitions. [2021-06-05 15:09:02,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:02,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:02,618 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, 1, 1, 1] [2021-06-05 15:09:02,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 15:09:02,819 INFO L430 AbstractCegarLoop]: === Iteration 217 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:02,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:02,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1107837472, now seen corresponding path program 136 times [2021-06-05 15:09:02,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:02,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805375536] [2021-06-05 15:09:02,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:03,000 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 15:09:03,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:03,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805375536] [2021-06-05 15:09:03,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805375536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:03,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799663035] [2021-06-05 15:09:03,001 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 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 15:09:03,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:03,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:03,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:03,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:03,162 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 15:09:03,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:03,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:03,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:03,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 15:09:03,254 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 15:09:03,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799663035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:03,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:03,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:09:03,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353203565] [2021-06-05 15:09:03,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:03,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:03,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:03,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:03,255 INFO L87 Difference]: Start difference. First operand 8333 states and 36893 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:04,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:04,873 INFO L93 Difference]: Finished difference Result 9800 states and 42777 transitions. [2021-06-05 15:09:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:09:04,874 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:04,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:04,895 INFO L225 Difference]: With dead ends: 9800 [2021-06-05 15:09:04,896 INFO L226 Difference]: Without dead ends: 9762 [2021-06-05 15:09:04,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1298.9ms TimeCoverageRelationStatistics Valid=457, Invalid=2405, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:09:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9762 states. [2021-06-05 15:09:05,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9762 to 8549. [2021-06-05 15:09:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8549 states, 8548 states have (on average 4.43238184370613) internal successors, (37888), 8548 states have internal predecessors, (37888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8549 states to 8549 states and 37888 transitions. [2021-06-05 15:09:05,051 INFO L78 Accepts]: Start accepts. Automaton has 8549 states and 37888 transitions. Word has length 33 [2021-06-05 15:09:05,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:05,051 INFO L482 AbstractCegarLoop]: Abstraction has 8549 states and 37888 transitions. [2021-06-05 15:09:05,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:05,051 INFO L276 IsEmpty]: Start isEmpty. Operand 8549 states and 37888 transitions. [2021-06-05 15:09:05,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:05,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:05,065 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, 1, 1, 1] [2021-06-05 15:09:05,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 15:09:05,266 INFO L430 AbstractCegarLoop]: === Iteration 218 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:05,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:05,266 INFO L82 PathProgramCache]: Analyzing trace with hash 195435134, now seen corresponding path program 137 times [2021-06-05 15:09:05,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:05,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666459188] [2021-06-05 15:09:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:05,524 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 15:09:05,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:05,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666459188] [2021-06-05 15:09:05,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666459188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:05,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474988369] [2021-06-05 15:09:05,525 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 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 15:09:05,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:09:05,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:05,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:05,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:05,683 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 15:09:05,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:05,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:05,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:05,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 15:09:05,778 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 15:09:05,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474988369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:05,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:05,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:09:05,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147560286] [2021-06-05 15:09:05,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:09:05,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:05,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:09:05,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:09:05,779 INFO L87 Difference]: Start difference. First operand 8549 states and 37888 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:07,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:07,033 INFO L93 Difference]: Finished difference Result 9578 states and 41726 transitions. [2021-06-05 15:09:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:09:07,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:07,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:07,055 INFO L225 Difference]: With dead ends: 9578 [2021-06-05 15:09:07,055 INFO L226 Difference]: Without dead ends: 9538 [2021-06-05 15:09:07,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1058.1ms TimeCoverageRelationStatistics Valid=371, Invalid=1791, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:09:07,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9538 states. [2021-06-05 15:09:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9538 to 8512. [2021-06-05 15:09:07,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8512 states, 8511 states have (on average 4.433674068852074) internal successors, (37735), 8511 states have internal predecessors, (37735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8512 states to 8512 states and 37735 transitions. [2021-06-05 15:09:07,210 INFO L78 Accepts]: Start accepts. Automaton has 8512 states and 37735 transitions. Word has length 33 [2021-06-05 15:09:07,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:07,210 INFO L482 AbstractCegarLoop]: Abstraction has 8512 states and 37735 transitions. [2021-06-05 15:09:07,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 8512 states and 37735 transitions. [2021-06-05 15:09:07,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:07,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:07,224 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, 1, 1, 1] [2021-06-05 15:09:07,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 15:09:07,425 INFO L430 AbstractCegarLoop]: === Iteration 219 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:07,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:07,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2090089586, now seen corresponding path program 138 times [2021-06-05 15:09:07,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:07,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510241864] [2021-06-05 15:09:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:07,602 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 15:09:07,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:07,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510241864] [2021-06-05 15:09:07,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510241864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:07,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525233808] [2021-06-05 15:09:07,603 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 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 15:09:07,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:09:07,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:07,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:07,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:07,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:07,815 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:09:07,815 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 29 treesize of output 57 [2021-06-05 15:09:07,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:07,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:07,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:07,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 15:09:08,025 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 15:09:08,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525233808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:08,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:08,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:09:08,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800681371] [2021-06-05 15:09:08,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:09:08,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:08,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:09:08,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:09:08,027 INFO L87 Difference]: Start difference. First operand 8512 states and 37735 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:09,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:09,815 INFO L93 Difference]: Finished difference Result 9072 states and 39928 transitions. [2021-06-05 15:09:09,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:09:09,815 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:09,836 INFO L225 Difference]: With dead ends: 9072 [2021-06-05 15:09:09,836 INFO L226 Difference]: Without dead ends: 9028 [2021-06-05 15:09:09,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1357.9ms TimeCoverageRelationStatistics Valid=272, Invalid=2484, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:09:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9028 states. [2021-06-05 15:09:09,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9028 to 8530. [2021-06-05 15:09:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8530 states, 8529 states have (on average 4.434752022511431) internal successors, (37824), 8529 states have internal predecessors, (37824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:09,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8530 states to 8530 states and 37824 transitions. [2021-06-05 15:09:09,977 INFO L78 Accepts]: Start accepts. Automaton has 8530 states and 37824 transitions. Word has length 33 [2021-06-05 15:09:09,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:09,977 INFO L482 AbstractCegarLoop]: Abstraction has 8530 states and 37824 transitions. [2021-06-05 15:09:09,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:09,977 INFO L276 IsEmpty]: Start isEmpty. Operand 8530 states and 37824 transitions. [2021-06-05 15:09:09,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:09,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:09,991 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, 1, 1, 1] [2021-06-05 15:09:10,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 15:09:10,192 INFO L430 AbstractCegarLoop]: === Iteration 220 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:10,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:10,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1156105308, now seen corresponding path program 139 times [2021-06-05 15:09:10,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:10,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705098975] [2021-06-05 15:09:10,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:10,369 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 15:09:10,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:10,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705098975] [2021-06-05 15:09:10,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705098975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:10,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627397200] [2021-06-05 15:09:10,370 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 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 15:09:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:10,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:10,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:10,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:10,607 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 29 treesize of output 13 [2021-06-05 15:09:10,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:10,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:10,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:10,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:09:10,700 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 15:09:10,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627397200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:10,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:10,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:09:10,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303043027] [2021-06-05 15:09:10,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:10,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:10,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:10,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:10,701 INFO L87 Difference]: Start difference. First operand 8530 states and 37824 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:12,596 INFO L93 Difference]: Finished difference Result 10264 states and 44523 transitions. [2021-06-05 15:09:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:09:12,597 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:12,619 INFO L225 Difference]: With dead ends: 10264 [2021-06-05 15:09:12,619 INFO L226 Difference]: Without dead ends: 10226 [2021-06-05 15:09:12,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1551.5ms TimeCoverageRelationStatistics Valid=482, Invalid=2824, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:09:12,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10226 states. [2021-06-05 15:09:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10226 to 8691. [2021-06-05 15:09:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8691 states, 8690 states have (on average 4.438780207134638) internal successors, (38573), 8690 states have internal predecessors, (38573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8691 states to 8691 states and 38573 transitions. [2021-06-05 15:09:12,770 INFO L78 Accepts]: Start accepts. Automaton has 8691 states and 38573 transitions. Word has length 33 [2021-06-05 15:09:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:12,771 INFO L482 AbstractCegarLoop]: Abstraction has 8691 states and 38573 transitions. [2021-06-05 15:09:12,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 8691 states and 38573 transitions. [2021-06-05 15:09:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:12,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:12,784 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, 1, 1, 1] [2021-06-05 15:09:12,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:12,985 INFO L430 AbstractCegarLoop]: === Iteration 221 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:12,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:12,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1835589382, now seen corresponding path program 140 times [2021-06-05 15:09:12,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:12,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978396491] [2021-06-05 15:09:12,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:13,161 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 15:09:13,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:13,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978396491] [2021-06-05 15:09:13,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978396491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:13,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035092640] [2021-06-05 15:09:13,162 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 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 15:09:13,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:13,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:13,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:13,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:13,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:13,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:13,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:13,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:13,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:13,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:09:13,532 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 15:09:13,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035092640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:13,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:13,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:09:13,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822931550] [2021-06-05 15:09:13,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:09:13,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:13,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:09:13,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:09:13,533 INFO L87 Difference]: Start difference. First operand 8691 states and 38573 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:15,295 INFO L93 Difference]: Finished difference Result 9622 states and 42115 transitions. [2021-06-05 15:09:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:09:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:15,317 INFO L225 Difference]: With dead ends: 9622 [2021-06-05 15:09:15,317 INFO L226 Difference]: Without dead ends: 9609 [2021-06-05 15:09:15,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1429.8ms TimeCoverageRelationStatistics Valid=433, Invalid=1823, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:09:15,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9609 states. [2021-06-05 15:09:15,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9609 to 8712. [2021-06-05 15:09:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8712 states, 8711 states have (on average 4.439214785902881) internal successors, (38670), 8711 states have internal predecessors, (38670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:15,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8712 states to 8712 states and 38670 transitions. [2021-06-05 15:09:15,471 INFO L78 Accepts]: Start accepts. Automaton has 8712 states and 38670 transitions. Word has length 33 [2021-06-05 15:09:15,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:15,471 INFO L482 AbstractCegarLoop]: Abstraction has 8712 states and 38670 transitions. [2021-06-05 15:09:15,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 8712 states and 38670 transitions. [2021-06-05 15:09:15,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:15,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:15,486 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, 1, 1, 1] [2021-06-05 15:09:15,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-06-05 15:09:15,686 INFO L430 AbstractCegarLoop]: === Iteration 222 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:15,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:15,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1560015842, now seen corresponding path program 141 times [2021-06-05 15:09:15,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:15,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918495631] [2021-06-05 15:09:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:15,881 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 15:09:15,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:15,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918495631] [2021-06-05 15:09:15,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918495631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:15,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307719034] [2021-06-05 15:09:15,882 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 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 15:09:15,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:09:15,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:15,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:09:15,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:16,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:16,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:16,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:16,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:16,052 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 15:09:16,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:16,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:16,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:16,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-05 15:09:16,241 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 15:09:16,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307719034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:16,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:16,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:09:16,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313138500] [2021-06-05 15:09:16,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:09:16,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:16,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:09:16,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:09:16,242 INFO L87 Difference]: Start difference. First operand 8712 states and 38670 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:17,499 INFO L93 Difference]: Finished difference Result 9650 states and 42263 transitions. [2021-06-05 15:09:17,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:09:17,500 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:17,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:17,521 INFO L225 Difference]: With dead ends: 9650 [2021-06-05 15:09:17,522 INFO L226 Difference]: Without dead ends: 9620 [2021-06-05 15:09:17,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1102.0ms TimeCoverageRelationStatistics Valid=284, Invalid=1786, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:09:17,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9620 states. [2021-06-05 15:09:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9620 to 8716. [2021-06-05 15:09:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8716 states, 8715 states have (on average 4.439013195639702) internal successors, (38686), 8715 states have internal predecessors, (38686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:17,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8716 states to 8716 states and 38686 transitions. [2021-06-05 15:09:17,668 INFO L78 Accepts]: Start accepts. Automaton has 8716 states and 38686 transitions. Word has length 33 [2021-06-05 15:09:17,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:17,668 INFO L482 AbstractCegarLoop]: Abstraction has 8716 states and 38686 transitions. [2021-06-05 15:09:17,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:17,668 INFO L276 IsEmpty]: Start isEmpty. Operand 8716 states and 38686 transitions. [2021-06-05 15:09:17,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:17,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:17,682 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, 1, 1, 1] [2021-06-05 15:09:17,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:17,883 INFO L430 AbstractCegarLoop]: === Iteration 223 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:17,883 INFO L82 PathProgramCache]: Analyzing trace with hash -220582460, now seen corresponding path program 142 times [2021-06-05 15:09:17,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:17,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074795605] [2021-06-05 15:09:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:18,083 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 15:09:18,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:18,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074795605] [2021-06-05 15:09:18,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074795605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:18,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936204535] [2021-06-05 15:09:18,084 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 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 15:09:18,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:18,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:18,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:18,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:18,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:18,245 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 29 treesize of output 13 [2021-06-05 15:09:18,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:18,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:18,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:18,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:09:18,341 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 15:09:18,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936204535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:18,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:18,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:09:18,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634456657] [2021-06-05 15:09:18,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:09:18,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:18,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:09:18,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:09:18,342 INFO L87 Difference]: Start difference. First operand 8716 states and 38686 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:19,966 INFO L93 Difference]: Finished difference Result 10020 states and 43550 transitions. [2021-06-05 15:09:19,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:09:19,966 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:19,990 INFO L225 Difference]: With dead ends: 10020 [2021-06-05 15:09:19,990 INFO L226 Difference]: Without dead ends: 9986 [2021-06-05 15:09:19,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1240.3ms TimeCoverageRelationStatistics Valid=404, Invalid=2146, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:09:20,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9986 states. [2021-06-05 15:09:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9986 to 8725. [2021-06-05 15:09:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8725 states, 8724 states have (on average 4.441655204034847) internal successors, (38749), 8724 states have internal predecessors, (38749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8725 states to 8725 states and 38749 transitions. [2021-06-05 15:09:20,151 INFO L78 Accepts]: Start accepts. Automaton has 8725 states and 38749 transitions. Word has length 33 [2021-06-05 15:09:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:20,151 INFO L482 AbstractCegarLoop]: Abstraction has 8725 states and 38749 transitions. [2021-06-05 15:09:20,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 8725 states and 38749 transitions. [2021-06-05 15:09:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:20,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:20,166 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, 1, 1, 1] [2021-06-05 15:09:20,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:20,367 INFO L430 AbstractCegarLoop]: === Iteration 224 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:20,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:20,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1675337628, now seen corresponding path program 143 times [2021-06-05 15:09:20,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:20,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572749906] [2021-06-05 15:09:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:20,610 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 15:09:20,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:20,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572749906] [2021-06-05 15:09:20,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572749906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:20,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342894862] [2021-06-05 15:09:20,611 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 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 15:09:20,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:09:20,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:20,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:20,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:20,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:20,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:09:20,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:20,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:20,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:20,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:09:21,068 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 15:09:21,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342894862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:21,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:21,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:09:21,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485640217] [2021-06-05 15:09:21,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:21,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:21,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:21,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:21,069 INFO L87 Difference]: Start difference. First operand 8725 states and 38749 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:22,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:22,751 INFO L93 Difference]: Finished difference Result 9519 states and 41919 transitions. [2021-06-05 15:09:22,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:09:22,751 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:22,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:22,774 INFO L225 Difference]: With dead ends: 9519 [2021-06-05 15:09:22,774 INFO L226 Difference]: Without dead ends: 9491 [2021-06-05 15:09:22,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1436.7ms TimeCoverageRelationStatistics Valid=257, Invalid=1813, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:09:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2021-06-05 15:09:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 8713. [2021-06-05 15:09:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8713 states, 8712 states have (on average 4.4421487603305785) internal successors, (38700), 8712 states have internal predecessors, (38700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8713 states to 8713 states and 38700 transitions. [2021-06-05 15:09:22,921 INFO L78 Accepts]: Start accepts. Automaton has 8713 states and 38700 transitions. Word has length 33 [2021-06-05 15:09:22,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:22,921 INFO L482 AbstractCegarLoop]: Abstraction has 8713 states and 38700 transitions. [2021-06-05 15:09:22,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:22,921 INFO L276 IsEmpty]: Start isEmpty. Operand 8713 states and 38700 transitions. [2021-06-05 15:09:22,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:22,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:22,936 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, 1, 1, 1] [2021-06-05 15:09:23,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-05 15:09:23,136 INFO L430 AbstractCegarLoop]: === Iteration 225 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:23,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:23,137 INFO L82 PathProgramCache]: Analyzing trace with hash -60083088, now seen corresponding path program 144 times [2021-06-05 15:09:23,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:23,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040557305] [2021-06-05 15:09:23,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:23,450 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 15:09:23,482 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 15:09:23,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:23,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040557305] [2021-06-05 15:09:23,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040557305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:23,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142059447] [2021-06-05 15:09:23,482 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 15:09:23,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:09:23,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:23,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:23,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:23,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:23,768 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:09:23,768 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 27 treesize of output 55 [2021-06-05 15:09:23,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:09:23,796 INFO L628 ElimStorePlain]: treesize reduction 82, result has 22.6 percent of original size [2021-06-05 15:09:23,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:23,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:24 [2021-06-05 15:09:23,922 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 15:09:23,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142059447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:23,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:23,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:09:23,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359856734] [2021-06-05 15:09:23,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:09:23,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:09:23,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:09:23,923 INFO L87 Difference]: Start difference. First operand 8713 states and 38700 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:25,494 INFO L93 Difference]: Finished difference Result 9896 states and 43239 transitions. [2021-06-05 15:09:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:09:25,494 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:25,517 INFO L225 Difference]: With dead ends: 9896 [2021-06-05 15:09:25,517 INFO L226 Difference]: Without dead ends: 9882 [2021-06-05 15:09:25,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1339.3ms TimeCoverageRelationStatistics Valid=361, Invalid=2395, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:09:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9882 states. [2021-06-05 15:09:25,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9882 to 8822. [2021-06-05 15:09:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8822 states, 8821 states have (on average 4.44416732796735) internal successors, (39202), 8821 states have internal predecessors, (39202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8822 states to 8822 states and 39202 transitions. [2021-06-05 15:09:25,671 INFO L78 Accepts]: Start accepts. Automaton has 8822 states and 39202 transitions. Word has length 33 [2021-06-05 15:09:25,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:25,671 INFO L482 AbstractCegarLoop]: Abstraction has 8822 states and 39202 transitions. [2021-06-05 15:09:25,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:25,672 INFO L276 IsEmpty]: Start isEmpty. Operand 8822 states and 39202 transitions. [2021-06-05 15:09:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:25,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:25,686 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, 1, 1, 1] [2021-06-05 15:09:25,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 15:09:25,886 INFO L430 AbstractCegarLoop]: === Iteration 226 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:25,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:25,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1071650020, now seen corresponding path program 145 times [2021-06-05 15:09:25,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:25,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166642163] [2021-06-05 15:09:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:26,082 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 15:09:26,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:26,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166642163] [2021-06-05 15:09:26,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166642163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:26,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781269273] [2021-06-05 15:09:26,082 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 15:09:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:26,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:26,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:26,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:26,266 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 28 treesize of output 12 [2021-06-05 15:09:26,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:26,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:26,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:26,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:09:26,345 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 15:09:26,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781269273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:26,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:26,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:09:26,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785824298] [2021-06-05 15:09:26,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:26,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:26,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:26,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:26,346 INFO L87 Difference]: Start difference. First operand 8822 states and 39202 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:27,668 INFO L93 Difference]: Finished difference Result 10528 states and 45626 transitions. [2021-06-05 15:09:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:09:27,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:27,746 INFO L225 Difference]: With dead ends: 10528 [2021-06-05 15:09:27,746 INFO L226 Difference]: Without dead ends: 10504 [2021-06-05 15:09:27,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 832.1ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:09:27,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10504 states. [2021-06-05 15:09:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10504 to 8919. [2021-06-05 15:09:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8919 states, 8918 states have (on average 4.449876653958286) internal successors, (39684), 8918 states have internal predecessors, (39684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8919 states to 8919 states and 39684 transitions. [2021-06-05 15:09:27,918 INFO L78 Accepts]: Start accepts. Automaton has 8919 states and 39684 transitions. Word has length 33 [2021-06-05 15:09:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:27,918 INFO L482 AbstractCegarLoop]: Abstraction has 8919 states and 39684 transitions. [2021-06-05 15:09:27,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 8919 states and 39684 transitions. [2021-06-05 15:09:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:27,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:27,933 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, 1, 1, 1] [2021-06-05 15:09:28,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-05 15:09:28,134 INFO L430 AbstractCegarLoop]: === Iteration 227 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:28,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:28,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1554923834, now seen corresponding path program 146 times [2021-06-05 15:09:28,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:28,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289451033] [2021-06-05 15:09:28,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:28,445 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 15:09:28,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:28,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289451033] [2021-06-05 15:09:28,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289451033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:28,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016618632] [2021-06-05 15:09:28,446 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 15:09:28,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:28,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:28,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:09:28,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:28,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:28,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:28,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:28,818 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 22 treesize of output 30 [2021-06-05 15:09:28,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:28,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:28,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:28,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:32 [2021-06-05 15:09:29,005 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 15:09:29,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016618632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:29,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:29,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 15:09:29,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651211822] [2021-06-05 15:09:29,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:09:29,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:29,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:09:29,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:09:29,006 INFO L87 Difference]: Start difference. First operand 8919 states and 39684 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) 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 15:09:30,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:30,312 INFO L93 Difference]: Finished difference Result 9755 states and 42896 transitions. [2021-06-05 15:09:30,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:09:30,312 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 33 [2021-06-05 15:09:30,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:30,334 INFO L225 Difference]: With dead ends: 9755 [2021-06-05 15:09:30,334 INFO L226 Difference]: Without dead ends: 9732 [2021-06-05 15:09:30,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1186.5ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:09:30,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9732 states. [2021-06-05 15:09:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9732 to 8879. [2021-06-05 15:09:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8879 states, 8878 states have (on average 4.451903581887812) internal successors, (39524), 8878 states have internal predecessors, (39524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8879 states to 8879 states and 39524 transitions. [2021-06-05 15:09:30,483 INFO L78 Accepts]: Start accepts. Automaton has 8879 states and 39524 transitions. Word has length 33 [2021-06-05 15:09:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:30,483 INFO L482 AbstractCegarLoop]: Abstraction has 8879 states and 39524 transitions. [2021-06-05 15:09:30,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 15:09:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 8879 states and 39524 transitions. [2021-06-05 15:09:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:30,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:30,498 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, 1, 1, 1] [2021-06-05 15:09:30,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:30,698 INFO L430 AbstractCegarLoop]: === Iteration 228 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:30,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:30,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1407378432, now seen corresponding path program 147 times [2021-06-05 15:09:30,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:30,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536689323] [2021-06-05 15:09:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:30,857 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 15:09:30,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:30,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536689323] [2021-06-05 15:09:30,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536689323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:30,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173907974] [2021-06-05 15:09:30,857 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 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 15:09:30,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:09:30,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:30,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 15:09:30,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:31,041 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 15:09:31,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:31,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:31,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:31,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:18 [2021-06-05 15:09:31,156 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 15:09:31,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173907974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:31,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:31,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 15:09:31,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486012102] [2021-06-05 15:09:31,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:09:31,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:31,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:09:31,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:09:31,157 INFO L87 Difference]: Start difference. First operand 8879 states and 39524 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) 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 15:09:32,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:32,734 INFO L93 Difference]: Finished difference Result 10245 states and 44612 transitions. [2021-06-05 15:09:32,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:09:32,735 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 33 [2021-06-05 15:09:32,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:32,758 INFO L225 Difference]: With dead ends: 10245 [2021-06-05 15:09:32,758 INFO L226 Difference]: Without dead ends: 10186 [2021-06-05 15:09:32,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1089.0ms TimeCoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:09:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-06-05 15:09:32,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 8876. [2021-06-05 15:09:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8876 states, 8875 states have (on average 4.451943661971831) internal successors, (39511), 8875 states have internal predecessors, (39511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8876 states to 8876 states and 39511 transitions. [2021-06-05 15:09:32,922 INFO L78 Accepts]: Start accepts. Automaton has 8876 states and 39511 transitions. Word has length 33 [2021-06-05 15:09:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:32,922 INFO L482 AbstractCegarLoop]: Abstraction has 8876 states and 39511 transitions. [2021-06-05 15:09:32,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 15:09:32,922 INFO L276 IsEmpty]: Start isEmpty. Operand 8876 states and 39511 transitions. [2021-06-05 15:09:32,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:32,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:32,936 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, 1, 1, 1] [2021-06-05 15:09:33,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2021-06-05 15:09:33,137 INFO L430 AbstractCegarLoop]: === Iteration 229 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:33,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1832270746, now seen corresponding path program 148 times [2021-06-05 15:09:33,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:33,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275120558] [2021-06-05 15:09:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:33,311 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 15:09:33,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:33,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275120558] [2021-06-05 15:09:33,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275120558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:33,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93506397] [2021-06-05 15:09:33,311 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 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 15:09:33,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:33,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:33,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:33,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:33,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:33,526 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 28 treesize of output 12 [2021-06-05 15:09:33,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:33,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:33,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:33,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:09:33,607 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 15:09:33,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93506397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:33,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:33,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:09:33,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971601902] [2021-06-05 15:09:33,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:09:33,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:33,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:09:33,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:09:33,608 INFO L87 Difference]: Start difference. First operand 8876 states and 39511 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:35,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:35,040 INFO L93 Difference]: Finished difference Result 10460 states and 45732 transitions. [2021-06-05 15:09:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:09:35,041 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:35,064 INFO L225 Difference]: With dead ends: 10460 [2021-06-05 15:09:35,064 INFO L226 Difference]: Without dead ends: 10430 [2021-06-05 15:09:35,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1072.9ms TimeCoverageRelationStatistics Valid=271, Invalid=2179, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:09:35,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10430 states. [2021-06-05 15:09:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10430 to 8873. [2021-06-05 15:09:35,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8873 states, 8872 states have (on average 4.452547339945897) internal successors, (39503), 8872 states have internal predecessors, (39503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:35,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8873 states to 8873 states and 39503 transitions. [2021-06-05 15:09:35,235 INFO L78 Accepts]: Start accepts. Automaton has 8873 states and 39503 transitions. Word has length 33 [2021-06-05 15:09:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:35,235 INFO L482 AbstractCegarLoop]: Abstraction has 8873 states and 39503 transitions. [2021-06-05 15:09:35,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 8873 states and 39503 transitions. [2021-06-05 15:09:35,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:35,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:35,250 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, 1, 1, 1] [2021-06-05 15:09:35,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:35,450 INFO L430 AbstractCegarLoop]: === Iteration 230 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:35,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:35,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1889204532, now seen corresponding path program 149 times [2021-06-05 15:09:35,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:35,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344858200] [2021-06-05 15:09:35,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:35,618 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 15:09:35,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:35,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344858200] [2021-06-05 15:09:35,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344858200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:35,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660285691] [2021-06-05 15:09:35,618 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 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 15:09:35,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:09:35,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:35,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:35,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:35,774 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 15:09:35,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:35,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:35,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:35,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 15:09:35,865 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 15:09:35,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660285691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:35,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:35,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:09:35,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584284925] [2021-06-05 15:09:35,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:35,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:35,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:35,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:35,866 INFO L87 Difference]: Start difference. First operand 8873 states and 39503 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:09:36,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:36,843 INFO L93 Difference]: Finished difference Result 9991 states and 43743 transitions. [2021-06-05 15:09:36,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:09:36,843 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 15:09:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:36,866 INFO L225 Difference]: With dead ends: 9991 [2021-06-05 15:09:36,866 INFO L226 Difference]: Without dead ends: 9958 [2021-06-05 15:09:36,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 888.1ms TimeCoverageRelationStatistics Valid=333, Invalid=1389, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:09:36,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9958 states. [2021-06-05 15:09:36,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9958 to 8919. [2021-06-05 15:09:36,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8919 states, 8918 states have (on average 4.457501681991478) internal successors, (39752), 8918 states have internal predecessors, (39752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8919 states to 8919 states and 39752 transitions. [2021-06-05 15:09:37,022 INFO L78 Accepts]: Start accepts. Automaton has 8919 states and 39752 transitions. Word has length 33 [2021-06-05 15:09:37,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:37,022 INFO L482 AbstractCegarLoop]: Abstraction has 8919 states and 39752 transitions. [2021-06-05 15:09:37,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:09:37,022 INFO L276 IsEmpty]: Start isEmpty. Operand 8919 states and 39752 transitions. [2021-06-05 15:09:37,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:37,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:37,037 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, 1, 1, 1] [2021-06-05 15:09:37,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:37,237 INFO L430 AbstractCegarLoop]: === Iteration 231 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:37,237 INFO L82 PathProgramCache]: Analyzing trace with hash 918933764, now seen corresponding path program 150 times [2021-06-05 15:09:37,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:37,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025377328] [2021-06-05 15:09:37,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:37,412 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 15:09:37,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:37,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025377328] [2021-06-05 15:09:37,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025377328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:37,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717480888] [2021-06-05 15:09:37,413 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 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 15:09:37,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:09:37,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:37,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:09:37,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:37,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:37,613 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:09:37,613 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-05 15:09:37,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:37,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:37,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:37,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:59 [2021-06-05 15:09:37,853 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 15:09:37,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717480888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:37,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:37,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:09:37,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153482534] [2021-06-05 15:09:37,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:09:37,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:37,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:09:37,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:09:37,854 INFO L87 Difference]: Start difference. First operand 8919 states and 39752 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:39,541 INFO L93 Difference]: Finished difference Result 9626 states and 42490 transitions. [2021-06-05 15:09:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:09:39,541 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:39,562 INFO L225 Difference]: With dead ends: 9626 [2021-06-05 15:09:39,562 INFO L226 Difference]: Without dead ends: 9599 [2021-06-05 15:09:39,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1344.2ms TimeCoverageRelationStatistics Valid=287, Invalid=2263, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:09:39,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9599 states. [2021-06-05 15:09:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9599 to 8937. [2021-06-05 15:09:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8937 states, 8936 states have (on average 4.458818263205013) internal successors, (39844), 8936 states have internal predecessors, (39844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8937 states to 8937 states and 39844 transitions. [2021-06-05 15:09:39,725 INFO L78 Accepts]: Start accepts. Automaton has 8937 states and 39844 transitions. Word has length 33 [2021-06-05 15:09:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:39,725 INFO L482 AbstractCegarLoop]: Abstraction has 8937 states and 39844 transitions. [2021-06-05 15:09:39,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 8937 states and 39844 transitions. [2021-06-05 15:09:39,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:39,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:39,741 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, 1, 1, 1] [2021-06-05 15:09:39,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 15:09:39,941 INFO L430 AbstractCegarLoop]: === Iteration 232 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:39,941 INFO L82 PathProgramCache]: Analyzing trace with hash -141819984, now seen corresponding path program 151 times [2021-06-05 15:09:39,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:39,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540374332] [2021-06-05 15:09:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:40,106 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 15:09:40,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:40,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540374332] [2021-06-05 15:09:40,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540374332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:40,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86669053] [2021-06-05 15:09:40,107 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 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 15:09:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:40,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:40,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:40,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:40,335 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 29 treesize of output 13 [2021-06-05 15:09:40,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:40,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:40,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:40,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:09:40,424 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 15:09:40,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86669053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:40,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:40,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:09:40,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205054540] [2021-06-05 15:09:40,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:40,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:40,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:40,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:40,425 INFO L87 Difference]: Start difference. First operand 8937 states and 39844 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:09:41,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:41,574 INFO L93 Difference]: Finished difference Result 10354 states and 45076 transitions. [2021-06-05 15:09:41,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:09:41,574 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 15:09:41,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:41,597 INFO L225 Difference]: With dead ends: 10354 [2021-06-05 15:09:41,597 INFO L226 Difference]: Without dead ends: 10309 [2021-06-05 15:09:41,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 933.7ms TimeCoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:09:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10309 states. [2021-06-05 15:09:41,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10309 to 8936. [2021-06-05 15:09:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8936 states, 8935 states have (on average 4.462674874090655) internal successors, (39874), 8935 states have internal predecessors, (39874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8936 states to 8936 states and 39874 transitions. [2021-06-05 15:09:41,757 INFO L78 Accepts]: Start accepts. Automaton has 8936 states and 39874 transitions. Word has length 33 [2021-06-05 15:09:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:41,757 INFO L482 AbstractCegarLoop]: Abstraction has 8936 states and 39874 transitions. [2021-06-05 15:09:41,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:09:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 8936 states and 39874 transitions. [2021-06-05 15:09:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:41,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:41,771 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, 1, 1, 1] [2021-06-05 15:09:41,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 15:09:41,981 INFO L430 AbstractCegarLoop]: === Iteration 233 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:41,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:41,981 INFO L82 PathProgramCache]: Analyzing trace with hash -192289258, now seen corresponding path program 152 times [2021-06-05 15:09:41,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:41,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914978200] [2021-06-05 15:09:41,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:42,144 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 15:09:42,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:42,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914978200] [2021-06-05 15:09:42,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914978200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:42,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869164351] [2021-06-05 15:09:42,144 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 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 15:09:42,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:42,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:42,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:42,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:42,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:42,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:42,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:42,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:42,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:42,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:09:42,496 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 15:09:42,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869164351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:42,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:42,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:09:42,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118317845] [2021-06-05 15:09:42,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:09:42,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:42,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:09:42,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:09:42,497 INFO L87 Difference]: Start difference. First operand 8936 states and 39874 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:43,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:43,853 INFO L93 Difference]: Finished difference Result 9546 states and 42305 transitions. [2021-06-05 15:09:43,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:09:43,853 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:43,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:43,875 INFO L225 Difference]: With dead ends: 9546 [2021-06-05 15:09:43,875 INFO L226 Difference]: Without dead ends: 9533 [2021-06-05 15:09:43,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1156.7ms TimeCoverageRelationStatistics Valid=311, Invalid=1581, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:09:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9533 states. [2021-06-05 15:09:44,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 8921. [2021-06-05 15:09:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8921 states, 8920 states have (on average 4.463565022421525) internal successors, (39815), 8920 states have internal predecessors, (39815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8921 states to 8921 states and 39815 transitions. [2021-06-05 15:09:44,088 INFO L78 Accepts]: Start accepts. Automaton has 8921 states and 39815 transitions. Word has length 33 [2021-06-05 15:09:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:44,089 INFO L482 AbstractCegarLoop]: Abstraction has 8921 states and 39815 transitions. [2021-06-05 15:09:44,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:44,089 INFO L276 IsEmpty]: Start isEmpty. Operand 8921 states and 39815 transitions. [2021-06-05 15:09:44,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:44,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:44,103 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, 1, 1, 1] [2021-06-05 15:09:44,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 15:09:44,303 INFO L430 AbstractCegarLoop]: === Iteration 234 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:44,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:44,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1573791708, now seen corresponding path program 153 times [2021-06-05 15:09:44,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:44,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469679312] [2021-06-05 15:09:44,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:44,465 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 15:09:44,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:44,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469679312] [2021-06-05 15:09:44,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469679312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:44,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331383735] [2021-06-05 15:09:44,465 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 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 15:09:44,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:09:44,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:44,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:44,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:44,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:44,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 15:09:44,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:44,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:44,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:44,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 15:09:44,847 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 15:09:44,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331383735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:44,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:44,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:09:44,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935948009] [2021-06-05 15:09:44,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:09:44,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:44,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:09:44,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:09:44,848 INFO L87 Difference]: Start difference. First operand 8921 states and 39815 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:46,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:46,484 INFO L93 Difference]: Finished difference Result 9494 states and 41998 transitions. [2021-06-05 15:09:46,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:09:46,485 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:46,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:46,507 INFO L225 Difference]: With dead ends: 9494 [2021-06-05 15:09:46,508 INFO L226 Difference]: Without dead ends: 9477 [2021-06-05 15:09:46,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1509.9ms TimeCoverageRelationStatistics Valid=422, Invalid=1834, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:09:46,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-06-05 15:09:46,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 8930. [2021-06-05 15:09:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8930 states, 8929 states have (on average 4.461641841191623) internal successors, (39838), 8929 states have internal predecessors, (39838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:46,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8930 states to 8930 states and 39838 transitions. [2021-06-05 15:09:46,663 INFO L78 Accepts]: Start accepts. Automaton has 8930 states and 39838 transitions. Word has length 33 [2021-06-05 15:09:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:46,663 INFO L482 AbstractCegarLoop]: Abstraction has 8930 states and 39838 transitions. [2021-06-05 15:09:46,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:46,663 INFO L276 IsEmpty]: Start isEmpty. Operand 8930 states and 39838 transitions. [2021-06-05 15:09:46,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:46,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:46,678 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, 1, 1, 1] [2021-06-05 15:09:46,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:46,881 INFO L430 AbstractCegarLoop]: === Iteration 235 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:46,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:46,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1520405188, now seen corresponding path program 154 times [2021-06-05 15:09:46,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:46,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783285959] [2021-06-05 15:09:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:47,137 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 15:09:47,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:47,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783285959] [2021-06-05 15:09:47,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783285959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:47,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150644578] [2021-06-05 15:09:47,137 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 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 15:09:47,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:47,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:47,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:47,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:47,288 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 15:09:47,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:47,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:47,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:47,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 15:09:47,380 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 15:09:47,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150644578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:47,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:47,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:09:47,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272257668] [2021-06-05 15:09:47,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:47,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:47,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:47,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:47,382 INFO L87 Difference]: Start difference. First operand 8930 states and 39838 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:09:49,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:49,697 INFO L93 Difference]: Finished difference Result 10827 states and 46571 transitions. [2021-06-05 15:09:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:09:49,697 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:09:49,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:49,721 INFO L225 Difference]: With dead ends: 10827 [2021-06-05 15:09:49,722 INFO L226 Difference]: Without dead ends: 10766 [2021-06-05 15:09:49,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 2116.2ms TimeCoverageRelationStatistics Valid=583, Invalid=2497, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:09:49,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10766 states. [2021-06-05 15:09:49,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10766 to 9008. [2021-06-05 15:09:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9008 states, 9007 states have (on average 4.469856778061508) internal successors, (40260), 9007 states have internal predecessors, (40260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9008 states to 9008 states and 40260 transitions. [2021-06-05 15:09:49,893 INFO L78 Accepts]: Start accepts. Automaton has 9008 states and 40260 transitions. Word has length 33 [2021-06-05 15:09:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:49,893 INFO L482 AbstractCegarLoop]: Abstraction has 9008 states and 40260 transitions. [2021-06-05 15:09:49,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:09:49,893 INFO L276 IsEmpty]: Start isEmpty. Operand 9008 states and 40260 transitions. [2021-06-05 15:09:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:49,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:49,908 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, 1, 1, 1] [2021-06-05 15:09:50,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:50,108 INFO L430 AbstractCegarLoop]: === Iteration 236 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:50,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:50,109 INFO L82 PathProgramCache]: Analyzing trace with hash -711733012, now seen corresponding path program 155 times [2021-06-05 15:09:50,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:50,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216547566] [2021-06-05 15:09:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:50,349 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 15:09:50,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:50,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216547566] [2021-06-05 15:09:50,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216547566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:50,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749792027] [2021-06-05 15:09:50,349 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 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 15:09:50,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:09:50,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:50,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:50,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:50,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:50,509 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 29 treesize of output 13 [2021-06-05 15:09:50,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:50,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:50,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:50,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:09:50,606 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 15:09:50,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749792027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:50,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:50,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:09:50,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64202485] [2021-06-05 15:09:50,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:09:50,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:50,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:09:50,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:09:50,607 INFO L87 Difference]: Start difference. First operand 9008 states and 40260 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:51,597 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 15:09:53,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:53,711 INFO L93 Difference]: Finished difference Result 10559 states and 45889 transitions. [2021-06-05 15:09:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:09:53,711 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:53,735 INFO L225 Difference]: With dead ends: 10559 [2021-06-05 15:09:53,735 INFO L226 Difference]: Without dead ends: 10501 [2021-06-05 15:09:53,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 2736.5ms TimeCoverageRelationStatistics Valid=528, Invalid=3132, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:09:53,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-06-05 15:09:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 9005. [2021-06-05 15:09:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9005 states, 9004 states have (on average 4.470346512661039) internal successors, (40251), 9004 states have internal predecessors, (40251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9005 states to 9005 states and 40251 transitions. [2021-06-05 15:09:53,900 INFO L78 Accepts]: Start accepts. Automaton has 9005 states and 40251 transitions. Word has length 33 [2021-06-05 15:09:53,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:53,900 INFO L482 AbstractCegarLoop]: Abstraction has 9005 states and 40251 transitions. [2021-06-05 15:09:53,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:53,900 INFO L276 IsEmpty]: Start isEmpty. Operand 9005 states and 40251 transitions. [2021-06-05 15:09:53,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:53,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:53,915 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, 1, 1, 1] [2021-06-05 15:09:54,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 15:09:54,115 INFO L430 AbstractCegarLoop]: === Iteration 237 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:54,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:54,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1064872502, now seen corresponding path program 156 times [2021-06-05 15:09:54,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:54,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889105521] [2021-06-05 15:09:54,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:54,358 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 15:09:54,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:54,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889105521] [2021-06-05 15:09:54,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889105521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:54,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707492528] [2021-06-05 15:09:54,359 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 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 15:09:54,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:09:54,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:54,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:54,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:54,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:54,562 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:09:54,563 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 29 treesize of output 57 [2021-06-05 15:09:54,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:54,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:54,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:54,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 15:09:54,754 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 15:09:54,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707492528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:54,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:54,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:09:54,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124936015] [2021-06-05 15:09:54,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:09:54,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:54,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:09:54,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:09:54,755 INFO L87 Difference]: Start difference. First operand 9005 states and 40251 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:56,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:56,813 INFO L93 Difference]: Finished difference Result 9567 states and 42334 transitions. [2021-06-05 15:09:56,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:09:56,814 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:09:56,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:56,836 INFO L225 Difference]: With dead ends: 9567 [2021-06-05 15:09:56,837 INFO L226 Difference]: Without dead ends: 9521 [2021-06-05 15:09:56,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1910.1ms TimeCoverageRelationStatistics Valid=342, Invalid=2010, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:09:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9521 states. [2021-06-05 15:09:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9521 to 9011. [2021-06-05 15:09:57,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9011 states, 9010 states have (on average 4.4687014428412875) internal successors, (40263), 9010 states have internal predecessors, (40263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:57,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9011 states to 9011 states and 40263 transitions. [2021-06-05 15:09:57,070 INFO L78 Accepts]: Start accepts. Automaton has 9011 states and 40263 transitions. Word has length 33 [2021-06-05 15:09:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:57,070 INFO L482 AbstractCegarLoop]: Abstraction has 9011 states and 40263 transitions. [2021-06-05 15:09:57,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:57,070 INFO L276 IsEmpty]: Start isEmpty. Operand 9011 states and 40263 transitions. [2021-06-05 15:09:57,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:09:57,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:57,084 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, 1, 1, 1] [2021-06-05 15:09:57,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 15:09:57,289 INFO L430 AbstractCegarLoop]: === Iteration 238 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:57,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1253714068, now seen corresponding path program 157 times [2021-06-05 15:09:57,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:57,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889414339] [2021-06-05 15:09:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:57,528 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 15:09:57,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:57,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889414339] [2021-06-05 15:09:57,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889414339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:57,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047884060] [2021-06-05 15:09:57,528 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 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 15:09:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:57,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:09:57,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:57,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:57,683 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 29 treesize of output 13 [2021-06-05 15:09:57,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:57,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:57,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:57,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:09:57,780 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 15:09:57,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047884060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:57,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:57,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:09:57,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005701986] [2021-06-05 15:09:57,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:09:57,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:57,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:09:57,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:09:57,781 INFO L87 Difference]: Start difference. First operand 9011 states and 40263 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:00,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:00,010 INFO L93 Difference]: Finished difference Result 9853 states and 43487 transitions. [2021-06-05 15:10:00,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:10:00,010 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:00,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:00,034 INFO L225 Difference]: With dead ends: 9853 [2021-06-05 15:10:00,035 INFO L226 Difference]: Without dead ends: 9815 [2021-06-05 15:10:00,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1973.8ms TimeCoverageRelationStatistics Valid=552, Invalid=2754, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:10:00,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9815 states. [2021-06-05 15:10:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9815 to 8999. [2021-06-05 15:10:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8999 states, 8998 states have (on average 4.470326739275395) internal successors, (40224), 8998 states have internal predecessors, (40224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8999 states to 8999 states and 40224 transitions. [2021-06-05 15:10:00,185 INFO L78 Accepts]: Start accepts. Automaton has 8999 states and 40224 transitions. Word has length 33 [2021-06-05 15:10:00,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:00,185 INFO L482 AbstractCegarLoop]: Abstraction has 8999 states and 40224 transitions. [2021-06-05 15:10:00,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 8999 states and 40224 transitions. [2021-06-05 15:10:00,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:00,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:00,199 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, 1, 1, 1] [2021-06-05 15:10:00,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:00,400 INFO L430 AbstractCegarLoop]: === Iteration 239 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:00,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1760505414, now seen corresponding path program 158 times [2021-06-05 15:10:00,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:00,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749032930] [2021-06-05 15:10:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:00,576 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 15:10:00,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:00,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749032930] [2021-06-05 15:10:00,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749032930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:00,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991962505] [2021-06-05 15:10:00,576 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 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 15:10:00,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:00,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:00,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:00,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:00,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:00,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 15:10:00,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:00,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:00,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:00,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 15:10:00,978 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 15:10:00,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991962505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:00,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:00,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:10:00,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299431395] [2021-06-05 15:10:00,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:10:00,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:00,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:10:00,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:10:00,979 INFO L87 Difference]: Start difference. First operand 8999 states and 40224 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:02,756 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-05 15:10:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:02,973 INFO L93 Difference]: Finished difference Result 9972 states and 43938 transitions. [2021-06-05 15:10:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:10:02,973 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:02,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:02,996 INFO L225 Difference]: With dead ends: 9972 [2021-06-05 15:10:02,996 INFO L226 Difference]: Without dead ends: 9941 [2021-06-05 15:10:02,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1807.3ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:10:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9941 states. [2021-06-05 15:10:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9941 to 9060. [2021-06-05 15:10:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9060 states, 9059 states have (on average 4.470581741914119) internal successors, (40499), 9059 states have internal predecessors, (40499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9060 states to 9060 states and 40499 transitions. [2021-06-05 15:10:03,162 INFO L78 Accepts]: Start accepts. Automaton has 9060 states and 40499 transitions. Word has length 33 [2021-06-05 15:10:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:03,162 INFO L482 AbstractCegarLoop]: Abstraction has 9060 states and 40499 transitions. [2021-06-05 15:10:03,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 9060 states and 40499 transitions. [2021-06-05 15:10:03,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:03,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:03,177 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, 1, 1, 1] [2021-06-05 15:10:03,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 15:10:03,377 INFO L430 AbstractCegarLoop]: === Iteration 240 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:03,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:03,378 INFO L82 PathProgramCache]: Analyzing trace with hash -457232808, now seen corresponding path program 159 times [2021-06-05 15:10:03,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:03,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332587522] [2021-06-05 15:10:03,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:03,549 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 15:10:03,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:03,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332587522] [2021-06-05 15:10:03,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332587522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:03,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752215895] [2021-06-05 15:10:03,550 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 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 15:10:03,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:10:03,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:03,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:03,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:03,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:03,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:03,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:03,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:03,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:03,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:10:03,918 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 15:10:03,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752215895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:03,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:03,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:10:03,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486783223] [2021-06-05 15:10:03,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:10:03,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:03,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:10:03,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:10:03,919 INFO L87 Difference]: Start difference. First operand 9060 states and 40499 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:05,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:05,376 INFO L93 Difference]: Finished difference Result 9717 states and 42930 transitions. [2021-06-05 15:10:05,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:10:05,377 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:05,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:05,401 INFO L225 Difference]: With dead ends: 9717 [2021-06-05 15:10:05,401 INFO L226 Difference]: Without dead ends: 9700 [2021-06-05 15:10:05,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1316.5ms TimeCoverageRelationStatistics Valid=378, Invalid=1602, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:10:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9700 states. [2021-06-05 15:10:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9700 to 9069. [2021-06-05 15:10:05,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9069 states, 9068 states have (on average 4.468681076312307) internal successors, (40522), 9068 states have internal predecessors, (40522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9069 states to 9069 states and 40522 transitions. [2021-06-05 15:10:05,626 INFO L78 Accepts]: Start accepts. Automaton has 9069 states and 40522 transitions. Word has length 33 [2021-06-05 15:10:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:05,626 INFO L482 AbstractCegarLoop]: Abstraction has 9069 states and 40522 transitions. [2021-06-05 15:10:05,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:05,626 INFO L276 IsEmpty]: Start isEmpty. Operand 9069 states and 40522 transitions. [2021-06-05 15:10:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:05,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:05,642 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, 1, 1, 1] [2021-06-05 15:10:05,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:05,842 INFO L430 AbstractCegarLoop]: === Iteration 241 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:05,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:05,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1356594880, now seen corresponding path program 160 times [2021-06-05 15:10:05,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:05,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241248633] [2021-06-05 15:10:05,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:06,100 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 15:10:06,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:06,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241248633] [2021-06-05 15:10:06,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241248633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:06,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812557889] [2021-06-05 15:10:06,101 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 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 15:10:06,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:06,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:06,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:06,255 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 29 treesize of output 13 [2021-06-05 15:10:06,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:06,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:06,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:06,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:10:06,353 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 15:10:06,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812557889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:06,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:06,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:10:06,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587330342] [2021-06-05 15:10:06,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:06,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:06,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:06,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:06,354 INFO L87 Difference]: Start difference. First operand 9069 states and 40522 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:07,457 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-06-05 15:10:09,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:09,255 INFO L93 Difference]: Finished difference Result 10775 states and 47257 transitions. [2021-06-05 15:10:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 15:10:09,255 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:09,279 INFO L225 Difference]: With dead ends: 10775 [2021-06-05 15:10:09,280 INFO L226 Difference]: Without dead ends: 10729 [2021-06-05 15:10:09,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 2438.7ms TimeCoverageRelationStatistics Valid=637, Invalid=3145, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:10:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10729 states. [2021-06-05 15:10:09,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10729 to 9127. [2021-06-05 15:10:09,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9127 states, 9126 states have (on average 4.471838702607934) internal successors, (40810), 9126 states have internal predecessors, (40810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9127 states to 9127 states and 40810 transitions. [2021-06-05 15:10:09,448 INFO L78 Accepts]: Start accepts. Automaton has 9127 states and 40810 transitions. Word has length 33 [2021-06-05 15:10:09,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:09,448 INFO L482 AbstractCegarLoop]: Abstraction has 9127 states and 40810 transitions. [2021-06-05 15:10:09,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:09,448 INFO L276 IsEmpty]: Start isEmpty. Operand 9127 states and 40810 transitions. [2021-06-05 15:10:09,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:09,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:09,463 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, 1, 1, 1] [2021-06-05 15:10:09,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:09,663 INFO L430 AbstractCegarLoop]: === Iteration 242 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:09,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:09,664 INFO L82 PathProgramCache]: Analyzing trace with hash -510619328, now seen corresponding path program 161 times [2021-06-05 15:10:09,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:09,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448825244] [2021-06-05 15:10:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:09,992 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 15:10:09,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:09,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448825244] [2021-06-05 15:10:09,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448825244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:09,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067393587] [2021-06-05 15:10:09,992 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 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 15:10:10,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:10:10,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:10,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:10,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:10,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 15:10:10,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:10,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:10,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:10,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 15:10:10,236 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 15:10:10,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067393587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:10,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:10,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:10:10,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424777225] [2021-06-05 15:10:10,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:10,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:10,237 INFO L87 Difference]: Start difference. First operand 9127 states and 40810 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:10:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:12,473 INFO L93 Difference]: Finished difference Result 11103 states and 47759 transitions. [2021-06-05 15:10:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:10:12,474 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:10:12,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:12,499 INFO L225 Difference]: With dead ends: 11103 [2021-06-05 15:10:12,499 INFO L226 Difference]: Without dead ends: 11006 [2021-06-05 15:10:12,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 2055.0ms TimeCoverageRelationStatistics Valid=563, Invalid=2407, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:10:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11006 states. [2021-06-05 15:10:12,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11006 to 9115. [2021-06-05 15:10:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9115 states, 9114 states have (on average 4.4738863287250386) internal successors, (40775), 9114 states have internal predecessors, (40775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:12,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9115 states to 9115 states and 40775 transitions. [2021-06-05 15:10:12,678 INFO L78 Accepts]: Start accepts. Automaton has 9115 states and 40775 transitions. Word has length 33 [2021-06-05 15:10:12,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:12,678 INFO L482 AbstractCegarLoop]: Abstraction has 9115 states and 40775 transitions. [2021-06-05 15:10:12,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:10:12,678 INFO L276 IsEmpty]: Start isEmpty. Operand 9115 states and 40775 transitions. [2021-06-05 15:10:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:12,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:12,693 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, 1, 1, 1] [2021-06-05 15:10:12,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 15:10:12,893 INFO L430 AbstractCegarLoop]: === Iteration 243 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:12,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1241273094, now seen corresponding path program 162 times [2021-06-05 15:10:12,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:12,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034662852] [2021-06-05 15:10:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:13,074 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 15:10:13,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:13,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034662852] [2021-06-05 15:10:13,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034662852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:13,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680194447] [2021-06-05 15:10:13,075 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 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 15:10:13,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:10:13,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:13,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:13,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:13,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:13,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:13,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:13,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:13,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:13,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:10:13,475 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 15:10:13,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680194447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:13,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:13,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:10:13,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164899708] [2021-06-05 15:10:13,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:10:13,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:13,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:10:13,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:10:13,476 INFO L87 Difference]: Start difference. First operand 9115 states and 40775 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:14,233 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-06-05 15:10:15,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:15,186 INFO L93 Difference]: Finished difference Result 9986 states and 44329 transitions. [2021-06-05 15:10:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:10:15,186 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:15,209 INFO L225 Difference]: With dead ends: 9986 [2021-06-05 15:10:15,209 INFO L226 Difference]: Without dead ends: 9934 [2021-06-05 15:10:15,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1505.2ms TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:10:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9934 states. [2021-06-05 15:10:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9934 to 9100. [2021-06-05 15:10:15,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9100 states, 9099 states have (on average 4.475876469941752) internal successors, (40726), 9099 states have internal predecessors, (40726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9100 states to 9100 states and 40726 transitions. [2021-06-05 15:10:15,366 INFO L78 Accepts]: Start accepts. Automaton has 9100 states and 40726 transitions. Word has length 33 [2021-06-05 15:10:15,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:15,366 INFO L482 AbstractCegarLoop]: Abstraction has 9100 states and 40726 transitions. [2021-06-05 15:10:15,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 9100 states and 40726 transitions. [2021-06-05 15:10:15,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:15,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:15,381 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, 1, 1, 1] [2021-06-05 15:10:15,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 15:10:15,582 INFO L430 AbstractCegarLoop]: === Iteration 244 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:15,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:15,582 INFO L82 PathProgramCache]: Analyzing trace with hash 674275410, now seen corresponding path program 163 times [2021-06-05 15:10:15,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:15,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742513593] [2021-06-05 15:10:15,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:15,778 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 15:10:15,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:15,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742513593] [2021-06-05 15:10:15,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742513593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:15,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701569432] [2021-06-05 15:10:15,779 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 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 15:10:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:15,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:15,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:15,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:15,960 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 28 treesize of output 12 [2021-06-05 15:10:15,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:15,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:15,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:15,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:10:16,036 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 15:10:16,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701569432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:16,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:16,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:10:16,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820020379] [2021-06-05 15:10:16,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:16,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:16,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:16,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:16,037 INFO L87 Difference]: Start difference. First operand 9100 states and 40726 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:17,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:17,799 INFO L93 Difference]: Finished difference Result 10911 states and 47722 transitions. [2021-06-05 15:10:17,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:10:17,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:17,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:17,825 INFO L225 Difference]: With dead ends: 10911 [2021-06-05 15:10:17,826 INFO L226 Difference]: Without dead ends: 10849 [2021-06-05 15:10:17,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1356.3ms TimeCoverageRelationStatistics Valid=427, Invalid=2653, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:10:17,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10849 states. [2021-06-05 15:10:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10849 to 9285. [2021-06-05 15:10:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9285 states, 9284 states have (on average 4.47824213700991) internal successors, (41576), 9284 states have internal predecessors, (41576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9285 states to 9285 states and 41576 transitions. [2021-06-05 15:10:17,995 INFO L78 Accepts]: Start accepts. Automaton has 9285 states and 41576 transitions. Word has length 33 [2021-06-05 15:10:17,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:17,995 INFO L482 AbstractCegarLoop]: Abstraction has 9285 states and 41576 transitions. [2021-06-05 15:10:17,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:17,996 INFO L276 IsEmpty]: Start isEmpty. Operand 9285 states and 41576 transitions. [2021-06-05 15:10:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:18,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:18,011 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, 1, 1, 1] [2021-06-05 15:10:18,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 15:10:18,211 INFO L430 AbstractCegarLoop]: === Iteration 245 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:18,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1977548016, now seen corresponding path program 164 times [2021-06-05 15:10:18,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:18,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164695392] [2021-06-05 15:10:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:18,462 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 15:10:18,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:18,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164695392] [2021-06-05 15:10:18,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164695392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:18,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152707623] [2021-06-05 15:10:18,462 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 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 15:10:18,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:18,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:18,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:18,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:18,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:18,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:10:18,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:18,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:18,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:18,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 15:10:18,835 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 15:10:18,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152707623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:18,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:18,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:10:18,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366440914] [2021-06-05 15:10:18,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:10:18,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:18,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:10:18,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:10:18,836 INFO L87 Difference]: Start difference. First operand 9285 states and 41576 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:20,117 INFO L93 Difference]: Finished difference Result 10160 states and 44849 transitions. [2021-06-05 15:10:20,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:10:20,118 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:20,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:20,141 INFO L225 Difference]: With dead ends: 10160 [2021-06-05 15:10:20,142 INFO L226 Difference]: Without dead ends: 10143 [2021-06-05 15:10:20,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1204.4ms TimeCoverageRelationStatistics Valid=314, Invalid=1408, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:10:20,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10143 states. [2021-06-05 15:10:20,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10143 to 9285. [2021-06-05 15:10:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9285 states, 9284 states have (on average 4.4774881516587675) internal successors, (41569), 9284 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 15:10:20,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9285 states to 9285 states and 41569 transitions. [2021-06-05 15:10:20,302 INFO L78 Accepts]: Start accepts. Automaton has 9285 states and 41569 transitions. Word has length 33 [2021-06-05 15:10:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:20,302 INFO L482 AbstractCegarLoop]: Abstraction has 9285 states and 41569 transitions. [2021-06-05 15:10:20,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:20,302 INFO L276 IsEmpty]: Start isEmpty. Operand 9285 states and 41569 transitions. [2021-06-05 15:10:20,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:20,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:20,317 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, 1, 1, 1] [2021-06-05 15:10:20,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-06-05 15:10:20,517 INFO L430 AbstractCegarLoop]: === Iteration 246 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:20,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:20,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1078185944, now seen corresponding path program 165 times [2021-06-05 15:10:20,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:20,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052275363] [2021-06-05 15:10:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:20,764 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 15:10:20,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:20,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052275363] [2021-06-05 15:10:20,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052275363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:20,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994249771] [2021-06-05 15:10:20,765 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 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 15:10:20,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:10:20,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:20,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:10:20,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:20,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:20,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:20,946 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 24 treesize of output 30 [2021-06-05 15:10:20,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:20,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:20,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:20,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 15:10:21,109 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 15:10:21,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994249771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:21,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:21,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:10:21,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504028906] [2021-06-05 15:10:21,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:10:21,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:21,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:10:21,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:10:21,111 INFO L87 Difference]: Start difference. First operand 9285 states and 41569 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:21,373 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-06-05 15:10:22,609 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 15:10:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:24,549 INFO L93 Difference]: Finished difference Result 10613 states and 46491 transitions. [2021-06-05 15:10:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 15:10:24,549 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:24,574 INFO L225 Difference]: With dead ends: 10613 [2021-06-05 15:10:24,575 INFO L226 Difference]: Without dead ends: 10567 [2021-06-05 15:10:24,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 2960.2ms TimeCoverageRelationStatistics Valid=599, Invalid=4093, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:10:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10567 states. [2021-06-05 15:10:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10567 to 9376. [2021-06-05 15:10:24,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9376 states, 9375 states have (on average 4.477973333333333) internal successors, (41981), 9375 states have internal predecessors, (41981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9376 states to 9376 states and 41981 transitions. [2021-06-05 15:10:24,750 INFO L78 Accepts]: Start accepts. Automaton has 9376 states and 41981 transitions. Word has length 33 [2021-06-05 15:10:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:24,750 INFO L482 AbstractCegarLoop]: Abstraction has 9376 states and 41981 transitions. [2021-06-05 15:10:24,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 9376 states and 41981 transitions. [2021-06-05 15:10:24,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:24,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:24,766 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, 1, 1, 1] [2021-06-05 15:10:24,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 15:10:24,967 INFO L430 AbstractCegarLoop]: === Iteration 247 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:24,967 INFO L82 PathProgramCache]: Analyzing trace with hash -702412358, now seen corresponding path program 166 times [2021-06-05 15:10:24,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:24,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103741189] [2021-06-05 15:10:24,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:25,245 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 15:10:25,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:25,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103741189] [2021-06-05 15:10:25,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103741189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:25,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572576838] [2021-06-05 15:10:25,246 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 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 15:10:25,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:25,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:25,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:25,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:25,421 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 15:10:25,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:25,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:25,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:25,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:10:25,500 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 15:10:25,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572576838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:25,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:25,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:10:25,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530763303] [2021-06-05 15:10:25,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:25,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:25,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:25,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:25,501 INFO L87 Difference]: Start difference. First operand 9376 states and 41981 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:27,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:27,956 INFO L93 Difference]: Finished difference Result 11136 states and 48659 transitions. [2021-06-05 15:10:27,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:10:27,957 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:27,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:27,983 INFO L225 Difference]: With dead ends: 11136 [2021-06-05 15:10:27,983 INFO L226 Difference]: Without dead ends: 11063 [2021-06-05 15:10:27,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 2007.3ms TimeCoverageRelationStatistics Valid=591, Invalid=2949, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:10:27,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11063 states. [2021-06-05 15:10:28,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11063 to 9339. [2021-06-05 15:10:28,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9339 states, 9338 states have (on average 4.4790104947526235) internal successors, (41825), 9338 states have internal predecessors, (41825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9339 states to 9339 states and 41825 transitions. [2021-06-05 15:10:28,156 INFO L78 Accepts]: Start accepts. Automaton has 9339 states and 41825 transitions. Word has length 33 [2021-06-05 15:10:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:28,156 INFO L482 AbstractCegarLoop]: Abstraction has 9339 states and 41825 transitions. [2021-06-05 15:10:28,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 9339 states and 41825 transitions. [2021-06-05 15:10:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:28,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:28,172 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, 1, 1, 1] [2021-06-05 15:10:28,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 15:10:28,372 INFO L430 AbstractCegarLoop]: === Iteration 248 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:28,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1193507730, now seen corresponding path program 167 times [2021-06-05 15:10:28,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:28,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386158556] [2021-06-05 15:10:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:28,552 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 15:10:28,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:28,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386158556] [2021-06-05 15:10:28,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386158556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:28,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344904089] [2021-06-05 15:10:28,553 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 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 15:10:28,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:10:28,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:28,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:28,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:28,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:28,755 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 28 treesize of output 12 [2021-06-05 15:10:28,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:28,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:28,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:28,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:10:28,833 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 15:10:28,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344904089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:28,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:28,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:10:28,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390640515] [2021-06-05 15:10:28,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:28,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:28,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:28,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:28,834 INFO L87 Difference]: Start difference. First operand 9339 states and 41825 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:30,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:30,696 INFO L93 Difference]: Finished difference Result 10634 states and 46892 transitions. [2021-06-05 15:10:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:10:30,697 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:30,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:30,722 INFO L225 Difference]: With dead ends: 10634 [2021-06-05 15:10:30,722 INFO L226 Difference]: Without dead ends: 10542 [2021-06-05 15:10:30,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1366.5ms TimeCoverageRelationStatistics Valid=285, Invalid=2265, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:10:30,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10542 states. [2021-06-05 15:10:30,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10542 to 9327. [2021-06-05 15:10:30,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9327 states, 9326 states have (on average 4.478876259918508) internal successors, (41770), 9326 states have internal predecessors, (41770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9327 states to 9327 states and 41770 transitions. [2021-06-05 15:10:30,880 INFO L78 Accepts]: Start accepts. Automaton has 9327 states and 41770 transitions. Word has length 33 [2021-06-05 15:10:30,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:30,880 INFO L482 AbstractCegarLoop]: Abstraction has 9327 states and 41770 transitions. [2021-06-05 15:10:30,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand 9327 states and 41770 transitions. [2021-06-05 15:10:30,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:30,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:30,896 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, 1, 1, 1] [2021-06-05 15:10:31,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:31,096 INFO L430 AbstractCegarLoop]: === Iteration 249 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:31,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:31,096 INFO L82 PathProgramCache]: Analyzing trace with hash 949591160, now seen corresponding path program 168 times [2021-06-05 15:10:31,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:31,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206978321] [2021-06-05 15:10:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:31,270 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 15:10:31,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:31,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206978321] [2021-06-05 15:10:31,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206978321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:31,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949357826] [2021-06-05 15:10:31,270 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 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 15:10:31,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:10:31,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:31,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:31,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:31,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:31,658 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:10:31,659 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 33 treesize of output 61 [2021-06-05 15:10:31,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:10:31,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:31,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:31,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-06-05 15:10:31,780 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 15:10:31,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949357826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:31,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:31,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:10:31,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304504576] [2021-06-05 15:10:31,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:10:31,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:31,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:10:31,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:10:31,781 INFO L87 Difference]: Start difference. First operand 9327 states and 41770 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:33,258 INFO L93 Difference]: Finished difference Result 10072 states and 44663 transitions. [2021-06-05 15:10:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:10:33,259 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:33,283 INFO L225 Difference]: With dead ends: 10072 [2021-06-05 15:10:33,283 INFO L226 Difference]: Without dead ends: 10018 [2021-06-05 15:10:33,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1178.1ms TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:10:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10018 states. [2021-06-05 15:10:33,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10018 to 9312. [2021-06-05 15:10:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9312 states, 9311 states have (on average 4.480077327891741) internal successors, (41714), 9311 states have internal predecessors, (41714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9312 states to 9312 states and 41714 transitions. [2021-06-05 15:10:33,444 INFO L78 Accepts]: Start accepts. Automaton has 9312 states and 41714 transitions. Word has length 33 [2021-06-05 15:10:33,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:33,444 INFO L482 AbstractCegarLoop]: Abstraction has 9312 states and 41714 transitions. [2021-06-05 15:10:33,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:33,444 INFO L276 IsEmpty]: Start isEmpty. Operand 9312 states and 41714 transitions. [2021-06-05 15:10:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:33,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:33,459 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, 1, 1, 1] [2021-06-05 15:10:33,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:33,660 INFO L430 AbstractCegarLoop]: === Iteration 250 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:33,660 INFO L82 PathProgramCache]: Analyzing trace with hash 832695546, now seen corresponding path program 169 times [2021-06-05 15:10:33,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:33,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832861618] [2021-06-05 15:10:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:33,851 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 15:10:33,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:33,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832861618] [2021-06-05 15:10:33,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832861618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:33,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486617169] [2021-06-05 15:10:33,852 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 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 15:10:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:33,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:33,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:34,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:34,037 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 28 treesize of output 12 [2021-06-05 15:10:34,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:34,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:34,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:34,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:10:34,112 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 15:10:34,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486617169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:34,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:34,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:10:34,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380475342] [2021-06-05 15:10:34,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:34,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:34,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:34,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:34,113 INFO L87 Difference]: Start difference. First operand 9312 states and 41714 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:35,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:35,994 INFO L93 Difference]: Finished difference Result 11553 states and 50585 transitions. [2021-06-05 15:10:35,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:10:35,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:35,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:36,020 INFO L225 Difference]: With dead ends: 11553 [2021-06-05 15:10:36,021 INFO L226 Difference]: Without dead ends: 11515 [2021-06-05 15:10:36,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1452.2ms TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:10:36,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11515 states. [2021-06-05 15:10:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11515 to 9457. [2021-06-05 15:10:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9457 states, 9456 states have (on average 4.486146362098139) internal successors, (42421), 9456 states have internal predecessors, (42421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9457 states to 9457 states and 42421 transitions. [2021-06-05 15:10:36,218 INFO L78 Accepts]: Start accepts. Automaton has 9457 states and 42421 transitions. Word has length 33 [2021-06-05 15:10:36,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:36,218 INFO L482 AbstractCegarLoop]: Abstraction has 9457 states and 42421 transitions. [2021-06-05 15:10:36,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:36,218 INFO L276 IsEmpty]: Start isEmpty. Operand 9457 states and 42421 transitions. [2021-06-05 15:10:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:36,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:36,234 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, 1, 1, 1] [2021-06-05 15:10:36,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 15:10:36,437 INFO L430 AbstractCegarLoop]: === Iteration 251 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:36,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:36,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2135968152, now seen corresponding path program 170 times [2021-06-05 15:10:36,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:36,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67015172] [2021-06-05 15:10:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:36,595 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 15:10:36,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:36,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67015172] [2021-06-05 15:10:36,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67015172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:36,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483723503] [2021-06-05 15:10:36,595 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 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 15:10:36,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:36,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:36,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:10:36,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:36,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:36,773 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 15:10:36,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:36,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:36,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:36,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-05 15:10:36,917 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 15:10:36,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483723503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:36,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:36,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:10:36,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668508731] [2021-06-05 15:10:36,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:10:36,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:36,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:10:36,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:10:36,918 INFO L87 Difference]: Start difference. First operand 9457 states and 42421 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:37,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:37,848 INFO L93 Difference]: Finished difference Result 10316 states and 45782 transitions. [2021-06-05 15:10:37,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:10:37,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:37,873 INFO L225 Difference]: With dead ends: 10316 [2021-06-05 15:10:37,873 INFO L226 Difference]: Without dead ends: 10303 [2021-06-05 15:10:37,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 781.8ms TimeCoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:10:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10303 states. [2021-06-05 15:10:38,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10303 to 9457. [2021-06-05 15:10:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9457 states, 9456 states have (on average 4.48582910321489) internal successors, (42418), 9456 states have internal predecessors, (42418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9457 states to 9457 states and 42418 transitions. [2021-06-05 15:10:38,046 INFO L78 Accepts]: Start accepts. Automaton has 9457 states and 42418 transitions. Word has length 33 [2021-06-05 15:10:38,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:38,046 INFO L482 AbstractCegarLoop]: Abstraction has 9457 states and 42418 transitions. [2021-06-05 15:10:38,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 9457 states and 42418 transitions. [2021-06-05 15:10:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:38,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:38,062 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, 1, 1, 1] [2021-06-05 15:10:38,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-05 15:10:38,262 INFO L430 AbstractCegarLoop]: === Iteration 252 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:38,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:38,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1236606080, now seen corresponding path program 171 times [2021-06-05 15:10:38,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:38,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944667937] [2021-06-05 15:10:38,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:38,435 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 15:10:38,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:38,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944667937] [2021-06-05 15:10:38,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944667937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:38,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242476746] [2021-06-05 15:10:38,435 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 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 15:10:38,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:10:38,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:38,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:10:38,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:38,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:38,664 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:10:38,664 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 27 treesize of output 55 [2021-06-05 15:10:38,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:10:38,708 INFO L628 ElimStorePlain]: treesize reduction 74, result has 22.9 percent of original size [2021-06-05 15:10:38,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:38,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 15:10:38,847 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 15:10:38,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242476746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:38,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:38,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:10:38,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127060866] [2021-06-05 15:10:38,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:10:38,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:38,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:10:38,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:10:38,848 INFO L87 Difference]: Start difference. First operand 9457 states and 42418 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:40,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:40,507 INFO L93 Difference]: Finished difference Result 10791 states and 47563 transitions. [2021-06-05 15:10:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:10:40,507 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:40,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:40,532 INFO L225 Difference]: With dead ends: 10791 [2021-06-05 15:10:40,532 INFO L226 Difference]: Without dead ends: 10755 [2021-06-05 15:10:40,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1180.7ms TimeCoverageRelationStatistics Valid=310, Invalid=2446, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:10:40,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10755 states. [2021-06-05 15:10:40,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10755 to 9459. [2021-06-05 15:10:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9459 states, 9458 states have (on average 4.489532670754916) internal successors, (42462), 9458 states have internal predecessors, (42462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:40,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 42462 transitions. [2021-06-05 15:10:40,708 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 42462 transitions. Word has length 33 [2021-06-05 15:10:40,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:40,708 INFO L482 AbstractCegarLoop]: Abstraction has 9459 states and 42462 transitions. [2021-06-05 15:10:40,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:40,708 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 42462 transitions. [2021-06-05 15:10:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:40,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:40,723 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, 1, 1, 1] [2021-06-05 15:10:40,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 15:10:40,924 INFO L430 AbstractCegarLoop]: === Iteration 253 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:40,924 INFO L82 PathProgramCache]: Analyzing trace with hash -149556568, now seen corresponding path program 172 times [2021-06-05 15:10:40,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:40,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995820816] [2021-06-05 15:10:40,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:41,099 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 15:10:41,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:41,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995820816] [2021-06-05 15:10:41,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995820816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:41,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680674120] [2021-06-05 15:10:41,099 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 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 15:10:41,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:41,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:41,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:41,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:41,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:41,297 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 28 treesize of output 12 [2021-06-05 15:10:41,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:41,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:41,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:41,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:10:41,390 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 15:10:41,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680674120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:41,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:41,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:10:41,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85473393] [2021-06-05 15:10:41,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:41,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:41,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:41,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:41,391 INFO L87 Difference]: Start difference. First operand 9459 states and 42462 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:43,073 INFO L93 Difference]: Finished difference Result 11292 states and 49552 transitions. [2021-06-05 15:10:43,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:10:43,073 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:43,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:43,098 INFO L225 Difference]: With dead ends: 11292 [2021-06-05 15:10:43,099 INFO L226 Difference]: Without dead ends: 11243 [2021-06-05 15:10:43,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1219.4ms TimeCoverageRelationStatistics Valid=293, Invalid=2463, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:10:43,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11243 states. [2021-06-05 15:10:43,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11243 to 9447. [2021-06-05 15:10:43,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9447 states, 9446 states have (on average 4.490366292610629) internal successors, (42416), 9446 states have internal predecessors, (42416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9447 states to 9447 states and 42416 transitions. [2021-06-05 15:10:43,280 INFO L78 Accepts]: Start accepts. Automaton has 9447 states and 42416 transitions. Word has length 33 [2021-06-05 15:10:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:43,280 INFO L482 AbstractCegarLoop]: Abstraction has 9447 states and 42416 transitions. [2021-06-05 15:10:43,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:43,281 INFO L276 IsEmpty]: Start isEmpty. Operand 9447 states and 42416 transitions. [2021-06-05 15:10:43,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:43,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:43,296 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, 1, 1, 1] [2021-06-05 15:10:43,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:43,496 INFO L430 AbstractCegarLoop]: === Iteration 254 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1925899198, now seen corresponding path program 173 times [2021-06-05 15:10:43,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:43,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771641883] [2021-06-05 15:10:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:43,750 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 15:10:43,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:43,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771641883] [2021-06-05 15:10:43,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771641883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:43,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159560069] [2021-06-05 15:10:43,751 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 15:10:43,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:10:43,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:43,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:43,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:43,976 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 15:10:43,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:43,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:43,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:43,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:10:44,038 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 15:10:44,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159560069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:44,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:44,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:10:44,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445073518] [2021-06-05 15:10:44,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:44,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:44,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:44,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:44,039 INFO L87 Difference]: Start difference. First operand 9447 states and 42416 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:45,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:45,212 INFO L93 Difference]: Finished difference Result 10359 states and 46156 transitions. [2021-06-05 15:10:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:10:45,212 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:45,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:45,236 INFO L225 Difference]: With dead ends: 10359 [2021-06-05 15:10:45,236 INFO L226 Difference]: Without dead ends: 10344 [2021-06-05 15:10:45,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 878.9ms TimeCoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:10:45,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10344 states. [2021-06-05 15:10:45,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10344 to 9432. [2021-06-05 15:10:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9432 states, 9431 states have (on average 4.490722086735235) internal successors, (42352), 9431 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9432 states to 9432 states and 42352 transitions. [2021-06-05 15:10:45,397 INFO L78 Accepts]: Start accepts. Automaton has 9432 states and 42352 transitions. Word has length 33 [2021-06-05 15:10:45,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:45,397 INFO L482 AbstractCegarLoop]: Abstraction has 9432 states and 42352 transitions. [2021-06-05 15:10:45,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 9432 states and 42352 transitions. [2021-06-05 15:10:45,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:45,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:45,412 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, 1, 1, 1] [2021-06-05 15:10:45,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2021-06-05 15:10:45,612 INFO L430 AbstractCegarLoop]: === Iteration 255 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:45,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:45,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1512984130, now seen corresponding path program 174 times [2021-06-05 15:10:45,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:45,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469411306] [2021-06-05 15:10:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:45,840 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 15:10:45,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:45,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469411306] [2021-06-05 15:10:45,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469411306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:45,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800489247] [2021-06-05 15:10:45,841 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 15:10:45,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:10:45,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:45,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:45,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:46,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:46,039 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:10:46,040 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 29 treesize of output 57 [2021-06-05 15:10:46,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:46,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:46,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:46,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 15:10:46,271 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 15:10:46,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800489247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:46,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:46,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:10:46,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545012484] [2021-06-05 15:10:46,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:10:46,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:46,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:10:46,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:10:46,272 INFO L87 Difference]: Start difference. First operand 9432 states and 42352 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:48,285 INFO L93 Difference]: Finished difference Result 10465 states and 46438 transitions. [2021-06-05 15:10:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:10:48,286 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:48,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:48,311 INFO L225 Difference]: With dead ends: 10465 [2021-06-05 15:10:48,311 INFO L226 Difference]: Without dead ends: 10434 [2021-06-05 15:10:48,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1534.9ms TimeCoverageRelationStatistics Valid=396, Invalid=2574, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:10:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10434 states. [2021-06-05 15:10:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10434 to 9514. [2021-06-05 15:10:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9514 states, 9513 states have (on average 4.491117418269736) internal successors, (42724), 9513 states have internal predecessors, (42724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:48,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9514 states to 9514 states and 42724 transitions. [2021-06-05 15:10:48,499 INFO L78 Accepts]: Start accepts. Automaton has 9514 states and 42724 transitions. Word has length 33 [2021-06-05 15:10:48,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:48,499 INFO L482 AbstractCegarLoop]: Abstraction has 9514 states and 42724 transitions. [2021-06-05 15:10:48,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:48,499 INFO L276 IsEmpty]: Start isEmpty. Operand 9514 states and 42724 transitions. [2021-06-05 15:10:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:48,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:48,516 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, 1, 1, 1] [2021-06-05 15:10:48,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:48,718 INFO L430 AbstractCegarLoop]: === Iteration 256 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:48,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:48,718 INFO L82 PathProgramCache]: Analyzing trace with hash -209711524, now seen corresponding path program 175 times [2021-06-05 15:10:48,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:48,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651131928] [2021-06-05 15:10:48,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:48,883 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 15:10:48,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:48,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651131928] [2021-06-05 15:10:48,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651131928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:48,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137950036] [2021-06-05 15:10:48,884 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 15:10:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:48,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:48,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:49,034 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 15:10:49,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:49,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:49,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:49,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 15:10:49,130 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 15:10:49,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137950036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:49,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:49,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:10:49,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18774822] [2021-06-05 15:10:49,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:49,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:49,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:49,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:49,131 INFO L87 Difference]: Start difference. First operand 9514 states and 42724 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:50,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:50,356 INFO L93 Difference]: Finished difference Result 10978 states and 48339 transitions. [2021-06-05 15:10:50,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:10:50,357 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:50,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:50,382 INFO L225 Difference]: With dead ends: 10978 [2021-06-05 15:10:50,382 INFO L226 Difference]: Without dead ends: 10950 [2021-06-05 15:10:50,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 963.3ms TimeCoverageRelationStatistics Valid=365, Invalid=1705, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:10:50,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-06-05 15:10:50,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 9645. [2021-06-05 15:10:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9645 states, 9644 states have (on average 4.493674823724596) internal successors, (43337), 9644 states have internal predecessors, (43337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9645 states to 9645 states and 43337 transitions. [2021-06-05 15:10:50,573 INFO L78 Accepts]: Start accepts. Automaton has 9645 states and 43337 transitions. Word has length 33 [2021-06-05 15:10:50,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:50,573 INFO L482 AbstractCegarLoop]: Abstraction has 9645 states and 43337 transitions. [2021-06-05 15:10:50,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:50,574 INFO L276 IsEmpty]: Start isEmpty. Operand 9645 states and 43337 transitions. [2021-06-05 15:10:50,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:50,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:50,589 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, 1, 1, 1] [2021-06-05 15:10:50,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:50,792 INFO L430 AbstractCegarLoop]: === Iteration 257 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:50,792 INFO L82 PathProgramCache]: Analyzing trace with hash -263098044, now seen corresponding path program 176 times [2021-06-05 15:10:50,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:50,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980616156] [2021-06-05 15:10:50,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:50,957 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 15:10:50,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:50,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980616156] [2021-06-05 15:10:50,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980616156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:50,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507516473] [2021-06-05 15:10:50,958 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 15:10:50,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:50,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:50,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:50,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:51,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:51,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:51,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:51,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:51,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:51,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:10:51,312 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 15:10:51,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507516473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:51,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:51,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 15:10:51,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296501277] [2021-06-05 15:10:51,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:51,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:51,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:51,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:51,313 INFO L87 Difference]: Start difference. First operand 9645 states and 43337 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) 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 15:10:51,748 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-06-05 15:10:53,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:53,228 INFO L93 Difference]: Finished difference Result 10301 states and 45864 transitions. [2021-06-05 15:10:53,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:10:53,228 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 33 [2021-06-05 15:10:53,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:53,252 INFO L225 Difference]: With dead ends: 10301 [2021-06-05 15:10:53,252 INFO L226 Difference]: Without dead ends: 10278 [2021-06-05 15:10:53,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1706.7ms TimeCoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:10:53,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10278 states. [2021-06-05 15:10:53,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10278 to 9605. [2021-06-05 15:10:53,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9605 states, 9604 states have (on average 4.4957309454394005) internal successors, (43177), 9604 states have internal predecessors, (43177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:53,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9605 states to 9605 states and 43177 transitions. [2021-06-05 15:10:53,417 INFO L78 Accepts]: Start accepts. Automaton has 9605 states and 43177 transitions. Word has length 33 [2021-06-05 15:10:53,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:53,418 INFO L482 AbstractCegarLoop]: Abstraction has 9605 states and 43177 transitions. [2021-06-05 15:10:53,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) 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 15:10:53,418 INFO L276 IsEmpty]: Start isEmpty. Operand 9605 states and 43177 transitions. [2021-06-05 15:10:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:53,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:53,433 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, 1, 1, 1] [2021-06-05 15:10:53,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-05 15:10:53,634 INFO L430 AbstractCegarLoop]: === Iteration 258 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:53,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1799731052, now seen corresponding path program 177 times [2021-06-05 15:10:53,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:53,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768095370] [2021-06-05 15:10:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:53,813 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 15:10:53,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:53,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768095370] [2021-06-05 15:10:53,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768095370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:53,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196749580] [2021-06-05 15:10:53,814 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 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 15:10:53,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:10:53,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:53,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:53,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:53,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:53,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 15:10:53,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:53,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:53,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:53,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 15:10:54,209 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 15:10:54,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196749580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:54,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:54,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:10:54,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562964935] [2021-06-05 15:10:54,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:10:54,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:54,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:10:54,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:10:54,210 INFO L87 Difference]: Start difference. First operand 9605 states and 43177 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:55,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:55,770 INFO L93 Difference]: Finished difference Result 10199 states and 45589 transitions. [2021-06-05 15:10:55,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:10:55,771 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:10:55,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:55,794 INFO L225 Difference]: With dead ends: 10199 [2021-06-05 15:10:55,794 INFO L226 Difference]: Without dead ends: 10184 [2021-06-05 15:10:55,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1197.2ms TimeCoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:10:55,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10184 states. [2021-06-05 15:10:55,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10184 to 9605. [2021-06-05 15:10:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9605 states, 9604 states have (on average 4.4957309454394005) internal successors, (43177), 9604 states have internal predecessors, (43177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9605 states to 9605 states and 43177 transitions. [2021-06-05 15:10:56,005 INFO L78 Accepts]: Start accepts. Automaton has 9605 states and 43177 transitions. Word has length 33 [2021-06-05 15:10:56,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:56,005 INFO L482 AbstractCegarLoop]: Abstraction has 9605 states and 43177 transitions. [2021-06-05 15:10:56,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 9605 states and 43177 transitions. [2021-06-05 15:10:56,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:56,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:56,020 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, 1, 1, 1] [2021-06-05 15:10:56,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:56,221 INFO L430 AbstractCegarLoop]: === Iteration 259 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:56,221 INFO L82 PathProgramCache]: Analyzing trace with hash -410643446, now seen corresponding path program 178 times [2021-06-05 15:10:56,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:56,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405845714] [2021-06-05 15:10:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:56,387 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 15:10:56,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:56,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405845714] [2021-06-05 15:10:56,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405845714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:56,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68403885] [2021-06-05 15:10:56,387 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 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 15:10:56,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:56,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:56,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:56,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:56,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:56,558 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 29 treesize of output 13 [2021-06-05 15:10:56,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:56,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:56,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:56,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:10:56,649 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 15:10:56,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68403885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:56,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:56,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:10:56,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846390515] [2021-06-05 15:10:56,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:10:56,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:56,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:10:56,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:10:56,650 INFO L87 Difference]: Start difference. First operand 9605 states and 43177 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:10:58,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:58,005 INFO L93 Difference]: Finished difference Result 10671 states and 47260 transitions. [2021-06-05 15:10:58,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:10:58,005 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 15:10:58,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:58,030 INFO L225 Difference]: With dead ends: 10671 [2021-06-05 15:10:58,030 INFO L226 Difference]: Without dead ends: 10647 [2021-06-05 15:10:58,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1077.9ms TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:10:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10647 states. [2021-06-05 15:10:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10647 to 9590. [2021-06-05 15:10:58,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9590 states, 9589 states have (on average 4.496923558243821) internal successors, (43121), 9589 states have internal predecessors, (43121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:58,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9590 states to 9590 states and 43121 transitions. [2021-06-05 15:10:58,206 INFO L78 Accepts]: Start accepts. Automaton has 9590 states and 43121 transitions. Word has length 33 [2021-06-05 15:10:58,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:58,206 INFO L482 AbstractCegarLoop]: Abstraction has 9590 states and 43121 transitions. [2021-06-05 15:10:58,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:10:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 9590 states and 43121 transitions. [2021-06-05 15:10:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:10:58,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:58,222 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, 1, 1, 1] [2021-06-05 15:10:58,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:58,424 INFO L430 AbstractCegarLoop]: === Iteration 260 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:58,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:58,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2054231256, now seen corresponding path program 179 times [2021-06-05 15:10:58,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:58,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305418839] [2021-06-05 15:10:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:58,585 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 15:10:58,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:58,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305418839] [2021-06-05 15:10:58,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305418839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:58,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086087062] [2021-06-05 15:10:58,586 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 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 15:10:58,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:10:58,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:58,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:10:58,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:58,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:58,739 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 29 treesize of output 13 [2021-06-05 15:10:58,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:58,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:58,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:58,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:10:58,831 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 15:10:58,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086087062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:58,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:58,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:10:58,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347053304] [2021-06-05 15:10:58,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:58,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:58,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:58,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:58,832 INFO L87 Difference]: Start difference. First operand 9590 states and 43121 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:00,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:00,084 INFO L93 Difference]: Finished difference Result 10722 states and 47334 transitions. [2021-06-05 15:11:00,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:11:00,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:00,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:00,109 INFO L225 Difference]: With dead ends: 10722 [2021-06-05 15:11:00,109 INFO L226 Difference]: Without dead ends: 10700 [2021-06-05 15:11:00,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 868.3ms TimeCoverageRelationStatistics Valid=344, Invalid=1548, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:11:00,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10700 states. [2021-06-05 15:11:00,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10700 to 9638. [2021-06-05 15:11:00,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9638 states, 9637 states have (on average 4.497353948324167) internal successors, (43341), 9637 states have internal predecessors, (43341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9638 states to 9638 states and 43341 transitions. [2021-06-05 15:11:00,293 INFO L78 Accepts]: Start accepts. Automaton has 9638 states and 43341 transitions. Word has length 33 [2021-06-05 15:11:00,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:00,293 INFO L482 AbstractCegarLoop]: Abstraction has 9638 states and 43341 transitions. [2021-06-05 15:11:00,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 9638 states and 43341 transitions. [2021-06-05 15:11:00,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:00,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:00,311 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, 1, 1, 1] [2021-06-05 15:11:00,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:00,513 INFO L430 AbstractCegarLoop]: === Iteration 261 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:00,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:00,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2000844736, now seen corresponding path program 180 times [2021-06-05 15:11:00,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:00,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384503680] [2021-06-05 15:11:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:00,677 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 15:11:00,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:00,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384503680] [2021-06-05 15:11:00,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384503680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:00,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993603835] [2021-06-05 15:11:00,677 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 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 15:11:00,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:11:00,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:00,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:00,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:00,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:00,869 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:11:00,870 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 29 treesize of output 57 [2021-06-05 15:11:00,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:00,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:00,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:00,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 15:11:01,044 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 15:11:01,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993603835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:01,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:01,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:11:01,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654076889] [2021-06-05 15:11:01,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:11:01,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:01,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:11:01,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:11:01,045 INFO L87 Difference]: Start difference. First operand 9638 states and 43341 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:02,536 INFO L93 Difference]: Finished difference Result 10474 states and 46532 transitions. [2021-06-05 15:11:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:11:02,536 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:02,559 INFO L225 Difference]: With dead ends: 10474 [2021-06-05 15:11:02,560 INFO L226 Difference]: Without dead ends: 10447 [2021-06-05 15:11:02,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1191.6ms TimeCoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:11:02,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10447 states. [2021-06-05 15:11:02,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10447 to 9614. [2021-06-05 15:11:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9614 states, 9613 states have (on average 4.5019244772703635) internal successors, (43277), 9613 states have internal predecessors, (43277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9614 states to 9614 states and 43277 transitions. [2021-06-05 15:11:02,717 INFO L78 Accepts]: Start accepts. Automaton has 9614 states and 43277 transitions. Word has length 33 [2021-06-05 15:11:02,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:02,717 INFO L482 AbstractCegarLoop]: Abstraction has 9614 states and 43277 transitions. [2021-06-05 15:11:02,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand 9614 states and 43277 transitions. [2021-06-05 15:11:02,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:02,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:02,733 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, 1, 1, 1] [2021-06-05 15:11:02,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:02,934 INFO L430 AbstractCegarLoop]: === Iteration 262 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:02,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:02,934 INFO L82 PathProgramCache]: Analyzing trace with hash 706593546, now seen corresponding path program 181 times [2021-06-05 15:11:02,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:02,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966997860] [2021-06-05 15:11:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:03,110 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 15:11:03,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:03,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966997860] [2021-06-05 15:11:03,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966997860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:03,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569098752] [2021-06-05 15:11:03,111 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 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 15:11:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:03,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:03,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:03,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:03,272 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 29 treesize of output 13 [2021-06-05 15:11:03,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:03,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:03,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:03,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:11:03,365 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 15:11:03,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569098752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:03,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:03,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:11:03,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636435311] [2021-06-05 15:11:03,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:03,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:03,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:03,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:03,366 INFO L87 Difference]: Start difference. First operand 9614 states and 43277 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:04,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:04,963 INFO L93 Difference]: Finished difference Result 10797 states and 47783 transitions. [2021-06-05 15:11:04,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:11:04,964 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:04,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:04,988 INFO L225 Difference]: With dead ends: 10797 [2021-06-05 15:11:04,989 INFO L226 Difference]: Without dead ends: 10755 [2021-06-05 15:11:04,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1242.5ms TimeCoverageRelationStatistics Valid=393, Invalid=2057, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:11:05,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10755 states. [2021-06-05 15:11:05,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10755 to 9605. [2021-06-05 15:11:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9605 states, 9604 states have (on average 4.502082465639317) internal successors, (43238), 9604 states have internal predecessors, (43238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:05,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9605 states to 9605 states and 43238 transitions. [2021-06-05 15:11:05,157 INFO L78 Accepts]: Start accepts. Automaton has 9605 states and 43238 transitions. Word has length 33 [2021-06-05 15:11:05,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:05,157 INFO L482 AbstractCegarLoop]: Abstraction has 9605 states and 43238 transitions. [2021-06-05 15:11:05,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:05,158 INFO L276 IsEmpty]: Start isEmpty. Operand 9605 states and 43238 transitions. [2021-06-05 15:11:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:05,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:05,173 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, 1, 1, 1] [2021-06-05 15:11:05,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 15:11:05,374 INFO L430 AbstractCegarLoop]: === Iteration 263 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:05,374 INFO L82 PathProgramCache]: Analyzing trace with hash 798176900, now seen corresponding path program 182 times [2021-06-05 15:11:05,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:05,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199765517] [2021-06-05 15:11:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:05,549 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 15:11:05,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:05,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199765517] [2021-06-05 15:11:05,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199765517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:05,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441920144] [2021-06-05 15:11:05,550 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 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 15:11:05,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:05,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:05,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:05,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:05,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:05,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:05,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:05,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:05,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:05,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:11:05,924 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 15:11:05,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441920144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:05,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:05,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:11:05,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054900519] [2021-06-05 15:11:05,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:11:05,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:05,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:11:05,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:11:05,925 INFO L87 Difference]: Start difference. First operand 9605 states and 43238 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:07,932 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2021-06-05 15:11:07,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:07,942 INFO L93 Difference]: Finished difference Result 10542 states and 46915 transitions. [2021-06-05 15:11:07,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:11:07,942 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:07,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:07,967 INFO L225 Difference]: With dead ends: 10542 [2021-06-05 15:11:07,967 INFO L226 Difference]: Without dead ends: 10511 [2021-06-05 15:11:07,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1834.3ms TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:11:07,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10511 states. [2021-06-05 15:11:08,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10511 to 9633. [2021-06-05 15:11:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9633 states, 9632 states have (on average 4.505606312292358) internal successors, (43398), 9632 states have internal predecessors, (43398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:08,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9633 states to 9633 states and 43398 transitions. [2021-06-05 15:11:08,132 INFO L78 Accepts]: Start accepts. Automaton has 9633 states and 43398 transitions. Word has length 33 [2021-06-05 15:11:08,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:08,132 INFO L482 AbstractCegarLoop]: Abstraction has 9633 states and 43398 transitions. [2021-06-05 15:11:08,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:08,132 INFO L276 IsEmpty]: Start isEmpty. Operand 9633 states and 43398 transitions. [2021-06-05 15:11:08,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:08,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:08,148 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, 1, 1, 1] [2021-06-05 15:11:08,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 15:11:08,349 INFO L430 AbstractCegarLoop]: === Iteration 264 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:08,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2101449506, now seen corresponding path program 183 times [2021-06-05 15:11:08,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:08,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847533980] [2021-06-05 15:11:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:08,508 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 15:11:08,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:08,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847533980] [2021-06-05 15:11:08,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847533980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:08,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012475026] [2021-06-05 15:11:08,509 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 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 15:11:08,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:11:08,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:08,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:08,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:08,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:08,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 15:11:08,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:08,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:08,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:08,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 15:11:08,873 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 15:11:08,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012475026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:08,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:08,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:11:08,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382272348] [2021-06-05 15:11:08,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:11:08,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:08,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:11:08,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:11:08,874 INFO L87 Difference]: Start difference. First operand 9633 states and 43398 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:10,736 INFO L93 Difference]: Finished difference Result 10287 states and 45907 transitions. [2021-06-05 15:11:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:11:10,737 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:10,760 INFO L225 Difference]: With dead ends: 10287 [2021-06-05 15:11:10,761 INFO L226 Difference]: Without dead ends: 10270 [2021-06-05 15:11:10,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1551.4ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:11:10,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10270 states. [2021-06-05 15:11:10,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10270 to 9675. [2021-06-05 15:11:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9675 states, 9674 states have (on average 4.500310109572049) internal successors, (43536), 9674 states have internal predecessors, (43536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:10,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9675 states to 9675 states and 43536 transitions. [2021-06-05 15:11:10,923 INFO L78 Accepts]: Start accepts. Automaton has 9675 states and 43536 transitions. Word has length 33 [2021-06-05 15:11:10,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:10,923 INFO L482 AbstractCegarLoop]: Abstraction has 9675 states and 43536 transitions. [2021-06-05 15:11:10,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:10,923 INFO L276 IsEmpty]: Start isEmpty. Operand 9675 states and 43536 transitions. [2021-06-05 15:11:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:10,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:10,939 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, 1, 1, 1] [2021-06-05 15:11:11,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:11,139 INFO L430 AbstractCegarLoop]: === Iteration 265 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:11,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1202087434, now seen corresponding path program 184 times [2021-06-05 15:11:11,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:11,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910994664] [2021-06-05 15:11:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:11,391 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 15:11:11,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:11,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910994664] [2021-06-05 15:11:11,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910994664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:11,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424837604] [2021-06-05 15:11:11,392 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 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 15:11:11,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:11,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:11,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:11,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:11,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:11,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 15:11:11,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:11,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:11,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:11,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:11:11,639 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 15:11:11,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424837604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:11,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:11,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:11:11,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489995792] [2021-06-05 15:11:11,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:11:11,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:11,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:11:11,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:11:11,640 INFO L87 Difference]: Start difference. First operand 9675 states and 43536 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:11,766 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-06-05 15:11:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:14,694 INFO L93 Difference]: Finished difference Result 11460 states and 50511 transitions. [2021-06-05 15:11:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 15:11:14,695 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:14,721 INFO L225 Difference]: With dead ends: 11460 [2021-06-05 15:11:14,721 INFO L226 Difference]: Without dead ends: 11414 [2021-06-05 15:11:14,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 2746.8ms TimeCoverageRelationStatistics Valid=746, Invalid=3946, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:11:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11414 states. [2021-06-05 15:11:14,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11414 to 9772. [2021-06-05 15:11:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9772 states, 9771 states have (on average 4.503019138266298) internal successors, (43999), 9771 states have internal predecessors, (43999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 43999 transitions. [2021-06-05 15:11:14,905 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 43999 transitions. Word has length 33 [2021-06-05 15:11:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:14,905 INFO L482 AbstractCegarLoop]: Abstraction has 9772 states and 43999 transitions. [2021-06-05 15:11:14,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 43999 transitions. [2021-06-05 15:11:14,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:14,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:14,921 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, 1, 1, 1] [2021-06-05 15:11:15,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:15,121 INFO L430 AbstractCegarLoop]: === Iteration 266 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:15,122 INFO L82 PathProgramCache]: Analyzing trace with hash 2048062986, now seen corresponding path program 185 times [2021-06-05 15:11:15,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:15,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22615174] [2021-06-05 15:11:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:15,367 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 15:11:15,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:15,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22615174] [2021-06-05 15:11:15,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22615174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:15,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969271867] [2021-06-05 15:11:15,367 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 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 15:11:15,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:11:15,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:15,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:15,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:15,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:15,517 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 29 treesize of output 13 [2021-06-05 15:11:15,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:15,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:15,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:15,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:11:15,605 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 15:11:15,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969271867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:15,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:15,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:11:15,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437102748] [2021-06-05 15:11:15,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:15,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:15,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:15,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:15,606 INFO L87 Difference]: Start difference. First operand 9772 states and 43999 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:11:18,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:18,090 INFO L93 Difference]: Finished difference Result 11677 states and 50688 transitions. [2021-06-05 15:11:18,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:11:18,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:11:18,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:18,116 INFO L225 Difference]: With dead ends: 11677 [2021-06-05 15:11:18,117 INFO L226 Difference]: Without dead ends: 11616 [2021-06-05 15:11:18,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 2216.2ms TimeCoverageRelationStatistics Valid=641, Invalid=2781, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:11:18,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11616 states. [2021-06-05 15:11:18,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11616 to 9707. [2021-06-05 15:11:18,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9707 states, 9706 states have (on average 4.5029878425716054) internal successors, (43706), 9706 states have internal predecessors, (43706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9707 states to 9707 states and 43706 transitions. [2021-06-05 15:11:18,302 INFO L78 Accepts]: Start accepts. Automaton has 9707 states and 43706 transitions. Word has length 33 [2021-06-05 15:11:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:18,302 INFO L482 AbstractCegarLoop]: Abstraction has 9707 states and 43706 transitions. [2021-06-05 15:11:18,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:11:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 9707 states and 43706 transitions. [2021-06-05 15:11:18,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:18,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:18,318 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, 1, 1, 1] [2021-06-05 15:11:18,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-06-05 15:11:18,519 INFO L430 AbstractCegarLoop]: === Iteration 267 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:18,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:18,519 INFO L82 PathProgramCache]: Analyzing trace with hash -184075214, now seen corresponding path program 186 times [2021-06-05 15:11:18,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:18,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017346477] [2021-06-05 15:11:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:18,753 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 15:11:18,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:18,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017346477] [2021-06-05 15:11:18,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017346477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:18,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464127293] [2021-06-05 15:11:18,754 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 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 15:11:18,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:11:18,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:18,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:18,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:18,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:18,952 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:11:18,952 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 29 treesize of output 57 [2021-06-05 15:11:18,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:18,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:18,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:18,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 15:11:19,167 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 15:11:19,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464127293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:19,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:19,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:11:19,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316826915] [2021-06-05 15:11:19,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:11:19,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:19,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:11:19,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:11:19,168 INFO L87 Difference]: Start difference. First operand 9707 states and 43706 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:21,203 INFO L93 Difference]: Finished difference Result 10786 states and 47327 transitions. [2021-06-05 15:11:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:11:21,203 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:21,228 INFO L225 Difference]: With dead ends: 10786 [2021-06-05 15:11:21,229 INFO L226 Difference]: Without dead ends: 10716 [2021-06-05 15:11:21,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1822.7ms TimeCoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:11:21,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10716 states. [2021-06-05 15:11:21,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10716 to 9692. [2021-06-05 15:11:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9692 states, 9691 states have (on average 4.504901454958208) internal successors, (43657), 9691 states have internal predecessors, (43657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9692 states to 9692 states and 43657 transitions. [2021-06-05 15:11:21,402 INFO L78 Accepts]: Start accepts. Automaton has 9692 states and 43657 transitions. Word has length 33 [2021-06-05 15:11:21,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:21,402 INFO L482 AbstractCegarLoop]: Abstraction has 9692 states and 43657 transitions. [2021-06-05 15:11:21,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:21,402 INFO L276 IsEmpty]: Start isEmpty. Operand 9692 states and 43657 transitions. [2021-06-05 15:11:21,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:21,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:21,418 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, 1, 1, 1] [2021-06-05 15:11:21,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:21,618 INFO L430 AbstractCegarLoop]: === Iteration 268 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1232847616, now seen corresponding path program 187 times [2021-06-05 15:11:21,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:21,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428127483] [2021-06-05 15:11:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:21,800 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 15:11:21,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:21,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428127483] [2021-06-05 15:11:21,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428127483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:21,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315376416] [2021-06-05 15:11:21,800 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 15:11:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:21,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:21,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:21,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:21,956 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 29 treesize of output 13 [2021-06-05 15:11:21,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:21,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:21,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:21,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:11:22,045 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 15:11:22,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315376416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:22,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:22,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:11:22,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295759348] [2021-06-05 15:11:22,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:22,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:22,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:22,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:22,046 INFO L87 Difference]: Start difference. First operand 9692 states and 43657 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:23,411 INFO L93 Difference]: Finished difference Result 10895 states and 48173 transitions. [2021-06-05 15:11:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:11:23,412 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:23,439 INFO L225 Difference]: With dead ends: 10895 [2021-06-05 15:11:23,439 INFO L226 Difference]: Without dead ends: 10793 [2021-06-05 15:11:23,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1221.4ms TimeCoverageRelationStatistics Valid=469, Invalid=2183, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:11:23,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10793 states. [2021-06-05 15:11:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10793 to 9703. [2021-06-05 15:11:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9703 states, 9702 states have (on average 4.510822510822511) internal successors, (43764), 9702 states have internal predecessors, (43764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9703 states to 9703 states and 43764 transitions. [2021-06-05 15:11:23,620 INFO L78 Accepts]: Start accepts. Automaton has 9703 states and 43764 transitions. Word has length 33 [2021-06-05 15:11:23,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:23,620 INFO L482 AbstractCegarLoop]: Abstraction has 9703 states and 43764 transitions. [2021-06-05 15:11:23,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:23,620 INFO L276 IsEmpty]: Start isEmpty. Operand 9703 states and 43764 transitions. [2021-06-05 15:11:23,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:23,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:23,639 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, 1, 1, 1] [2021-06-05 15:11:23,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 15:11:23,840 INFO L430 AbstractCegarLoop]: === Iteration 269 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:23,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:23,840 INFO L82 PathProgramCache]: Analyzing trace with hash -713615296, now seen corresponding path program 188 times [2021-06-05 15:11:23,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:23,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381998843] [2021-06-05 15:11:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:24,026 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 15:11:24,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:24,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381998843] [2021-06-05 15:11:24,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381998843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:24,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723990616] [2021-06-05 15:11:24,026 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 15:11:24,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:24,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:24,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:24,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:24,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:24,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:24,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:24,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:24,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:24,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:11:24,503 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 15:11:24,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723990616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:24,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:24,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:11:24,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890367107] [2021-06-05 15:11:24,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:11:24,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:24,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:11:24,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:11:24,504 INFO L87 Difference]: Start difference. First operand 9703 states and 43764 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:26,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:26,026 INFO L93 Difference]: Finished difference Result 10558 states and 47249 transitions. [2021-06-05 15:11:26,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:11:26,026 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:26,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:26,050 INFO L225 Difference]: With dead ends: 10558 [2021-06-05 15:11:26,050 INFO L226 Difference]: Without dead ends: 10518 [2021-06-05 15:11:26,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1404.1ms TimeCoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:11:26,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10518 states. [2021-06-05 15:11:26,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10518 to 9706. [2021-06-05 15:11:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9706 states, 9705 states have (on average 4.510046367851623) internal successors, (43770), 9705 states have internal predecessors, (43770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:26,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 43770 transitions. [2021-06-05 15:11:26,218 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 43770 transitions. Word has length 33 [2021-06-05 15:11:26,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:26,219 INFO L482 AbstractCegarLoop]: Abstraction has 9706 states and 43770 transitions. [2021-06-05 15:11:26,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:26,219 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 43770 transitions. [2021-06-05 15:11:26,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:26,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:26,235 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, 1, 1, 1] [2021-06-05 15:11:26,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:26,436 INFO L430 AbstractCegarLoop]: === Iteration 270 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:26,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:26,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1648437726, now seen corresponding path program 189 times [2021-06-05 15:11:26,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:26,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606234887] [2021-06-05 15:11:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:26,595 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 15:11:26,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:26,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606234887] [2021-06-05 15:11:26,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606234887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:26,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438573857] [2021-06-05 15:11:26,596 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 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 15:11:26,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:11:26,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:26,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:26,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:26,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:26,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 15:11:26,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:26,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:26,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:26,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 15:11:26,978 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 15:11:26,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438573857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:26,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:26,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:11:26,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36538849] [2021-06-05 15:11:26,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:11:26,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:26,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:11:26,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:11:26,979 INFO L87 Difference]: Start difference. First operand 9706 states and 43770 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:27,991 INFO L93 Difference]: Finished difference Result 10156 states and 45555 transitions. [2021-06-05 15:11:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:11:27,991 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:28,014 INFO L225 Difference]: With dead ends: 10156 [2021-06-05 15:11:28,014 INFO L226 Difference]: Without dead ends: 10127 [2021-06-05 15:11:28,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1003.7ms TimeCoverageRelationStatistics Valid=276, Invalid=1284, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:11:28,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10127 states. [2021-06-05 15:11:28,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10127 to 9691. [2021-06-05 15:11:28,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9691 states, 9690 states have (on average 4.511971104231166) internal successors, (43721), 9690 states have internal predecessors, (43721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:28,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9691 states to 9691 states and 43721 transitions. [2021-06-05 15:11:28,257 INFO L78 Accepts]: Start accepts. Automaton has 9691 states and 43721 transitions. Word has length 33 [2021-06-05 15:11:28,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:28,257 INFO L482 AbstractCegarLoop]: Abstraction has 9691 states and 43721 transitions. [2021-06-05 15:11:28,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:28,257 INFO L276 IsEmpty]: Start isEmpty. Operand 9691 states and 43721 transitions. [2021-06-05 15:11:28,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:28,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:28,273 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, 1, 1, 1] [2021-06-05 15:11:28,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 15:11:28,473 INFO L430 AbstractCegarLoop]: === Iteration 271 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:28,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:28,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1789761482, now seen corresponding path program 190 times [2021-06-05 15:11:28,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:28,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942166121] [2021-06-05 15:11:28,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:28,655 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 15:11:28,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:28,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942166121] [2021-06-05 15:11:28,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942166121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:28,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265523890] [2021-06-05 15:11:28,655 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 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 15:11:28,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:28,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:28,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:28,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:28,877 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 15:11:28,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:28,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:28,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:28,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:11:28,970 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 15:11:28,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265523890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:28,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:28,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:11:28,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276880260] [2021-06-05 15:11:28,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:28,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:28,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:28,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:28,971 INFO L87 Difference]: Start difference. First operand 9691 states and 43721 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:30,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:30,219 INFO L93 Difference]: Finished difference Result 11007 states and 48616 transitions. [2021-06-05 15:11:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:11:30,220 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:30,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:30,244 INFO L225 Difference]: With dead ends: 11007 [2021-06-05 15:11:30,245 INFO L226 Difference]: Without dead ends: 10967 [2021-06-05 15:11:30,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 881.5ms TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:11:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10967 states. [2021-06-05 15:11:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10967 to 9764. [2021-06-05 15:11:30,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9764 states, 9763 states have (on average 4.5145959233842055) internal successors, (44076), 9763 states have internal predecessors, (44076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9764 states to 9764 states and 44076 transitions. [2021-06-05 15:11:30,430 INFO L78 Accepts]: Start accepts. Automaton has 9764 states and 44076 transitions. Word has length 33 [2021-06-05 15:11:30,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:30,430 INFO L482 AbstractCegarLoop]: Abstraction has 9764 states and 44076 transitions. [2021-06-05 15:11:30,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:30,430 INFO L276 IsEmpty]: Start isEmpty. Operand 9764 states and 44076 transitions. [2021-06-05 15:11:30,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:30,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:30,446 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, 1, 1, 1] [2021-06-05 15:11:30,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:30,646 INFO L430 AbstractCegarLoop]: === Iteration 272 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:30,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1843148002, now seen corresponding path program 191 times [2021-06-05 15:11:30,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:30,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843427919] [2021-06-05 15:11:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:30,874 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 15:11:30,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:30,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843427919] [2021-06-05 15:11:30,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843427919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:30,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217298297] [2021-06-05 15:11:30,875 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 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 15:11:30,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:11:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:30,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:31,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:31,042 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 28 treesize of output 12 [2021-06-05 15:11:31,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:31,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:31,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:31,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:11:31,113 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 15:11:31,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217298297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:31,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:31,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:11:31,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828154921] [2021-06-05 15:11:31,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:31,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:31,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:31,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:31,114 INFO L87 Difference]: Start difference. First operand 9764 states and 44076 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:11:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:34,115 INFO L93 Difference]: Finished difference Result 12376 states and 53228 transitions. [2021-06-05 15:11:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:11:34,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:11:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:34,145 INFO L225 Difference]: With dead ends: 12376 [2021-06-05 15:11:34,145 INFO L226 Difference]: Without dead ends: 12247 [2021-06-05 15:11:34,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 2578.2ms TimeCoverageRelationStatistics Valid=635, Invalid=3271, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:11:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12247 states. [2021-06-05 15:11:34,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12247 to 9736. [2021-06-05 15:11:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9736 states, 9735 states have (on average 4.514021571648691) internal successors, (43944), 9735 states have internal predecessors, (43944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:34,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9736 states to 9736 states and 43944 transitions. [2021-06-05 15:11:34,339 INFO L78 Accepts]: Start accepts. Automaton has 9736 states and 43944 transitions. Word has length 33 [2021-06-05 15:11:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:34,339 INFO L482 AbstractCegarLoop]: Abstraction has 9736 states and 43944 transitions. [2021-06-05 15:11:34,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:11:34,339 INFO L276 IsEmpty]: Start isEmpty. Operand 9736 states and 43944 transitions. [2021-06-05 15:11:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:34,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:34,355 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, 1, 1, 1] [2021-06-05 15:11:34,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:34,555 INFO L430 AbstractCegarLoop]: === Iteration 273 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:34,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:34,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1477248958, now seen corresponding path program 192 times [2021-06-05 15:11:34,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:34,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723976314] [2021-06-05 15:11:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:34,727 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 15:11:34,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:34,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723976314] [2021-06-05 15:11:34,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723976314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:34,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165200598] [2021-06-05 15:11:34,727 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 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 15:11:34,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:11:34,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:34,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:34,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:34,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:35,022 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:11:35,022 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 61 [2021-06-05 15:11:35,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:11:35,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:35,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:35,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-06-05 15:11:35,116 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 15:11:35,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165200598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:35,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:35,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:11:35,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782007383] [2021-06-05 15:11:35,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:11:35,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:35,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:11:35,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:11:35,117 INFO L87 Difference]: Start difference. First operand 9736 states and 43944 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:36,589 INFO L93 Difference]: Finished difference Result 10492 states and 46870 transitions. [2021-06-05 15:11:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:11:36,590 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:36,614 INFO L225 Difference]: With dead ends: 10492 [2021-06-05 15:11:36,614 INFO L226 Difference]: Without dead ends: 10446 [2021-06-05 15:11:36,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1154.1ms TimeCoverageRelationStatistics Valid=210, Invalid=2046, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:11:36,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10446 states. [2021-06-05 15:11:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10446 to 9736. [2021-06-05 15:11:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9736 states, 9735 states have (on average 4.513816127375449) internal successors, (43942), 9735 states have internal predecessors, (43942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:36,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9736 states to 9736 states and 43942 transitions. [2021-06-05 15:11:36,838 INFO L78 Accepts]: Start accepts. Automaton has 9736 states and 43942 transitions. Word has length 33 [2021-06-05 15:11:36,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:36,838 INFO L482 AbstractCegarLoop]: Abstraction has 9736 states and 43942 transitions. [2021-06-05 15:11:36,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:36,838 INFO L276 IsEmpty]: Start isEmpty. Operand 9736 states and 43942 transitions. [2021-06-05 15:11:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:36,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:36,854 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, 1, 1, 1] [2021-06-05 15:11:37,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:37,055 INFO L430 AbstractCegarLoop]: === Iteration 274 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:37,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:37,055 INFO L82 PathProgramCache]: Analyzing trace with hash -105794736, now seen corresponding path program 193 times [2021-06-05 15:11:37,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:37,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548304886] [2021-06-05 15:11:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:37,248 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 15:11:37,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:37,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548304886] [2021-06-05 15:11:37,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548304886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:37,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361362221] [2021-06-05 15:11:37,248 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 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 15:11:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:37,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:37,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:37,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:37,456 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 28 treesize of output 12 [2021-06-05 15:11:37,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:37,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:37,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:37,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:11:37,530 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 15:11:37,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361362221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:37,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:37,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:11:37,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451834018] [2021-06-05 15:11:37,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:37,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:37,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:37,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:37,531 INFO L87 Difference]: Start difference. First operand 9736 states and 43942 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:39,039 INFO L93 Difference]: Finished difference Result 10873 states and 48466 transitions. [2021-06-05 15:11:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:11:39,040 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:39,065 INFO L225 Difference]: With dead ends: 10873 [2021-06-05 15:11:39,066 INFO L226 Difference]: Without dead ends: 10782 [2021-06-05 15:11:39,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1226.1ms TimeCoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:11:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10782 states. [2021-06-05 15:11:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10782 to 9721. [2021-06-05 15:11:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9721 states, 9720 states have (on average 4.515432098765432) internal successors, (43890), 9720 states have internal predecessors, (43890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9721 states to 9721 states and 43890 transitions. [2021-06-05 15:11:39,236 INFO L78 Accepts]: Start accepts. Automaton has 9721 states and 43890 transitions. Word has length 33 [2021-06-05 15:11:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:39,236 INFO L482 AbstractCegarLoop]: Abstraction has 9721 states and 43890 transitions. [2021-06-05 15:11:39,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:39,236 INFO L276 IsEmpty]: Start isEmpty. Operand 9721 states and 43890 transitions. [2021-06-05 15:11:39,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:39,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:39,252 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, 1, 1, 1] [2021-06-05 15:11:39,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 15:11:39,453 INFO L430 AbstractCegarLoop]: === Iteration 275 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:39,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1005922848, now seen corresponding path program 194 times [2021-06-05 15:11:39,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:39,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031131583] [2021-06-05 15:11:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:39,628 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 15:11:39,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:39,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031131583] [2021-06-05 15:11:39,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031131583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:39,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014310668] [2021-06-05 15:11:39,629 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 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 15:11:39,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:39,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:39,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:39,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:39,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:39,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:39,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:39,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:39,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:39,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:11:40,012 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 15:11:40,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014310668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:40,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:40,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:11:40,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105927799] [2021-06-05 15:11:40,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:11:40,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:40,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:11:40,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:11:40,013 INFO L87 Difference]: Start difference. First operand 9721 states and 43890 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:40,144 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-05 15:11:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:42,076 INFO L93 Difference]: Finished difference Result 10514 states and 46949 transitions. [2021-06-05 15:11:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:11:42,076 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:42,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:42,101 INFO L225 Difference]: With dead ends: 10514 [2021-06-05 15:11:42,101 INFO L226 Difference]: Without dead ends: 10483 [2021-06-05 15:11:42,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1803.2ms TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:11:42,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10483 states. [2021-06-05 15:11:42,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10483 to 9725. [2021-06-05 15:11:42,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9725 states, 9724 states have (on average 4.514294529000411) internal successors, (43897), 9724 states have internal predecessors, (43897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9725 states to 9725 states and 43897 transitions. [2021-06-05 15:11:42,266 INFO L78 Accepts]: Start accepts. Automaton has 9725 states and 43897 transitions. Word has length 33 [2021-06-05 15:11:42,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:42,266 INFO L482 AbstractCegarLoop]: Abstraction has 9725 states and 43897 transitions. [2021-06-05 15:11:42,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 9725 states and 43897 transitions. [2021-06-05 15:11:42,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:42,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:42,282 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, 1, 1, 1] [2021-06-05 15:11:42,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 15:11:42,483 INFO L430 AbstractCegarLoop]: === Iteration 276 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:42,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:42,483 INFO L82 PathProgramCache]: Analyzing trace with hash 297349758, now seen corresponding path program 195 times [2021-06-05 15:11:42,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:42,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264340965] [2021-06-05 15:11:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:42,656 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 15:11:42,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:42,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264340965] [2021-06-05 15:11:42,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264340965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:42,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55270161] [2021-06-05 15:11:42,656 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 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 15:11:42,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:11:42,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:42,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:42,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:42,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:42,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 15:11:42,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:42,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:42,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:42,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:38 [2021-06-05 15:11:43,025 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 15:11:43,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55270161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:43,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:43,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:11:43,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142744241] [2021-06-05 15:11:43,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:11:43,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:43,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:11:43,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:11:43,026 INFO L87 Difference]: Start difference. First operand 9725 states and 43897 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:44,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:44,710 INFO L93 Difference]: Finished difference Result 10399 states and 46455 transitions. [2021-06-05 15:11:44,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:11:44,710 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:44,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:44,734 INFO L225 Difference]: With dead ends: 10399 [2021-06-05 15:11:44,735 INFO L226 Difference]: Without dead ends: 10390 [2021-06-05 15:11:44,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1574.9ms TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:11:44,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10390 states. [2021-06-05 15:11:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10390 to 9734. [2021-06-05 15:11:44,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9734 states, 9733 states have (on average 4.513202506935169) internal successors, (43927), 9733 states have internal predecessors, (43927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9734 states to 9734 states and 43927 transitions. [2021-06-05 15:11:44,961 INFO L78 Accepts]: Start accepts. Automaton has 9734 states and 43927 transitions. Word has length 33 [2021-06-05 15:11:44,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:44,961 INFO L482 AbstractCegarLoop]: Abstraction has 9734 states and 43927 transitions. [2021-06-05 15:11:44,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 9734 states and 43927 transitions. [2021-06-05 15:11:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:44,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:44,978 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, 1, 1, 1] [2021-06-05 15:11:45,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:45,178 INFO L430 AbstractCegarLoop]: === Iteration 277 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:45,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:45,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1371043684, now seen corresponding path program 196 times [2021-06-05 15:11:45,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:45,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809871063] [2021-06-05 15:11:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:45,351 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 15:11:45,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:45,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809871063] [2021-06-05 15:11:45,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809871063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:45,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058306934] [2021-06-05 15:11:45,352 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 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 15:11:45,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:45,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:45,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:45,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:45,502 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 15:11:45,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:45,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:45,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:45,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 15:11:45,590 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 15:11:45,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058306934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:45,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:45,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:11:45,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760755019] [2021-06-05 15:11:45,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:45,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:45,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:45,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:45,591 INFO L87 Difference]: Start difference. First operand 9734 states and 43927 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:11:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:46,927 INFO L93 Difference]: Finished difference Result 10779 states and 47882 transitions. [2021-06-05 15:11:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:11:46,927 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:11:46,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:46,952 INFO L225 Difference]: With dead ends: 10779 [2021-06-05 15:11:46,953 INFO L226 Difference]: Without dead ends: 10751 [2021-06-05 15:11:46,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1094.8ms TimeCoverageRelationStatistics Valid=388, Invalid=1964, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:11:46,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10751 states. [2021-06-05 15:11:47,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10751 to 9782. [2021-06-05 15:11:47,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9782 states, 9781 states have (on average 4.516511604130457) internal successors, (44176), 9781 states have internal predecessors, (44176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9782 states to 9782 states and 44176 transitions. [2021-06-05 15:11:47,132 INFO L78 Accepts]: Start accepts. Automaton has 9782 states and 44176 transitions. Word has length 33 [2021-06-05 15:11:47,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:47,132 INFO L482 AbstractCegarLoop]: Abstraction has 9782 states and 44176 transitions. [2021-06-05 15:11:47,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:11:47,132 INFO L276 IsEmpty]: Start isEmpty. Operand 9782 states and 44176 transitions. [2021-06-05 15:11:47,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:47,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:47,148 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, 1, 1, 1] [2021-06-05 15:11:47,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:47,348 INFO L430 AbstractCegarLoop]: === Iteration 278 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:47,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:47,349 INFO L82 PathProgramCache]: Analyzing trace with hash -602012314, now seen corresponding path program 197 times [2021-06-05 15:11:47,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:47,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686296833] [2021-06-05 15:11:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:47,599 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 15:11:47,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:47,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686296833] [2021-06-05 15:11:47,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686296833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:47,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815930574] [2021-06-05 15:11:47,600 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 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 15:11:47,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:11:47,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:47,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:47,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:47,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:47,759 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 29 treesize of output 13 [2021-06-05 15:11:47,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:47,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:47,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:47,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:11:47,856 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 15:11:47,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815930574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:47,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:47,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:11:47,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657221371] [2021-06-05 15:11:47,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:11:47,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:47,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:11:47,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:11:47,857 INFO L87 Difference]: Start difference. First operand 9782 states and 44176 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:49,005 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 15:11:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:51,319 INFO L93 Difference]: Finished difference Result 11274 states and 49885 transitions. [2021-06-05 15:11:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 15:11:51,319 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:51,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:51,344 INFO L225 Difference]: With dead ends: 11274 [2021-06-05 15:11:51,344 INFO L226 Difference]: Without dead ends: 11166 [2021-06-05 15:11:51,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2989.7ms TimeCoverageRelationStatistics Valid=758, Invalid=4792, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:11:51,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11166 states. [2021-06-05 15:11:51,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11166 to 9777. [2021-06-05 15:11:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9777 states, 9776 states have (on average 4.514934533551555) internal successors, (44138), 9776 states have internal predecessors, (44138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9777 states to 9777 states and 44138 transitions. [2021-06-05 15:11:51,518 INFO L78 Accepts]: Start accepts. Automaton has 9777 states and 44138 transitions. Word has length 33 [2021-06-05 15:11:51,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:51,518 INFO L482 AbstractCegarLoop]: Abstraction has 9777 states and 44138 transitions. [2021-06-05 15:11:51,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:51,519 INFO L276 IsEmpty]: Start isEmpty. Operand 9777 states and 44138 transitions. [2021-06-05 15:11:51,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:51,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:51,535 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, 1, 1, 1] [2021-06-05 15:11:51,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-06-05 15:11:51,736 INFO L430 AbstractCegarLoop]: === Iteration 279 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:51,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1988174962, now seen corresponding path program 198 times [2021-06-05 15:11:51,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:51,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123970204] [2021-06-05 15:11:51,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:51,962 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 15:11:51,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:51,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123970204] [2021-06-05 15:11:51,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123970204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:51,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719198084] [2021-06-05 15:11:51,963 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 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 15:11:51,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:11:51,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:52,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:52,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:52,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:52,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:52,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:52,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:52,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:52,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:11:52,338 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 15:11:52,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719198084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:52,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:52,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:11:52,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133866935] [2021-06-05 15:11:52,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:11:52,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:52,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:11:52,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:11:52,339 INFO L87 Difference]: Start difference. First operand 9777 states and 44138 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:54,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:54,896 INFO L93 Difference]: Finished difference Result 11063 states and 48490 transitions. [2021-06-05 15:11:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:11:54,897 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:54,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:54,924 INFO L225 Difference]: With dead ends: 11063 [2021-06-05 15:11:54,924 INFO L226 Difference]: Without dead ends: 11022 [2021-06-05 15:11:54,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 2114.1ms TimeCoverageRelationStatistics Valid=333, Invalid=2859, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:11:54,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11022 states. [2021-06-05 15:11:55,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11022 to 9762. [2021-06-05 15:11:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9762 states, 9761 states have (on average 4.516852781477308) internal successors, (44089), 9761 states have internal predecessors, (44089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:55,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9762 states to 9762 states and 44089 transitions. [2021-06-05 15:11:55,104 INFO L78 Accepts]: Start accepts. Automaton has 9762 states and 44089 transitions. Word has length 33 [2021-06-05 15:11:55,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:55,104 INFO L482 AbstractCegarLoop]: Abstraction has 9762 states and 44089 transitions. [2021-06-05 15:11:55,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:55,104 INFO L276 IsEmpty]: Start isEmpty. Operand 9762 states and 44089 transitions. [2021-06-05 15:11:55,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:55,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:55,125 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, 1, 1, 1] [2021-06-05 15:11:55,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:55,333 INFO L430 AbstractCegarLoop]: === Iteration 280 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1258019932, now seen corresponding path program 199 times [2021-06-05 15:11:55,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:55,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900746847] [2021-06-05 15:11:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:55,505 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 15:11:55,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:55,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900746847] [2021-06-05 15:11:55,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900746847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:55,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914348272] [2021-06-05 15:11:55,506 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 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 15:11:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:55,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:55,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:55,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:55,662 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 29 treesize of output 13 [2021-06-05 15:11:55,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:55,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:55,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:55,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:11:55,750 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 15:11:55,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914348272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:55,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:55,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:11:55,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428061370] [2021-06-05 15:11:55,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:55,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:55,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:55,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:55,751 INFO L87 Difference]: Start difference. First operand 9762 states and 44089 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:57,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:57,470 INFO L93 Difference]: Finished difference Result 11137 states and 49368 transitions. [2021-06-05 15:11:57,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:11:57,470 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:57,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:57,496 INFO L225 Difference]: With dead ends: 11137 [2021-06-05 15:11:57,497 INFO L226 Difference]: Without dead ends: 11075 [2021-06-05 15:11:57,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1475.9ms TimeCoverageRelationStatistics Valid=509, Invalid=2683, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:11:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11075 states. [2021-06-05 15:11:57,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11075 to 9924. [2021-06-05 15:11:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9924 states, 9923 states have (on average 4.514058248513554) internal successors, (44793), 9923 states have internal predecessors, (44793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:57,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9924 states to 9924 states and 44793 transitions. [2021-06-05 15:11:57,724 INFO L78 Accepts]: Start accepts. Automaton has 9924 states and 44793 transitions. Word has length 33 [2021-06-05 15:11:57,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:57,724 INFO L482 AbstractCegarLoop]: Abstraction has 9924 states and 44793 transitions. [2021-06-05 15:11:57,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand 9924 states and 44793 transitions. [2021-06-05 15:11:57,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:11:57,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:57,740 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, 1, 1, 1] [2021-06-05 15:11:57,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:57,940 INFO L430 AbstractCegarLoop]: === Iteration 281 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:57,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:57,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1733674758, now seen corresponding path program 200 times [2021-06-05 15:11:57,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:57,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826899130] [2021-06-05 15:11:57,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:58,108 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 15:11:58,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:58,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826899130] [2021-06-05 15:11:58,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826899130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:58,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631285510] [2021-06-05 15:11:58,108 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 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 15:11:58,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:58,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:58,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:11:58,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:58,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:58,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:58,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:58,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:58,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:58,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:11:58,466 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 15:11:58,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631285510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:58,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:58,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:11:58,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16824693] [2021-06-05 15:11:58,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:11:58,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:58,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:11:58,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:11:58,467 INFO L87 Difference]: Start difference. First operand 9924 states and 44793 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:59,987 INFO L93 Difference]: Finished difference Result 10550 states and 47099 transitions. [2021-06-05 15:11:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:11:59,988 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:11:59,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:00,012 INFO L225 Difference]: With dead ends: 10550 [2021-06-05 15:12:00,012 INFO L226 Difference]: Without dead ends: 10533 [2021-06-05 15:12:00,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1272.3ms TimeCoverageRelationStatistics Valid=386, Invalid=1684, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:12:00,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10533 states. [2021-06-05 15:12:00,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10533 to 9924. [2021-06-05 15:12:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9924 states, 9923 states have (on average 4.513352816688501) internal successors, (44786), 9923 states have internal predecessors, (44786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9924 states to 9924 states and 44786 transitions. [2021-06-05 15:12:00,182 INFO L78 Accepts]: Start accepts. Automaton has 9924 states and 44786 transitions. Word has length 33 [2021-06-05 15:12:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:00,182 INFO L482 AbstractCegarLoop]: Abstraction has 9924 states and 44786 transitions. [2021-06-05 15:12:00,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:00,182 INFO L276 IsEmpty]: Start isEmpty. Operand 9924 states and 44786 transitions. [2021-06-05 15:12:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:00,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:00,198 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, 1, 1, 1] [2021-06-05 15:12:00,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable410,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:00,399 INFO L430 AbstractCegarLoop]: === Iteration 282 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:00,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:00,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1661930466, now seen corresponding path program 201 times [2021-06-05 15:12:00,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:00,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717968148] [2021-06-05 15:12:00,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:00,644 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 15:12:00,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:00,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717968148] [2021-06-05 15:12:00,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717968148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:00,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052920507] [2021-06-05 15:12:00,644 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 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 15:12:00,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:12:00,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:00,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:12:00,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:00,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:00,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:00,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:12:00,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:00,817 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 15:12:00,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:00,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:00,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:00,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:38 [2021-06-05 15:12:01,011 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 15:12:01,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052920507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:01,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:01,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:12:01,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336478486] [2021-06-05 15:12:01,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:12:01,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:01,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:12:01,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:12:01,012 INFO L87 Difference]: Start difference. First operand 9924 states and 44786 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:02,057 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-05 15:12:02,298 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 15:12:03,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:03,901 INFO L93 Difference]: Finished difference Result 10940 states and 48628 transitions. [2021-06-05 15:12:03,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:12:03,901 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:03,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:03,927 INFO L225 Difference]: With dead ends: 10940 [2021-06-05 15:12:03,927 INFO L226 Difference]: Without dead ends: 10894 [2021-06-05 15:12:03,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 2583.1ms TimeCoverageRelationStatistics Valid=541, Invalid=3119, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:12:03,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10894 states. [2021-06-05 15:12:04,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10894 to 9915. [2021-06-05 15:12:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9915 states, 9914 states have (on average 4.514424046802501) internal successors, (44756), 9914 states have internal predecessors, (44756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:04,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9915 states to 9915 states and 44756 transitions. [2021-06-05 15:12:04,096 INFO L78 Accepts]: Start accepts. Automaton has 9915 states and 44756 transitions. Word has length 33 [2021-06-05 15:12:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:04,096 INFO L482 AbstractCegarLoop]: Abstraction has 9915 states and 44756 transitions. [2021-06-05 15:12:04,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:04,096 INFO L276 IsEmpty]: Start isEmpty. Operand 9915 states and 44756 transitions. [2021-06-05 15:12:04,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:04,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:04,112 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, 1, 1, 1] [2021-06-05 15:12:04,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:04,313 INFO L430 AbstractCegarLoop]: === Iteration 283 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:04,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:04,313 INFO L82 PathProgramCache]: Analyzing trace with hash -118667836, now seen corresponding path program 202 times [2021-06-05 15:12:04,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:04,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891294231] [2021-06-05 15:12:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:04,575 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 15:12:04,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:04,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891294231] [2021-06-05 15:12:04,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891294231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:04,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479818429] [2021-06-05 15:12:04,576 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 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 15:12:04,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:04,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:04,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:04,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:04,764 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 15:12:04,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:04,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:04,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:04,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 15:12:04,863 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 15:12:04,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479818429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:04,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:04,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:12:04,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904283500] [2021-06-05 15:12:04,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:12:04,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:04,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:12:04,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:04,864 INFO L87 Difference]: Start difference. First operand 9915 states and 44756 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:07,135 INFO L93 Difference]: Finished difference Result 10942 states and 48596 transitions. [2021-06-05 15:12:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:12:07,135 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:07,161 INFO L225 Difference]: With dead ends: 10942 [2021-06-05 15:12:07,161 INFO L226 Difference]: Without dead ends: 10876 [2021-06-05 15:12:07,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1993.1ms TimeCoverageRelationStatistics Valid=591, Invalid=2949, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:12:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10876 states. [2021-06-05 15:12:07,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10876 to 9878. [2021-06-05 15:12:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9878 states, 9877 states have (on average 4.515541156221524) internal successors, (44600), 9877 states have internal predecessors, (44600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9878 states to 9878 states and 44600 transitions. [2021-06-05 15:12:07,341 INFO L78 Accepts]: Start accepts. Automaton has 9878 states and 44600 transitions. Word has length 33 [2021-06-05 15:12:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:07,341 INFO L482 AbstractCegarLoop]: Abstraction has 9878 states and 44600 transitions. [2021-06-05 15:12:07,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand 9878 states and 44600 transitions. [2021-06-05 15:12:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:07,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:07,357 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, 1, 1, 1] [2021-06-05 15:12:07,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 15:12:07,558 INFO L430 AbstractCegarLoop]: === Iteration 284 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:07,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1777252252, now seen corresponding path program 203 times [2021-06-05 15:12:07,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:07,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202870514] [2021-06-05 15:12:07,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:07,731 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 15:12:07,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:07,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202870514] [2021-06-05 15:12:07,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202870514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:07,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375523218] [2021-06-05 15:12:07,732 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 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 15:12:07,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:12:07,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:07,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:07,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:07,888 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 15:12:07,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:07,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:07,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:07,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-06-05 15:12:07,981 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 15:12:07,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375523218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:07,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:07,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:12:07,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131495079] [2021-06-05 15:12:07,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:07,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:07,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:07,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:07,982 INFO L87 Difference]: Start difference. First operand 9878 states and 44600 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:09,388 INFO L93 Difference]: Finished difference Result 10530 states and 47264 transitions. [2021-06-05 15:12:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:12:09,388 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:09,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:09,413 INFO L225 Difference]: With dead ends: 10530 [2021-06-05 15:12:09,413 INFO L226 Difference]: Without dead ends: 10478 [2021-06-05 15:12:09,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1288.3ms TimeCoverageRelationStatistics Valid=340, Invalid=1916, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:12:09,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10478 states. [2021-06-05 15:12:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10478 to 9863. [2021-06-05 15:12:09,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9863 states, 9862 states have (on average 4.517440681403366) internal successors, (44551), 9862 states have internal predecessors, (44551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:09,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9863 states to 9863 states and 44551 transitions. [2021-06-05 15:12:09,586 INFO L78 Accepts]: Start accepts. Automaton has 9863 states and 44551 transitions. Word has length 33 [2021-06-05 15:12:09,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:09,586 INFO L482 AbstractCegarLoop]: Abstraction has 9863 states and 44551 transitions. [2021-06-05 15:12:09,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:09,586 INFO L276 IsEmpty]: Start isEmpty. Operand 9863 states and 44551 transitions. [2021-06-05 15:12:09,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:09,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:09,602 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, 1, 1, 1] [2021-06-05 15:12:09,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:09,802 INFO L430 AbstractCegarLoop]: === Iteration 285 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:09,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:09,802 INFO L82 PathProgramCache]: Analyzing trace with hash -602166540, now seen corresponding path program 204 times [2021-06-05 15:12:09,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:09,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861367698] [2021-06-05 15:12:09,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:10,056 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 15:12:10,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:10,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861367698] [2021-06-05 15:12:10,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861367698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:10,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690996020] [2021-06-05 15:12:10,056 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 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 15:12:10,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:12:10,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:10,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:10,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:10,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:10,280 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:12:10,280 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 27 treesize of output 55 [2021-06-05 15:12:10,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:12:10,314 INFO L628 ElimStorePlain]: treesize reduction 67, result has 24.7 percent of original size [2021-06-05 15:12:10,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:10,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 15:12:10,443 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 15:12:10,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690996020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:10,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:10,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:12:10,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391594752] [2021-06-05 15:12:10,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:12:10,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:10,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:12:10,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:12:10,444 INFO L87 Difference]: Start difference. First operand 9863 states and 44551 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:12,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:12,066 INFO L93 Difference]: Finished difference Result 10918 states and 48527 transitions. [2021-06-05 15:12:12,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:12:12,066 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:12,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:12,091 INFO L225 Difference]: With dead ends: 10918 [2021-06-05 15:12:12,091 INFO L226 Difference]: Without dead ends: 10887 [2021-06-05 15:12:12,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1365.9ms TimeCoverageRelationStatistics Valid=315, Invalid=2441, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:12:12,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10887 states. [2021-06-05 15:12:12,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10887 to 9954. [2021-06-05 15:12:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9954 states, 9953 states have (on average 4.517532402290767) internal successors, (44963), 9953 states have internal predecessors, (44963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9954 states to 9954 states and 44963 transitions. [2021-06-05 15:12:12,263 INFO L78 Accepts]: Start accepts. Automaton has 9954 states and 44963 transitions. Word has length 33 [2021-06-05 15:12:12,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:12,263 INFO L482 AbstractCegarLoop]: Abstraction has 9954 states and 44963 transitions. [2021-06-05 15:12:12,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:12,263 INFO L276 IsEmpty]: Start isEmpty. Operand 9954 states and 44963 transitions. [2021-06-05 15:12:12,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:12,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:12,279 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, 1, 1, 1] [2021-06-05 15:12:12,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 15:12:12,480 INFO L430 AbstractCegarLoop]: === Iteration 286 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:12,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:12,480 INFO L82 PathProgramCache]: Analyzing trace with hash 701106066, now seen corresponding path program 205 times [2021-06-05 15:12:12,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:12,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172361214] [2021-06-05 15:12:12,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:12,647 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 15:12:12,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:12,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172361214] [2021-06-05 15:12:12,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172361214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:12,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472753644] [2021-06-05 15:12:12,648 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 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 15:12:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:12,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:12,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:12,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:12,827 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 28 treesize of output 12 [2021-06-05 15:12:12,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:12,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:12,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:12,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:12:12,906 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 15:12:12,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472753644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:12,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:12,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:12:12,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649339485] [2021-06-05 15:12:12,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:12:12,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:12,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:12:12,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:12,907 INFO L87 Difference]: Start difference. First operand 9954 states and 44963 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:14,250 INFO L93 Difference]: Finished difference Result 11352 states and 50202 transitions. [2021-06-05 15:12:14,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:12:14,250 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:14,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:14,277 INFO L225 Difference]: With dead ends: 11352 [2021-06-05 15:12:14,277 INFO L226 Difference]: Without dead ends: 11320 [2021-06-05 15:12:14,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1084.5ms TimeCoverageRelationStatistics Valid=363, Invalid=2087, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:12:14,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11320 states. [2021-06-05 15:12:14,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11320 to 10028. [2021-06-05 15:12:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10028 states, 10027 states have (on average 4.520394933679066) internal successors, (45326), 10027 states have internal predecessors, (45326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10028 states to 10028 states and 45326 transitions. [2021-06-05 15:12:14,458 INFO L78 Accepts]: Start accepts. Automaton has 10028 states and 45326 transitions. Word has length 33 [2021-06-05 15:12:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:14,458 INFO L482 AbstractCegarLoop]: Abstraction has 10028 states and 45326 transitions. [2021-06-05 15:12:14,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 10028 states and 45326 transitions. [2021-06-05 15:12:14,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:14,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:14,474 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, 1, 1, 1] [2021-06-05 15:12:14,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:14,675 INFO L430 AbstractCegarLoop]: === Iteration 287 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:14,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:14,675 INFO L82 PathProgramCache]: Analyzing trace with hash -967287376, now seen corresponding path program 206 times [2021-06-05 15:12:14,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:14,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086886818] [2021-06-05 15:12:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:14,845 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 15:12:14,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:14,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086886818] [2021-06-05 15:12:14,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086886818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:14,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823827880] [2021-06-05 15:12:14,845 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 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 15:12:14,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:14,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:14,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:14,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:15,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:15,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:12:15,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:15,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:15,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:15,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 15:12:15,233 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 15:12:15,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823827880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:15,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:15,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:12:15,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880647505] [2021-06-05 15:12:15,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:12:15,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:15,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:12:15,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:12:15,234 INFO L87 Difference]: Start difference. First operand 10028 states and 45326 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 15:12:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:16,534 INFO L93 Difference]: Finished difference Result 10881 states and 48527 transitions. [2021-06-05 15:12:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:12:16,535 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 15:12:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:16,560 INFO L225 Difference]: With dead ends: 10881 [2021-06-05 15:12:16,560 INFO L226 Difference]: Without dead ends: 10863 [2021-06-05 15:12:16,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1157.9ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:12:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10863 states. [2021-06-05 15:12:16,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10863 to 10024. [2021-06-05 15:12:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10024 states, 10023 states have (on average 4.5208021550434) internal successors, (45312), 10023 states have internal predecessors, (45312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 45312 transitions. [2021-06-05 15:12:16,732 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 45312 transitions. Word has length 33 [2021-06-05 15:12:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:16,732 INFO L482 AbstractCegarLoop]: Abstraction has 10024 states and 45312 transitions. [2021-06-05 15:12:16,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 15:12:16,733 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 45312 transitions. [2021-06-05 15:12:16,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:16,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:16,749 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, 1, 1, 1] [2021-06-05 15:12:16,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 15:12:16,949 INFO L430 AbstractCegarLoop]: === Iteration 288 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:16,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:16,950 INFO L82 PathProgramCache]: Analyzing trace with hash 647719546, now seen corresponding path program 207 times [2021-06-05 15:12:16,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:16,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554155406] [2021-06-05 15:12:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:17,174 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 15:12:17,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:17,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554155406] [2021-06-05 15:12:17,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554155406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:17,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484717125] [2021-06-05 15:12:17,174 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 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 15:12:17,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:12:17,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:17,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:17,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:17,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-06-05 15:12:17,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:17,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:17,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:17,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-05 15:12:17,539 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 15:12:17,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484717125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:17,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:17,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:12:17,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931401536] [2021-06-05 15:12:17,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:12:17,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:17,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:12:17,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:12:17,540 INFO L87 Difference]: Start difference. First operand 10024 states and 45312 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 15:12:17,672 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-06-05 15:12:17,929 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-06-05 15:12:18,624 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 15:12:20,414 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 15:12:20,746 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 15:12:20,917 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 15:12:21,095 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-05 15:12:21,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:21,310 INFO L93 Difference]: Finished difference Result 12059 states and 52103 transitions. [2021-06-05 15:12:21,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:12:21,310 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 15:12:21,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:21,336 INFO L225 Difference]: With dead ends: 12059 [2021-06-05 15:12:21,337 INFO L226 Difference]: Without dead ends: 11998 [2021-06-05 15:12:21,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 3261.2ms TimeCoverageRelationStatistics Valid=668, Invalid=3888, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:12:21,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11998 states. [2021-06-05 15:12:21,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11998 to 9947. [2021-06-05 15:12:21,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9947 states, 9946 states have (on average 4.520108586366378) internal successors, (44957), 9946 states have internal predecessors, (44957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9947 states to 9947 states and 44957 transitions. [2021-06-05 15:12:21,528 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 44957 transitions. Word has length 33 [2021-06-05 15:12:21,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:21,528 INFO L482 AbstractCegarLoop]: Abstraction has 9947 states and 44957 transitions. [2021-06-05 15:12:21,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 15:12:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 44957 transitions. [2021-06-05 15:12:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:21,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:21,544 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, 1, 1, 1] [2021-06-05 15:12:21,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 15:12:21,745 INFO L430 AbstractCegarLoop]: === Iteration 289 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:21,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:21,745 INFO L82 PathProgramCache]: Analyzing trace with hash -82934220, now seen corresponding path program 208 times [2021-06-05 15:12:21,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:21,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352556835] [2021-06-05 15:12:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:21,918 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 15:12:21,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:21,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352556835] [2021-06-05 15:12:21,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352556835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:21,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601270970] [2021-06-05 15:12:21,918 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 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 15:12:21,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:21,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:21,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:21,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:22,109 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 15:12:22,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:22,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:22,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:22,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:12:22,188 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 15:12:22,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601270970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:22,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:22,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:12:22,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140992448] [2021-06-05 15:12:22,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:22,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:22,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:22,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:22,189 INFO L87 Difference]: Start difference. First operand 9947 states and 44957 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:24,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:24,016 INFO L93 Difference]: Finished difference Result 10698 states and 47935 transitions. [2021-06-05 15:12:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:12:24,017 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:24,041 INFO L225 Difference]: With dead ends: 10698 [2021-06-05 15:12:24,041 INFO L226 Difference]: Without dead ends: 10658 [2021-06-05 15:12:24,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1391.1ms TimeCoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:12:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10658 states. [2021-06-05 15:12:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10658 to 9950. [2021-06-05 15:12:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9950 states, 9949 states have (on average 4.519348678259122) internal successors, (44963), 9949 states have internal predecessors, (44963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9950 states to 9950 states and 44963 transitions. [2021-06-05 15:12:24,207 INFO L78 Accepts]: Start accepts. Automaton has 9950 states and 44963 transitions. Word has length 33 [2021-06-05 15:12:24,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:24,207 INFO L482 AbstractCegarLoop]: Abstraction has 9950 states and 44963 transitions. [2021-06-05 15:12:24,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand 9950 states and 44963 transitions. [2021-06-05 15:12:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:24,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:24,223 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, 1, 1, 1] [2021-06-05 15:12:24,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:24,424 INFO L430 AbstractCegarLoop]: === Iteration 290 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:24,424 INFO L82 PathProgramCache]: Analyzing trace with hash -646531644, now seen corresponding path program 209 times [2021-06-05 15:12:24,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:24,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023338803] [2021-06-05 15:12:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:24,595 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 15:12:24,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:24,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023338803] [2021-06-05 15:12:24,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023338803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:24,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197777263] [2021-06-05 15:12:24,596 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 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 15:12:24,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:12:24,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:24,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:24,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:24,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:24,782 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 28 treesize of output 12 [2021-06-05 15:12:24,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:24,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:24,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:24,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:12:24,889 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 15:12:24,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197777263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:24,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:24,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:12:24,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746484170] [2021-06-05 15:12:24,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:24,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:24,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:24,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:24,890 INFO L87 Difference]: Start difference. First operand 9950 states and 44963 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:26,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:26,635 INFO L93 Difference]: Finished difference Result 11313 states and 50203 transitions. [2021-06-05 15:12:26,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:12:26,635 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:26,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:26,662 INFO L225 Difference]: With dead ends: 11313 [2021-06-05 15:12:26,662 INFO L226 Difference]: Without dead ends: 11231 [2021-06-05 15:12:26,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1414.6ms TimeCoverageRelationStatistics Valid=376, Invalid=2594, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:12:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11231 states. [2021-06-05 15:12:26,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11231 to 9959. [2021-06-05 15:12:26,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9959 states, 9958 states have (on average 4.519783088973689) internal successors, (45008), 9958 states have internal predecessors, (45008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9959 states to 9959 states and 45008 transitions. [2021-06-05 15:12:26,901 INFO L78 Accepts]: Start accepts. Automaton has 9959 states and 45008 transitions. Word has length 33 [2021-06-05 15:12:26,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:26,901 INFO L482 AbstractCegarLoop]: Abstraction has 9959 states and 45008 transitions. [2021-06-05 15:12:26,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:26,902 INFO L276 IsEmpty]: Start isEmpty. Operand 9959 states and 45008 transitions. [2021-06-05 15:12:26,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:26,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:26,918 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, 1, 1, 1] [2021-06-05 15:12:27,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-05 15:12:27,118 INFO L430 AbstractCegarLoop]: === Iteration 291 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:27,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:27,119 INFO L82 PathProgramCache]: Analyzing trace with hash -326850790, now seen corresponding path program 210 times [2021-06-05 15:12:27,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:27,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670031836] [2021-06-05 15:12:27,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:27,290 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 15:12:27,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:27,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670031836] [2021-06-05 15:12:27,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670031836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:27,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721507316] [2021-06-05 15:12:27,290 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 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 15:12:27,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:12:27,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:27,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:27,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:27,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:27,590 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:12:27,590 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 33 treesize of output 61 [2021-06-05 15:12:27,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:12:27,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:27,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:27,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-06-05 15:12:27,686 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 15:12:27,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721507316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:27,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:27,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:12:27,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050694452] [2021-06-05 15:12:27,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:12:27,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:27,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:12:27,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:12:27,687 INFO L87 Difference]: Start difference. First operand 9959 states and 45008 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:29,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:29,018 INFO L93 Difference]: Finished difference Result 10540 states and 47204 transitions. [2021-06-05 15:12:29,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:12:29,019 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:29,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:29,043 INFO L225 Difference]: With dead ends: 10540 [2021-06-05 15:12:29,043 INFO L226 Difference]: Without dead ends: 10486 [2021-06-05 15:12:29,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1092.1ms TimeCoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:12:29,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10486 states. [2021-06-05 15:12:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10486 to 9944. [2021-06-05 15:12:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9944 states, 9943 states have (on average 4.5209695262999094) internal successors, (44952), 9943 states have internal predecessors, (44952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9944 states to 9944 states and 44952 transitions. [2021-06-05 15:12:29,217 INFO L78 Accepts]: Start accepts. Automaton has 9944 states and 44952 transitions. Word has length 33 [2021-06-05 15:12:29,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:29,217 INFO L482 AbstractCegarLoop]: Abstraction has 9944 states and 44952 transitions. [2021-06-05 15:12:29,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:29,217 INFO L276 IsEmpty]: Start isEmpty. Operand 9944 states and 44952 transitions. [2021-06-05 15:12:29,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:29,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:29,234 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, 1, 1, 1] [2021-06-05 15:12:29,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:29,434 INFO L430 AbstractCegarLoop]: === Iteration 292 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:29,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:29,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1708994490, now seen corresponding path program 211 times [2021-06-05 15:12:29,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:29,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295960434] [2021-06-05 15:12:29,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:29,607 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 15:12:29,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:29,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295960434] [2021-06-05 15:12:29,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295960434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:29,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995205607] [2021-06-05 15:12:29,608 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 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 15:12:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:29,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:29,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:29,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:29,796 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 28 treesize of output 12 [2021-06-05 15:12:29,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:29,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:29,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:29,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:12:29,874 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 15:12:29,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995205607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:29,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:29,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:12:29,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008457132] [2021-06-05 15:12:29,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:29,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:29,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:29,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:29,875 INFO L87 Difference]: Start difference. First operand 9944 states and 44952 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:31,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:31,820 INFO L93 Difference]: Finished difference Result 11135 states and 49694 transitions. [2021-06-05 15:12:31,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:12:31,820 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:31,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:31,845 INFO L225 Difference]: With dead ends: 11135 [2021-06-05 15:12:31,845 INFO L226 Difference]: Without dead ends: 11104 [2021-06-05 15:12:31,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1577.2ms TimeCoverageRelationStatistics Valid=398, Invalid=2572, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:12:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11104 states. [2021-06-05 15:12:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11104 to 10062. [2021-06-05 15:12:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10062 states, 10061 states have (on average 4.520922373521519) internal successors, (45485), 10061 states have internal predecessors, (45485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:32,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10062 states to 10062 states and 45485 transitions. [2021-06-05 15:12:32,017 INFO L78 Accepts]: Start accepts. Automaton has 10062 states and 45485 transitions. Word has length 33 [2021-06-05 15:12:32,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:32,017 INFO L482 AbstractCegarLoop]: Abstraction has 10062 states and 45485 transitions. [2021-06-05 15:12:32,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:32,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10062 states and 45485 transitions. [2021-06-05 15:12:32,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:32,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:32,033 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, 1, 1, 1] [2021-06-05 15:12:32,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 15:12:32,234 INFO L430 AbstractCegarLoop]: === Iteration 293 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:32,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:32,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1282700200, now seen corresponding path program 212 times [2021-06-05 15:12:32,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:32,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629628705] [2021-06-05 15:12:32,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:32,404 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 15:12:32,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:32,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629628705] [2021-06-05 15:12:32,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629628705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:32,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178491025] [2021-06-05 15:12:32,405 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 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 15:12:32,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:32,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:32,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:32,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:32,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:32,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2021-06-05 15:12:32,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:32,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:32,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:32,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:39 [2021-06-05 15:12:32,776 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 15:12:32,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178491025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:32,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:32,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:12:32,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623032204] [2021-06-05 15:12:32,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:12:32,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:32,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:12:32,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:12:32,777 INFO L87 Difference]: Start difference. First operand 10062 states and 45485 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:34,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:34,021 INFO L93 Difference]: Finished difference Result 10694 states and 47758 transitions. [2021-06-05 15:12:34,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:12:34,021 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:34,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:34,047 INFO L225 Difference]: With dead ends: 10694 [2021-06-05 15:12:34,047 INFO L226 Difference]: Without dead ends: 10677 [2021-06-05 15:12:34,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1033.1ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:12:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2021-06-05 15:12:34,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 10062. [2021-06-05 15:12:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10062 states, 10061 states have (on average 4.520226617632442) internal successors, (45478), 10061 states have internal predecessors, (45478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:34,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10062 states to 10062 states and 45478 transitions. [2021-06-05 15:12:34,217 INFO L78 Accepts]: Start accepts. Automaton has 10062 states and 45478 transitions. Word has length 33 [2021-06-05 15:12:34,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:34,217 INFO L482 AbstractCegarLoop]: Abstraction has 10062 states and 45478 transitions. [2021-06-05 15:12:34,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 10062 states and 45478 transitions. [2021-06-05 15:12:34,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:34,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:34,234 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, 1, 1, 1] [2021-06-05 15:12:34,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 15:12:34,435 INFO L430 AbstractCegarLoop]: === Iteration 294 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:34,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2112905024, now seen corresponding path program 213 times [2021-06-05 15:12:34,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:34,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041393] [2021-06-05 15:12:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:34,759 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 15:12:34,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:34,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041393] [2021-06-05 15:12:34,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:34,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202535278] [2021-06-05 15:12:34,759 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 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 15:12:34,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:12:34,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:34,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:34,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:34,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:34,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:12:34,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:34,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:34,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:34,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 15:12:35,147 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 15:12:35,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202535278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:35,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:35,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:12:35,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687000076] [2021-06-05 15:12:35,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:12:35,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:35,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:12:35,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:12:35,148 INFO L87 Difference]: Start difference. First operand 10062 states and 45478 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:35,291 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-06-05 15:12:35,518 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2021-06-05 15:12:36,042 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 15:12:36,272 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-06-05 15:12:38,162 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-06-05 15:12:38,434 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-05 15:12:38,630 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-05 15:12:38,817 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-06-05 15:12:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:38,830 INFO L93 Difference]: Finished difference Result 11129 states and 49470 transitions. [2021-06-05 15:12:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:12:38,830 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:38,856 INFO L225 Difference]: With dead ends: 11129 [2021-06-05 15:12:38,856 INFO L226 Difference]: Without dead ends: 11106 [2021-06-05 15:12:38,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 3203.4ms TimeCoverageRelationStatistics Valid=494, Invalid=3288, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:12:38,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11106 states. [2021-06-05 15:12:38,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11106 to 10062. [2021-06-05 15:12:39,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10062 states, 10061 states have (on average 4.520226617632442) internal successors, (45478), 10061 states have internal predecessors, (45478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10062 states to 10062 states and 45478 transitions. [2021-06-05 15:12:39,131 INFO L78 Accepts]: Start accepts. Automaton has 10062 states and 45478 transitions. Word has length 33 [2021-06-05 15:12:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:39,131 INFO L482 AbstractCegarLoop]: Abstraction has 10062 states and 45478 transitions. [2021-06-05 15:12:39,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 10062 states and 45478 transitions. [2021-06-05 15:12:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:39,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:39,149 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, 1, 1, 1] [2021-06-05 15:12:39,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 15:12:39,350 INFO L430 AbstractCegarLoop]: === Iteration 295 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:39,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:39,350 INFO L82 PathProgramCache]: Analyzing trace with hash 332306722, now seen corresponding path program 214 times [2021-06-05 15:12:39,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:39,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918613169] [2021-06-05 15:12:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:39,587 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 15:12:39,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:39,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918613169] [2021-06-05 15:12:39,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918613169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:39,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254490682] [2021-06-05 15:12:39,587 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 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 15:12:39,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:39,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:39,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:39,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:39,760 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 15:12:39,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:39,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:39,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:39,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:12:39,839 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 15:12:39,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254490682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:39,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:39,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:12:39,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062860800] [2021-06-05 15:12:39,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:12:39,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:39,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:12:39,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:39,840 INFO L87 Difference]: Start difference. First operand 10062 states and 45478 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:40,834 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 15:12:41,020 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 15:12:41,300 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-05 15:12:42,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:42,503 INFO L93 Difference]: Finished difference Result 11241 states and 50036 transitions. [2021-06-05 15:12:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:12:42,503 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:42,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:42,530 INFO L225 Difference]: With dead ends: 11241 [2021-06-05 15:12:42,530 INFO L226 Difference]: Without dead ends: 11184 [2021-06-05 15:12:42,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 2367.0ms TimeCoverageRelationStatistics Valid=499, Invalid=2807, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:12:42,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11184 states. [2021-06-05 15:12:42,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11184 to 10016. [2021-06-05 15:12:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10016 states, 10015 states have (on average 4.52061907139291) internal successors, (45274), 10015 states have internal predecessors, (45274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10016 states to 10016 states and 45274 transitions. [2021-06-05 15:12:42,704 INFO L78 Accepts]: Start accepts. Automaton has 10016 states and 45274 transitions. Word has length 33 [2021-06-05 15:12:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:42,704 INFO L482 AbstractCegarLoop]: Abstraction has 10016 states and 45274 transitions. [2021-06-05 15:12:42,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 10016 states and 45274 transitions. [2021-06-05 15:12:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:42,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:42,721 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, 1, 1, 1] [2021-06-05 15:12:42,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:42,921 INFO L430 AbstractCegarLoop]: === Iteration 296 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:42,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2066740486, now seen corresponding path program 215 times [2021-06-05 15:12:42,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:42,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250299446] [2021-06-05 15:12:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:43,100 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 15:12:43,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:43,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250299446] [2021-06-05 15:12:43,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250299446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:43,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613872946] [2021-06-05 15:12:43,101 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 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 15:12:43,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:12:43,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:43,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:43,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:43,288 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 15:12:43,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:43,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:43,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:43,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:12:43,368 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 15:12:43,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613872946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:43,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:43,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:12:43,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049433604] [2021-06-05 15:12:43,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:43,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:43,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:43,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:43,369 INFO L87 Difference]: Start difference. First operand 10016 states and 45274 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:45,271 INFO L93 Difference]: Finished difference Result 10688 states and 47966 transitions. [2021-06-05 15:12:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:12:45,271 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:45,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:45,296 INFO L225 Difference]: With dead ends: 10688 [2021-06-05 15:12:45,297 INFO L226 Difference]: Without dead ends: 10636 [2021-06-05 15:12:45,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1578.3ms TimeCoverageRelationStatistics Valid=344, Invalid=2308, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:12:45,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10636 states. [2021-06-05 15:12:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10636 to 9992. [2021-06-05 15:12:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9992 states, 9991 states have (on average 4.520868781903713) internal successors, (45168), 9991 states have internal predecessors, (45168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:45,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9992 states to 9992 states and 45168 transitions. [2021-06-05 15:12:45,480 INFO L78 Accepts]: Start accepts. Automaton has 9992 states and 45168 transitions. Word has length 33 [2021-06-05 15:12:45,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:45,480 INFO L482 AbstractCegarLoop]: Abstraction has 9992 states and 45168 transitions. [2021-06-05 15:12:45,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 9992 states and 45168 transitions. [2021-06-05 15:12:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:45,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:45,497 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, 1, 1, 1] [2021-06-05 15:12:45,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 15:12:45,698 INFO L430 AbstractCegarLoop]: === Iteration 297 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:45,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:45,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1984310240, now seen corresponding path program 216 times [2021-06-05 15:12:45,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:45,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846778412] [2021-06-05 15:12:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:45,877 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 15:12:45,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:45,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846778412] [2021-06-05 15:12:45,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846778412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:45,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24066470] [2021-06-05 15:12:45,877 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 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 15:12:45,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:12:45,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:45,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:45,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:46,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:46,190 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:12:46,190 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 33 treesize of output 61 [2021-06-05 15:12:46,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:12:46,214 INFO L628 ElimStorePlain]: treesize reduction 52, result has 29.7 percent of original size [2021-06-05 15:12:46,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:46,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-06-05 15:12:46,306 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 15:12:46,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24066470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:46,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:46,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:12:46,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541131195] [2021-06-05 15:12:46,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:12:46,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:46,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:12:46,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:12:46,307 INFO L87 Difference]: Start difference. First operand 9992 states and 45168 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:47,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:47,796 INFO L93 Difference]: Finished difference Result 10575 states and 47307 transitions. [2021-06-05 15:12:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:12:47,796 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:47,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:47,820 INFO L225 Difference]: With dead ends: 10575 [2021-06-05 15:12:47,820 INFO L226 Difference]: Without dead ends: 10521 [2021-06-05 15:12:47,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1136.4ms TimeCoverageRelationStatistics Valid=181, Invalid=1889, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:12:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10521 states. [2021-06-05 15:12:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10521 to 9971. [2021-06-05 15:12:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9971 states, 9970 states have (on average 4.519959879638916) internal successors, (45064), 9970 states have internal predecessors, (45064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9971 states to 9971 states and 45064 transitions. [2021-06-05 15:12:48,041 INFO L78 Accepts]: Start accepts. Automaton has 9971 states and 45064 transitions. Word has length 33 [2021-06-05 15:12:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:48,041 INFO L482 AbstractCegarLoop]: Abstraction has 9971 states and 45064 transitions. [2021-06-05 15:12:48,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 9971 states and 45064 transitions. [2021-06-05 15:12:48,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:48,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:48,058 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, 1, 1, 1] [2021-06-05 15:12:48,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:48,258 INFO L430 AbstractCegarLoop]: === Iteration 298 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:48,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:48,259 INFO L82 PathProgramCache]: Analyzing trace with hash -155981062, now seen corresponding path program 217 times [2021-06-05 15:12:48,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:48,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511889908] [2021-06-05 15:12:48,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:48,473 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 15:12:48,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:48,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511889908] [2021-06-05 15:12:48,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511889908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:48,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470045242] [2021-06-05 15:12:48,473 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 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 15:12:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:48,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:48,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:48,700 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 15:12:48,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:48,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:48,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:48,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:12:48,757 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 15:12:48,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470045242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:48,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:48,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:12:48,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58739277] [2021-06-05 15:12:48,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:48,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:48,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:48,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:48,758 INFO L87 Difference]: Start difference. First operand 9971 states and 45064 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:50,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:50,192 INFO L93 Difference]: Finished difference Result 10401 states and 46786 transitions. [2021-06-05 15:12:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:12:50,193 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:50,218 INFO L225 Difference]: With dead ends: 10401 [2021-06-05 15:12:50,218 INFO L226 Difference]: Without dead ends: 10349 [2021-06-05 15:12:50,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1159.1ms TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:12:50,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10349 states. [2021-06-05 15:12:50,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10349 to 9971. [2021-06-05 15:12:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9971 states, 9970 states have (on average 4.519759277833501) internal successors, (45062), 9970 states have internal predecessors, (45062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9971 states to 9971 states and 45062 transitions. [2021-06-05 15:12:50,394 INFO L78 Accepts]: Start accepts. Automaton has 9971 states and 45062 transitions. Word has length 33 [2021-06-05 15:12:50,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:50,394 INFO L482 AbstractCegarLoop]: Abstraction has 9971 states and 45062 transitions. [2021-06-05 15:12:50,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:50,394 INFO L276 IsEmpty]: Start isEmpty. Operand 9971 states and 45062 transitions. [2021-06-05 15:12:50,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:50,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:50,411 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, 1, 1, 1] [2021-06-05 15:12:50,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 15:12:50,612 INFO L430 AbstractCegarLoop]: === Iteration 299 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:50,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:50,612 INFO L82 PathProgramCache]: Analyzing trace with hash -607226230, now seen corresponding path program 218 times [2021-06-05 15:12:50,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:50,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314326573] [2021-06-05 15:12:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:50,790 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 15:12:50,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:50,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314326573] [2021-06-05 15:12:50,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314326573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:50,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829117462] [2021-06-05 15:12:50,790 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 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 15:12:50,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:50,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:50,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:50,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:51,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:51,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:12:51,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:51,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:51,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:51,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:12:51,160 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 15:12:51,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829117462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:51,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:51,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:12:51,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847884494] [2021-06-05 15:12:51,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:12:51,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:51,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:12:51,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:12:51,161 INFO L87 Difference]: Start difference. First operand 9971 states and 45062 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:52,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:52,334 INFO L93 Difference]: Finished difference Result 10564 states and 47382 transitions. [2021-06-05 15:12:52,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:12:52,335 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:12:52,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:52,359 INFO L225 Difference]: With dead ends: 10564 [2021-06-05 15:12:52,359 INFO L226 Difference]: Without dead ends: 10508 [2021-06-05 15:12:52,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 910.3ms TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:12:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10508 states. [2021-06-05 15:12:52,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10508 to 9944. [2021-06-05 15:12:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9944 states, 9943 states have (on average 4.5209695262999094) internal successors, (44952), 9943 states have internal predecessors, (44952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:52,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9944 states to 9944 states and 44952 transitions. [2021-06-05 15:12:52,524 INFO L78 Accepts]: Start accepts. Automaton has 9944 states and 44952 transitions. Word has length 33 [2021-06-05 15:12:52,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:52,524 INFO L482 AbstractCegarLoop]: Abstraction has 9944 states and 44952 transitions. [2021-06-05 15:12:52,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:52,524 INFO L276 IsEmpty]: Start isEmpty. Operand 9944 states and 44952 transitions. [2021-06-05 15:12:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:52,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:52,540 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, 1, 1, 1] [2021-06-05 15:12:52,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 15:12:52,741 INFO L430 AbstractCegarLoop]: === Iteration 300 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:52,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1400551568, now seen corresponding path program 219 times [2021-06-05 15:12:52,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:52,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78842126] [2021-06-05 15:12:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:52,956 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 15:12:52,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:52,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78842126] [2021-06-05 15:12:52,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78842126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:52,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968069888] [2021-06-05 15:12:52,956 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 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 15:12:52,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:12:52,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:52,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:12:52,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:53,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:53,139 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 15:12:53,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:53,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:53,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:53,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-05 15:12:53,288 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 15:12:53,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968069888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:53,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:53,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:12:53,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479802204] [2021-06-05 15:12:53,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:12:53,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:53,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:12:53,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:12:53,289 INFO L87 Difference]: Start difference. First operand 9944 states and 44952 transitions. Second operand has 25 states, 25 states have (on average 2.04) 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 15:12:55,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:55,252 INFO L93 Difference]: Finished difference Result 10784 states and 48281 transitions. [2021-06-05 15:12:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:12:55,253 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) 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 33 [2021-06-05 15:12:55,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:55,279 INFO L225 Difference]: With dead ends: 10784 [2021-06-05 15:12:55,279 INFO L226 Difference]: Without dead ends: 10765 [2021-06-05 15:12:55,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1600.2ms TimeCoverageRelationStatistics Valid=281, Invalid=2071, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:12:55,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10765 states. [2021-06-05 15:12:55,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10765 to 10134. [2021-06-05 15:12:55,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10134 states, 10133 states have (on average 4.524129083193526) internal successors, (45843), 10133 states have internal predecessors, (45843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10134 states to 10134 states and 45843 transitions. [2021-06-05 15:12:55,467 INFO L78 Accepts]: Start accepts. Automaton has 10134 states and 45843 transitions. Word has length 33 [2021-06-05 15:12:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:55,467 INFO L482 AbstractCegarLoop]: Abstraction has 10134 states and 45843 transitions. [2021-06-05 15:12:55,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) 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 15:12:55,468 INFO L276 IsEmpty]: Start isEmpty. Operand 10134 states and 45843 transitions. [2021-06-05 15:12:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:55,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:55,486 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, 1, 1, 1] [2021-06-05 15:12:55,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 15:12:55,687 INFO L430 AbstractCegarLoop]: === Iteration 301 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:55,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:55,687 INFO L82 PathProgramCache]: Analyzing trace with hash -97278962, now seen corresponding path program 220 times [2021-06-05 15:12:55,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:55,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679129344] [2021-06-05 15:12:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:55,977 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 15:12:55,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:55,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679129344] [2021-06-05 15:12:55,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679129344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:55,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506075321] [2021-06-05 15:12:55,978 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 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 15:12:56,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:56,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:56,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:56,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:56,134 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 15:12:56,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:56,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:56,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:56,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:12:56,215 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 15:12:56,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506075321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:56,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:56,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:12:56,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848523698] [2021-06-05 15:12:56,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:56,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:56,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:56,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:56,216 INFO L87 Difference]: Start difference. First operand 10134 states and 45843 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:12:57,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:57,662 INFO L93 Difference]: Finished difference Result 11552 states and 50988 transitions. [2021-06-05 15:12:57,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:12:57,662 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:12:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:57,689 INFO L225 Difference]: With dead ends: 11552 [2021-06-05 15:12:57,689 INFO L226 Difference]: Without dead ends: 11537 [2021-06-05 15:12:57,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1209.3ms TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:12:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11537 states. [2021-06-05 15:12:57,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11537 to 10153. [2021-06-05 15:12:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10153 states, 10152 states have (on average 4.522163120567376) internal successors, (45909), 10152 states have internal predecessors, (45909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:57,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10153 states to 10153 states and 45909 transitions. [2021-06-05 15:12:57,878 INFO L78 Accepts]: Start accepts. Automaton has 10153 states and 45909 transitions. Word has length 33 [2021-06-05 15:12:57,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:57,878 INFO L482 AbstractCegarLoop]: Abstraction has 10153 states and 45909 transitions. [2021-06-05 15:12:57,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:12:57,878 INFO L276 IsEmpty]: Start isEmpty. Operand 10153 states and 45909 transitions. [2021-06-05 15:12:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:12:57,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:57,894 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, 1, 1, 1] [2021-06-05 15:12:58,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:58,094 INFO L430 AbstractCegarLoop]: === Iteration 302 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:58,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:58,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1765672404, now seen corresponding path program 221 times [2021-06-05 15:12:58,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:58,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356702648] [2021-06-05 15:12:58,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:58,307 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 15:12:58,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:58,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356702648] [2021-06-05 15:12:58,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356702648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:58,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748823223] [2021-06-05 15:12:58,307 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 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 15:12:58,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:12:58,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:58,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:12:58,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:58,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:58,470 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 28 treesize of output 12 [2021-06-05 15:12:58,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:58,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:58,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:58,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:12:58,548 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 15:12:58,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748823223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:58,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:58,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:12:58,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836025424] [2021-06-05 15:12:58,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:12:58,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:58,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:12:58,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:12:58,549 INFO L87 Difference]: Start difference. First operand 10153 states and 45909 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 15:12:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:59,967 INFO L93 Difference]: Finished difference Result 11155 states and 49880 transitions. [2021-06-05 15:12:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:12:59,968 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 33 [2021-06-05 15:12:59,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:59,994 INFO L225 Difference]: With dead ends: 11155 [2021-06-05 15:12:59,994 INFO L226 Difference]: Without dead ends: 11129 [2021-06-05 15:12:59,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1123.7ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:13:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11129 states. [2021-06-05 15:13:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11129 to 10128. [2021-06-05 15:13:00,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10128 states, 10127 states have (on average 4.5223659524044635) internal successors, (45798), 10127 states have internal predecessors, (45798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10128 states to 10128 states and 45798 transitions. [2021-06-05 15:13:00,177 INFO L78 Accepts]: Start accepts. Automaton has 10128 states and 45798 transitions. Word has length 33 [2021-06-05 15:13:00,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:00,177 INFO L482 AbstractCegarLoop]: Abstraction has 10128 states and 45798 transitions. [2021-06-05 15:13:00,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 15:13:00,177 INFO L276 IsEmpty]: Start isEmpty. Operand 10128 states and 45798 transitions. [2021-06-05 15:13:00,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:00,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:00,193 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, 1, 1, 1] [2021-06-05 15:13:00,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 15:13:00,394 INFO L430 AbstractCegarLoop]: === Iteration 303 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:00,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1912163614, now seen corresponding path program 222 times [2021-06-05 15:13:00,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:00,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692977291] [2021-06-05 15:13:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:00,619 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 15:13:00,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:00,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692977291] [2021-06-05 15:13:00,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692977291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:00,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072599518] [2021-06-05 15:13:00,619 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 15:13:00,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:13:00,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:00,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:13:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:00,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:00,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:00,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:00,850 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 27 treesize of output 55 [2021-06-05 15:13:00,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:13:00,880 INFO L628 ElimStorePlain]: treesize reduction 65, result has 30.9 percent of original size [2021-06-05 15:13:00,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:00,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:29 [2021-06-05 15:13:01,044 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 15:13:01,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072599518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:01,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:01,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:13:01,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367902402] [2021-06-05 15:13:01,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:13:01,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:01,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:13:01,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:13:01,045 INFO L87 Difference]: Start difference. First operand 10128 states and 45798 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:03,551 INFO L93 Difference]: Finished difference Result 10963 states and 49059 transitions. [2021-06-05 15:13:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:13:03,552 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:03,579 INFO L225 Difference]: With dead ends: 10963 [2021-06-05 15:13:03,579 INFO L226 Difference]: Without dead ends: 10948 [2021-06-05 15:13:03,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1980.3ms TimeCoverageRelationStatistics Valid=453, Invalid=3579, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:13:03,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10948 states. [2021-06-05 15:13:03,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10948 to 10116. [2021-06-05 15:13:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10116 states, 10115 states have (on average 4.52318339100346) internal successors, (45752), 10115 states have internal predecessors, (45752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10116 states to 10116 states and 45752 transitions. [2021-06-05 15:13:03,752 INFO L78 Accepts]: Start accepts. Automaton has 10116 states and 45752 transitions. Word has length 33 [2021-06-05 15:13:03,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:03,752 INFO L482 AbstractCegarLoop]: Abstraction has 10116 states and 45752 transitions. [2021-06-05 15:13:03,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:03,752 INFO L276 IsEmpty]: Start isEmpty. Operand 10116 states and 45752 transitions. [2021-06-05 15:13:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:03,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:03,768 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, 1, 1, 1] [2021-06-05 15:13:03,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:03,968 INFO L430 AbstractCegarLoop]: === Iteration 304 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:03,968 INFO L82 PathProgramCache]: Analyzing trace with hash -307347916, now seen corresponding path program 223 times [2021-06-05 15:13:03,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:03,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380759592] [2021-06-05 15:13:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:04,249 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 15:13:04,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:04,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380759592] [2021-06-05 15:13:04,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380759592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:04,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798438504] [2021-06-05 15:13:04,250 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 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 15:13:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:04,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:04,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:04,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:13:04,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:04,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:04,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:13:04,531 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 37 treesize of output 17 [2021-06-05 15:13:04,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:04,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:04,539 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 15:13:04,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:14 [2021-06-05 15:13:04,608 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 15:13:04,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798438504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:04,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:04,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:13:04,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772007504] [2021-06-05 15:13:04,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:04,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:04,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:04,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:04,609 INFO L87 Difference]: Start difference. First operand 10116 states and 45752 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:05,985 INFO L93 Difference]: Finished difference Result 10595 states and 47550 transitions. [2021-06-05 15:13:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:13:05,986 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:06,011 INFO L225 Difference]: With dead ends: 10595 [2021-06-05 15:13:06,011 INFO L226 Difference]: Without dead ends: 10580 [2021-06-05 15:13:06,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 979.6ms TimeCoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:13:06,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10580 states. [2021-06-05 15:13:06,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10580 to 10107. [2021-06-05 15:13:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10107 states, 10106 states have (on average 4.523946170591728) internal successors, (45719), 10106 states have internal predecessors, (45719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10107 states to 10107 states and 45719 transitions. [2021-06-05 15:13:06,193 INFO L78 Accepts]: Start accepts. Automaton has 10107 states and 45719 transitions. Word has length 33 [2021-06-05 15:13:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:06,194 INFO L482 AbstractCegarLoop]: Abstraction has 10107 states and 45719 transitions. [2021-06-05 15:13:06,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:06,194 INFO L276 IsEmpty]: Start isEmpty. Operand 10107 states and 45719 transitions. [2021-06-05 15:13:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:06,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:06,210 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, 1, 1, 1] [2021-06-05 15:13:06,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:06,411 INFO L430 AbstractCegarLoop]: === Iteration 305 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:06,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:06,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1616955588, now seen corresponding path program 224 times [2021-06-05 15:13:06,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:06,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840371632] [2021-06-05 15:13:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:06,609 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 15:13:06,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:06,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840371632] [2021-06-05 15:13:06,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840371632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:06,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119219700] [2021-06-05 15:13:06,610 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 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 15:13:06,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:06,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:06,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:13:06,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:06,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:06,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:06,831 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 35 treesize of output 35 [2021-06-05 15:13:06,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:13:06,866 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.6 percent of original size [2021-06-05 15:13:06,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:06,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:50 [2021-06-05 15:13:07,041 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 15:13:07,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119219700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:07,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:07,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 15:13:07,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268138315] [2021-06-05 15:13:07,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:13:07,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:07,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:13:07,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:13:07,042 INFO L87 Difference]: Start difference. First operand 10107 states and 45719 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:08,056 INFO L93 Difference]: Finished difference Result 10378 states and 46707 transitions. [2021-06-05 15:13:08,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:13:08,056 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:08,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:08,081 INFO L225 Difference]: With dead ends: 10378 [2021-06-05 15:13:08,081 INFO L226 Difference]: Without dead ends: 10363 [2021-06-05 15:13:08,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 913.1ms TimeCoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:13:08,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10363 states. [2021-06-05 15:13:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10363 to 10101. [2021-06-05 15:13:08,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10101 states, 10100 states have (on average 4.524455445544555) internal successors, (45697), 10100 states have internal predecessors, (45697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:08,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10101 states to 10101 states and 45697 transitions. [2021-06-05 15:13:08,306 INFO L78 Accepts]: Start accepts. Automaton has 10101 states and 45697 transitions. Word has length 33 [2021-06-05 15:13:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:08,306 INFO L482 AbstractCegarLoop]: Abstraction has 10101 states and 45697 transitions. [2021-06-05 15:13:08,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:08,306 INFO L276 IsEmpty]: Start isEmpty. Operand 10101 states and 45697 transitions. [2021-06-05 15:13:08,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:08,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:08,323 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, 1, 1, 1] [2021-06-05 15:13:08,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:08,524 INFO L430 AbstractCegarLoop]: === Iteration 306 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:08,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:08,524 INFO L82 PathProgramCache]: Analyzing trace with hash 31210194, now seen corresponding path program 225 times [2021-06-05 15:13:08,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:08,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749519386] [2021-06-05 15:13:08,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:08,730 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 15:13:08,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:08,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749519386] [2021-06-05 15:13:08,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749519386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:08,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016099624] [2021-06-05 15:13:08,731 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 15:13:08,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:13:08,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:08,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:08,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:08,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:08,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2021-06-05 15:13:08,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:08,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:08,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:08,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:53 [2021-06-05 15:13:09,115 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 15:13:09,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016099624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:09,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:09,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 15:13:09,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377037061] [2021-06-05 15:13:09,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:09,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:09,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:09,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:09,116 INFO L87 Difference]: Start difference. First operand 10101 states and 45697 transitions. Second operand has 22 states, 22 states have (on average 2.0) 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 15:13:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:10,422 INFO L93 Difference]: Finished difference Result 10611 states and 47735 transitions. [2021-06-05 15:13:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:13:10,423 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) 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 33 [2021-06-05 15:13:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:10,447 INFO L225 Difference]: With dead ends: 10611 [2021-06-05 15:13:10,447 INFO L226 Difference]: Without dead ends: 10596 [2021-06-05 15:13:10,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1253.6ms TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:13:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10596 states. [2021-06-05 15:13:10,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10596 to 10113. [2021-06-05 15:13:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10113 states, 10112 states have (on average 4.522250791139241) internal successors, (45729), 10112 states have internal predecessors, (45729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10113 states to 10113 states and 45729 transitions. [2021-06-05 15:13:10,616 INFO L78 Accepts]: Start accepts. Automaton has 10113 states and 45729 transitions. Word has length 33 [2021-06-05 15:13:10,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:10,616 INFO L482 AbstractCegarLoop]: Abstraction has 10113 states and 45729 transitions. [2021-06-05 15:13:10,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) 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 15:13:10,616 INFO L276 IsEmpty]: Start isEmpty. Operand 10113 states and 45729 transitions. [2021-06-05 15:13:10,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:10,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:10,633 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, 1, 1, 1] [2021-06-05 15:13:10,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 15:13:10,833 INFO L430 AbstractCegarLoop]: === Iteration 307 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:10,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:10,833 INFO L82 PathProgramCache]: Analyzing trace with hash 521583988, now seen corresponding path program 226 times [2021-06-05 15:13:10,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:10,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096299196] [2021-06-05 15:13:10,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:11,098 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 15:13:11,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:11,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096299196] [2021-06-05 15:13:11,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096299196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:11,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546477374] [2021-06-05 15:13:11,099 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 15:13:11,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:11,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:11,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:11,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:11,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:13:11,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:11,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:11,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:13:11,444 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 37 treesize of output 17 [2021-06-05 15:13:11,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:11,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:11,452 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 15:13:11,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:14 [2021-06-05 15:13:11,523 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 15:13:11,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546477374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:11,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:11,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:13:11,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404752624] [2021-06-05 15:13:11,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:11,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:11,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:11,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:11,524 INFO L87 Difference]: Start difference. First operand 10113 states and 45729 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:12,835 INFO L93 Difference]: Finished difference Result 10440 states and 46923 transitions. [2021-06-05 15:13:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:13:12,835 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:12,859 INFO L225 Difference]: With dead ends: 10440 [2021-06-05 15:13:12,860 INFO L226 Difference]: Without dead ends: 10425 [2021-06-05 15:13:12,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1100.5ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:13:12,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10425 states. [2021-06-05 15:13:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10425 to 10110. [2021-06-05 15:13:12,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10110 states, 10109 states have (on average 4.522603620536156) internal successors, (45719), 10109 states have internal predecessors, (45719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10110 states to 10110 states and 45719 transitions. [2021-06-05 15:13:13,026 INFO L78 Accepts]: Start accepts. Automaton has 10110 states and 45719 transitions. Word has length 33 [2021-06-05 15:13:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:13,026 INFO L482 AbstractCegarLoop]: Abstraction has 10110 states and 45719 transitions. [2021-06-05 15:13:13,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 10110 states and 45719 transitions. [2021-06-05 15:13:13,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:13,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:13,042 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, 1, 1, 1] [2021-06-05 15:13:13,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 15:13:13,242 INFO L430 AbstractCegarLoop]: === Iteration 308 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:13,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:13,242 INFO L82 PathProgramCache]: Analyzing trace with hash -740889804, now seen corresponding path program 227 times [2021-06-05 15:13:13,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:13,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589896565] [2021-06-05 15:13:13,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:13,447 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 15:13:13,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:13,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589896565] [2021-06-05 15:13:13,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589896565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:13,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125465652] [2021-06-05 15:13:13,447 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 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 15:13:13,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:13:13,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:13,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:13,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:13,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:13,609 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 28 treesize of output 12 [2021-06-05 15:13:13,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:13,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:13,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:13,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-06-05 15:13:13,686 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 15:13:13,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125465652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:13,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:13,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:13:13,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949457121] [2021-06-05 15:13:13,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:13,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:13,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:13,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:13,687 INFO L87 Difference]: Start difference. First operand 10110 states and 45719 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:13:15,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:15,968 INFO L93 Difference]: Finished difference Result 12090 states and 53145 transitions. [2021-06-05 15:13:15,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:13:15,968 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 15:13:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:15,995 INFO L225 Difference]: With dead ends: 12090 [2021-06-05 15:13:15,996 INFO L226 Difference]: Without dead ends: 12040 [2021-06-05 15:13:15,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1804.8ms TimeCoverageRelationStatistics Valid=365, Invalid=2497, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:13:16,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12040 states. [2021-06-05 15:13:16,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12040 to 10371. [2021-06-05 15:13:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10371 states, 10370 states have (on average 4.52526518804243) internal successors, (46927), 10370 states have internal predecessors, (46927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10371 states to 10371 states and 46927 transitions. [2021-06-05 15:13:16,191 INFO L78 Accepts]: Start accepts. Automaton has 10371 states and 46927 transitions. Word has length 33 [2021-06-05 15:13:16,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:16,191 INFO L482 AbstractCegarLoop]: Abstraction has 10371 states and 46927 transitions. [2021-06-05 15:13:16,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:13:16,191 INFO L276 IsEmpty]: Start isEmpty. Operand 10371 states and 46927 transitions. [2021-06-05 15:13:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:16,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:16,294 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, 1, 1, 1] [2021-06-05 15:13:16,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:16,495 INFO L430 AbstractCegarLoop]: === Iteration 309 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:16,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:16,495 INFO L82 PathProgramCache]: Analyzing trace with hash 562382802, now seen corresponding path program 228 times [2021-06-05 15:13:16,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:16,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493565141] [2021-06-05 15:13:16,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:16,706 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 15:13:16,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:16,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493565141] [2021-06-05 15:13:16,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493565141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:16,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454714745] [2021-06-05 15:13:16,707 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 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 15:13:16,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:13:16,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:16,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:13:16,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:16,916 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 15:13:16,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 15:13:16,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:13:16,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:16,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:16,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:14 [2021-06-05 15:13:17,049 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 15:13:17,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454714745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:17,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:17,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:13:17,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666870598] [2021-06-05 15:13:17,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:13:17,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:17,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:13:17,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:13:17,050 INFO L87 Difference]: Start difference. First operand 10371 states and 46927 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:17,907 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 15:13:20,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:20,049 INFO L93 Difference]: Finished difference Result 11669 states and 51773 transitions. [2021-06-05 15:13:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:13:20,049 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:20,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:20,077 INFO L225 Difference]: With dead ends: 11669 [2021-06-05 15:13:20,077 INFO L226 Difference]: Without dead ends: 11647 [2021-06-05 15:13:20,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2212.5ms TimeCoverageRelationStatistics Valid=538, Invalid=3884, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:13:20,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11647 states. [2021-06-05 15:13:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11647 to 10362. [2021-06-05 15:13:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10362 states, 10361 states have (on average 4.525142360775987) internal successors, (46885), 10361 states have internal predecessors, (46885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10362 states to 10362 states and 46885 transitions. [2021-06-05 15:13:20,259 INFO L78 Accepts]: Start accepts. Automaton has 10362 states and 46885 transitions. Word has length 33 [2021-06-05 15:13:20,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:20,259 INFO L482 AbstractCegarLoop]: Abstraction has 10362 states and 46885 transitions. [2021-06-05 15:13:20,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:20,259 INFO L276 IsEmpty]: Start isEmpty. Operand 10362 states and 46885 transitions. [2021-06-05 15:13:20,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:20,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:20,276 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, 1, 1, 1] [2021-06-05 15:13:20,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:20,476 INFO L430 AbstractCegarLoop]: === Iteration 310 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:20,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:20,477 INFO L82 PathProgramCache]: Analyzing trace with hash -336979270, now seen corresponding path program 229 times [2021-06-05 15:13:20,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:20,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820881799] [2021-06-05 15:13:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:20,672 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 15:13:20,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:20,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820881799] [2021-06-05 15:13:20,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820881799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:20,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418169910] [2021-06-05 15:13:20,672 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 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 15:13:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:20,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:20,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:20,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:20,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:20,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:13:20,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:13:20,959 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 15:13:20,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:20,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:20,968 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 15:13:20,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:17 [2021-06-05 15:13:21,104 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 15:13:21,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418169910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:21,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:21,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:13:21,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5634562] [2021-06-05 15:13:21,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:21,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:21,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:21,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:21,105 INFO L87 Difference]: Start difference. First operand 10362 states and 46885 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:22,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:22,612 INFO L93 Difference]: Finished difference Result 11443 states and 50914 transitions. [2021-06-05 15:13:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:13:22,612 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:22,640 INFO L225 Difference]: With dead ends: 11443 [2021-06-05 15:13:22,640 INFO L226 Difference]: Without dead ends: 11392 [2021-06-05 15:13:22,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1177.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1717, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:13:22,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11392 states. [2021-06-05 15:13:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11392 to 10325. [2021-06-05 15:13:22,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10325 states, 10324 states have (on average 4.523924835335142) internal successors, (46705), 10324 states have internal predecessors, (46705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10325 states to 10325 states and 46705 transitions. [2021-06-05 15:13:22,834 INFO L78 Accepts]: Start accepts. Automaton has 10325 states and 46705 transitions. Word has length 33 [2021-06-05 15:13:22,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:22,835 INFO L482 AbstractCegarLoop]: Abstraction has 10325 states and 46705 transitions. [2021-06-05 15:13:22,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 10325 states and 46705 transitions. [2021-06-05 15:13:22,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:22,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:22,852 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, 1, 1, 1] [2021-06-05 15:13:23,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-06-05 15:13:23,052 INFO L430 AbstractCegarLoop]: === Iteration 311 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:23,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:23,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1723141918, now seen corresponding path program 230 times [2021-06-05 15:13:23,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:23,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324151211] [2021-06-05 15:13:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:23,246 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 15:13:23,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:23,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324151211] [2021-06-05 15:13:23,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324151211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:23,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038301165] [2021-06-05 15:13:23,247 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 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 15:13:23,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:23,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:23,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:13:23,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:23,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:23,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:23,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:13:23,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:23,425 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 35 treesize of output 35 [2021-06-05 15:13:23,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:23,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:23,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:23,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:43 [2021-06-05 15:13:23,617 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 15:13:23,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038301165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:23,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:23,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 15:13:23,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024134542] [2021-06-05 15:13:23,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:13:23,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:23,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:13:23,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:13:23,618 INFO L87 Difference]: Start difference. First operand 10325 states and 46705 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:25,069 INFO L93 Difference]: Finished difference Result 10797 states and 48408 transitions. [2021-06-05 15:13:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:13:25,069 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:25,094 INFO L225 Difference]: With dead ends: 10797 [2021-06-05 15:13:25,094 INFO L226 Difference]: Without dead ends: 10753 [2021-06-05 15:13:25,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1213.3ms TimeCoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:13:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10753 states. [2021-06-05 15:13:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10753 to 10304. [2021-06-05 15:13:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10304 states, 10303 states have (on average 4.523439774822867) internal successors, (46605), 10303 states have internal predecessors, (46605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10304 states to 10304 states and 46605 transitions. [2021-06-05 15:13:25,265 INFO L78 Accepts]: Start accepts. Automaton has 10304 states and 46605 transitions. Word has length 33 [2021-06-05 15:13:25,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:25,265 INFO L482 AbstractCegarLoop]: Abstraction has 10304 states and 46605 transitions. [2021-06-05 15:13:25,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 10304 states and 46605 transitions. [2021-06-05 15:13:25,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:25,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:25,281 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, 1, 1, 1] [2021-06-05 15:13:25,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 15:13:25,482 INFO L430 AbstractCegarLoop]: === Iteration 312 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:25,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:25,482 INFO L82 PathProgramCache]: Analyzing trace with hash 352313848, now seen corresponding path program 231 times [2021-06-05 15:13:25,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:25,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094126114] [2021-06-05 15:13:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:25,672 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 15:13:25,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:25,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094126114] [2021-06-05 15:13:25,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094126114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:25,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434498209] [2021-06-05 15:13:25,673 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 15:13:25,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:13:25,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:25,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:25,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:25,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:25,976 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:13:25,976 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 29 treesize of output 57 [2021-06-05 15:13:25,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:13:26,003 INFO L628 ElimStorePlain]: treesize reduction 66, result has 25.0 percent of original size [2021-06-05 15:13:26,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:26,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:22 [2021-06-05 15:13:26,103 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 15:13:26,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434498209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:26,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:26,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:13:26,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257239944] [2021-06-05 15:13:26,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:13:26,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:26,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:13:26,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:13:26,104 INFO L87 Difference]: Start difference. First operand 10304 states and 46605 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:27,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:27,705 INFO L93 Difference]: Finished difference Result 10985 states and 49049 transitions. [2021-06-05 15:13:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:13:27,705 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:27,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:27,730 INFO L225 Difference]: With dead ends: 10985 [2021-06-05 15:13:27,730 INFO L226 Difference]: Without dead ends: 10937 [2021-06-05 15:13:27,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1128.5ms TimeCoverageRelationStatistics Valid=193, Invalid=1969, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:13:27,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10937 states. [2021-06-05 15:13:27,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10937 to 10312. [2021-06-05 15:13:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10312 states, 10311 states have (on average 4.522354766753952) internal successors, (46630), 10311 states have internal predecessors, (46630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10312 states to 10312 states and 46630 transitions. [2021-06-05 15:13:27,914 INFO L78 Accepts]: Start accepts. Automaton has 10312 states and 46630 transitions. Word has length 33 [2021-06-05 15:13:27,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:27,914 INFO L482 AbstractCegarLoop]: Abstraction has 10312 states and 46630 transitions. [2021-06-05 15:13:27,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 10312 states and 46630 transitions. [2021-06-05 15:13:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:27,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:27,931 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, 1, 1, 1] [2021-06-05 15:13:28,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 15:13:28,132 INFO L430 AbstractCegarLoop]: === Iteration 313 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:28,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:28,132 INFO L82 PathProgramCache]: Analyzing trace with hash 786343194, now seen corresponding path program 232 times [2021-06-05 15:13:28,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:28,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580958937] [2021-06-05 15:13:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:28,411 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 15:13:28,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:28,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580958937] [2021-06-05 15:13:28,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580958937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:28,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517283122] [2021-06-05 15:13:28,411 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 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 15:13:28,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:28,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:28,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:28,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:28,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:13:28,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:28,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:28,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:13:28,620 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 37 treesize of output 17 [2021-06-05 15:13:28,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:28,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:28,629 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 15:13:28,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:17 [2021-06-05 15:13:28,718 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 15:13:28,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517283122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:28,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:28,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:13:28,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233846675] [2021-06-05 15:13:28,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:28,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:28,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:28,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:28,719 INFO L87 Difference]: Start difference. First operand 10312 states and 46630 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:30,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:30,185 INFO L93 Difference]: Finished difference Result 10966 states and 48988 transitions. [2021-06-05 15:13:30,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:13:30,185 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:30,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:30,210 INFO L225 Difference]: With dead ends: 10966 [2021-06-05 15:13:30,210 INFO L226 Difference]: Without dead ends: 10922 [2021-06-05 15:13:30,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1023.6ms TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:13:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10922 states. [2021-06-05 15:13:30,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10922 to 10285. [2021-06-05 15:13:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10285 states, 10284 states have (on average 4.521781408012447) internal successors, (46502), 10284 states have internal predecessors, (46502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10285 states to 10285 states and 46502 transitions. [2021-06-05 15:13:30,390 INFO L78 Accepts]: Start accepts. Automaton has 10285 states and 46502 transitions. Word has length 33 [2021-06-05 15:13:30,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:30,390 INFO L482 AbstractCegarLoop]: Abstraction has 10285 states and 46502 transitions. [2021-06-05 15:13:30,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:30,390 INFO L276 IsEmpty]: Start isEmpty. Operand 10285 states and 46502 transitions. [2021-06-05 15:13:30,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:30,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:30,406 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, 1, 1, 1] [2021-06-05 15:13:30,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:30,607 INFO L430 AbstractCegarLoop]: === Iteration 314 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:30,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:30,607 INFO L82 PathProgramCache]: Analyzing trace with hash -957293824, now seen corresponding path program 233 times [2021-06-05 15:13:30,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:30,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058803682] [2021-06-05 15:13:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:30,809 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 15:13:30,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:30,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058803682] [2021-06-05 15:13:30,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058803682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:30,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851704979] [2021-06-05 15:13:30,809 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 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 15:13:30,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:13:30,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:30,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:30,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:31,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:31,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:31,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:13:31,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:13:31,062 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 15:13:31,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:31,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:31,069 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 15:13:31,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 15:13:31,139 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 15:13:31,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851704979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:31,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:31,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:13:31,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979297144] [2021-06-05 15:13:31,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:31,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:31,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:31,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:31,140 INFO L87 Difference]: Start difference. First operand 10285 states and 46502 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:32,291 INFO L93 Difference]: Finished difference Result 10610 states and 47638 transitions. [2021-06-05 15:13:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:13:32,291 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:32,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:32,315 INFO L225 Difference]: With dead ends: 10610 [2021-06-05 15:13:32,316 INFO L226 Difference]: Without dead ends: 10558 [2021-06-05 15:13:32,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 860.6ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:13:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10558 states. [2021-06-05 15:13:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10558 to 10290. [2021-06-05 15:13:32,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10290 states, 10289 states have (on average 4.52084750704636) internal successors, (46515), 10289 states have internal predecessors, (46515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:32,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10290 states to 10290 states and 46515 transitions. [2021-06-05 15:13:32,549 INFO L78 Accepts]: Start accepts. Automaton has 10290 states and 46515 transitions. Word has length 33 [2021-06-05 15:13:32,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:32,549 INFO L482 AbstractCegarLoop]: Abstraction has 10290 states and 46515 transitions. [2021-06-05 15:13:32,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:32,550 INFO L276 IsEmpty]: Start isEmpty. Operand 10290 states and 46515 transitions. [2021-06-05 15:13:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:32,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:32,566 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, 1, 1, 1] [2021-06-05 15:13:32,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable473 [2021-06-05 15:13:32,767 INFO L430 AbstractCegarLoop]: === Iteration 315 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:32,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:32,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1021927330, now seen corresponding path program 234 times [2021-06-05 15:13:32,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:32,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263904968] [2021-06-05 15:13:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:32,964 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 15:13:32,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:32,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263904968] [2021-06-05 15:13:32,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263904968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:32,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60698773] [2021-06-05 15:13:32,965 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 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 15:13:33,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:13:33,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:33,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:33,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:33,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:33,275 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:13:33,276 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 29 treesize of output 57 [2021-06-05 15:13:33,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:13:33,300 INFO L628 ElimStorePlain]: treesize reduction 62, result has 26.2 percent of original size [2021-06-05 15:13:33,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:33,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:22 [2021-06-05 15:13:33,402 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 15:13:33,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60698773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:33,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:33,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:13:33,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877921918] [2021-06-05 15:13:33,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:13:33,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:33,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:13:33,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:13:33,403 INFO L87 Difference]: Start difference. First operand 10290 states and 46515 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:34,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:34,784 INFO L93 Difference]: Finished difference Result 10668 states and 47789 transitions. [2021-06-05 15:13:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:13:34,785 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:34,809 INFO L225 Difference]: With dead ends: 10668 [2021-06-05 15:13:34,810 INFO L226 Difference]: Without dead ends: 10620 [2021-06-05 15:13:34,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1130.5ms TimeCoverageRelationStatistics Valid=188, Invalid=1974, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:13:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10620 states. [2021-06-05 15:13:34,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10620 to 10266. [2021-06-05 15:13:34,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10266 states, 10265 states have (on average 4.520506575742815) internal successors, (46403), 10265 states have internal predecessors, (46403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:34,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10266 states to 10266 states and 46403 transitions. [2021-06-05 15:13:34,987 INFO L78 Accepts]: Start accepts. Automaton has 10266 states and 46403 transitions. Word has length 33 [2021-06-05 15:13:34,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:34,987 INFO L482 AbstractCegarLoop]: Abstraction has 10266 states and 46403 transitions. [2021-06-05 15:13:34,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand 10266 states and 46403 transitions. [2021-06-05 15:13:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:35,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:35,004 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, 1, 1, 1] [2021-06-05 15:13:35,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-05 15:13:35,205 INFO L430 AbstractCegarLoop]: === Iteration 316 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:35,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:35,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1654670000, now seen corresponding path program 235 times [2021-06-05 15:13:35,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:35,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699998983] [2021-06-05 15:13:35,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:35,423 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 15:13:35,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:35,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699998983] [2021-06-05 15:13:35,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699998983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:35,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935752980] [2021-06-05 15:13:35,423 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 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 15:13:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:35,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:35,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:35,596 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 15:13:35,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:35,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:35,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:35,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:13:35,673 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 15:13:35,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935752980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:35,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:35,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:13:35,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965196198] [2021-06-05 15:13:35,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:35,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:35,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:35,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:35,674 INFO L87 Difference]: Start difference. First operand 10266 states and 46403 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:13:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:37,702 INFO L93 Difference]: Finished difference Result 12688 states and 55671 transitions. [2021-06-05 15:13:37,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:13:37,702 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 15:13:37,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:37,734 INFO L225 Difference]: With dead ends: 12688 [2021-06-05 15:13:37,735 INFO L226 Difference]: Without dead ends: 12638 [2021-06-05 15:13:37,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1590.3ms TimeCoverageRelationStatistics Valid=352, Invalid=2300, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:13:37,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12638 states. [2021-06-05 15:13:37,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12638 to 10573. [2021-06-05 15:13:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10573 states, 10572 states have (on average 4.526579644343549) internal successors, (47855), 10572 states have internal predecessors, (47855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:37,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 47855 transitions. [2021-06-05 15:13:37,930 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 47855 transitions. Word has length 33 [2021-06-05 15:13:37,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:37,930 INFO L482 AbstractCegarLoop]: Abstraction has 10573 states and 47855 transitions. [2021-06-05 15:13:37,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:13:37,930 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 47855 transitions. [2021-06-05 15:13:37,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:37,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:37,947 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, 1, 1, 1] [2021-06-05 15:13:38,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 15:13:38,148 INFO L430 AbstractCegarLoop]: === Iteration 317 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:38,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1337024690, now seen corresponding path program 236 times [2021-06-05 15:13:38,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:38,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811951725] [2021-06-05 15:13:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:38,359 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 15:13:38,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:38,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811951725] [2021-06-05 15:13:38,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811951725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:38,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705267870] [2021-06-05 15:13:38,359 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 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 15:13:38,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:38,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:38,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:13:38,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:38,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:38,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:38,529 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 24 treesize of output 30 [2021-06-05 15:13:38,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:38,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:38,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:38,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:32 [2021-06-05 15:13:38,678 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 15:13:38,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705267870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:38,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:38,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:13:38,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836906522] [2021-06-05 15:13:38,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:13:38,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:38,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:13:38,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:13:38,679 INFO L87 Difference]: Start difference. First operand 10573 states and 47855 transitions. Second operand has 25 states, 25 states have (on average 2.0) 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 15:13:40,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:40,444 INFO L93 Difference]: Finished difference Result 11822 states and 52548 transitions. [2021-06-05 15:13:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:13:40,445 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) 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 33 [2021-06-05 15:13:40,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:40,472 INFO L225 Difference]: With dead ends: 11822 [2021-06-05 15:13:40,472 INFO L226 Difference]: Without dead ends: 11800 [2021-06-05 15:13:40,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1496.4ms TimeCoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:13:40,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11800 states. [2021-06-05 15:13:40,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11800 to 10573. [2021-06-05 15:13:40,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10573 states, 10572 states have (on average 4.5262958758986) internal successors, (47852), 10572 states have internal predecessors, (47852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:40,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 47852 transitions. [2021-06-05 15:13:40,661 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 47852 transitions. Word has length 33 [2021-06-05 15:13:40,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:40,661 INFO L482 AbstractCegarLoop]: Abstraction has 10573 states and 47852 transitions. [2021-06-05 15:13:40,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) 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 15:13:40,661 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 47852 transitions. [2021-06-05 15:13:40,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:40,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:40,678 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, 1, 1, 1] [2021-06-05 15:13:40,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:40,879 INFO L430 AbstractCegarLoop]: === Iteration 318 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:40,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:40,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2058580534, now seen corresponding path program 237 times [2021-06-05 15:13:40,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:40,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768853932] [2021-06-05 15:13:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:41,070 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 15:13:41,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:41,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768853932] [2021-06-05 15:13:41,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768853932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:41,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183098586] [2021-06-05 15:13:41,070 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 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 15:13:41,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:13:41,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:41,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:41,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:41,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:41,296 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:13:41,296 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 27 treesize of output 55 [2021-06-05 15:13:41,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:13:41,340 INFO L628 ElimStorePlain]: treesize reduction 74, result has 22.9 percent of original size [2021-06-05 15:13:41,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:41,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-06-05 15:13:41,477 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 15:13:41,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183098586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:41,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:41,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:13:41,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934364636] [2021-06-05 15:13:41,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:13:41,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:41,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:13:41,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:13:41,478 INFO L87 Difference]: Start difference. First operand 10573 states and 47852 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:43,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:43,327 INFO L93 Difference]: Finished difference Result 11922 states and 52942 transitions. [2021-06-05 15:13:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:13:43,328 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:43,354 INFO L225 Difference]: With dead ends: 11922 [2021-06-05 15:13:43,354 INFO L226 Difference]: Without dead ends: 11884 [2021-06-05 15:13:43,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1500.3ms TimeCoverageRelationStatistics Valid=401, Invalid=2905, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:13:43,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11884 states. [2021-06-05 15:13:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11884 to 10643. [2021-06-05 15:13:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10643 states, 10642 states have (on average 4.529975568502161) internal successors, (48208), 10642 states have internal predecessors, (48208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:43,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10643 states to 10643 states and 48208 transitions. [2021-06-05 15:13:43,555 INFO L78 Accepts]: Start accepts. Automaton has 10643 states and 48208 transitions. Word has length 33 [2021-06-05 15:13:43,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:43,555 INFO L482 AbstractCegarLoop]: Abstraction has 10643 states and 48208 transitions. [2021-06-05 15:13:43,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:43,556 INFO L276 IsEmpty]: Start isEmpty. Operand 10643 states and 48208 transitions. [2021-06-05 15:13:43,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:43,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:43,574 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, 1, 1, 1] [2021-06-05 15:13:43,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:43,774 INFO L430 AbstractCegarLoop]: === Iteration 319 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:43,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:43,774 INFO L82 PathProgramCache]: Analyzing trace with hash 277982232, now seen corresponding path program 238 times [2021-06-05 15:13:43,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:43,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952487613] [2021-06-05 15:13:43,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:43,968 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 15:13:43,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:43,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952487613] [2021-06-05 15:13:43,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952487613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:43,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686737233] [2021-06-05 15:13:43,968 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 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 15:13:44,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:44,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:44,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:44,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:44,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:44,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:44,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:13:44,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:13:44,144 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 15:13:44,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:44,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:44,153 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 15:13:44,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:17 [2021-06-05 15:13:44,237 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 15:13:44,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686737233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:44,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:44,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:13:44,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339536807] [2021-06-05 15:13:44,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:44,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:44,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:44,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:44,238 INFO L87 Difference]: Start difference. First operand 10643 states and 48208 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:45,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:45,498 INFO L93 Difference]: Finished difference Result 12186 states and 53817 transitions. [2021-06-05 15:13:45,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:13:45,499 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:45,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:45,527 INFO L225 Difference]: With dead ends: 12186 [2021-06-05 15:13:45,527 INFO L226 Difference]: Without dead ends: 12146 [2021-06-05 15:13:45,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 861.9ms TimeCoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:13:45,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12146 states. [2021-06-05 15:13:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12146 to 10521. [2021-06-05 15:13:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10521 states, 10520 states have (on average 4.530893536121673) internal successors, (47665), 10520 states have internal predecessors, (47665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10521 states to 10521 states and 47665 transitions. [2021-06-05 15:13:45,731 INFO L78 Accepts]: Start accepts. Automaton has 10521 states and 47665 transitions. Word has length 33 [2021-06-05 15:13:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:45,731 INFO L482 AbstractCegarLoop]: Abstraction has 10521 states and 47665 transitions. [2021-06-05 15:13:45,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 10521 states and 47665 transitions. [2021-06-05 15:13:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:45,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:45,748 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, 1, 1, 1] [2021-06-05 15:13:45,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:45,949 INFO L430 AbstractCegarLoop]: === Iteration 320 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:45,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:45,949 INFO L82 PathProgramCache]: Analyzing trace with hash 672417886, now seen corresponding path program 239 times [2021-06-05 15:13:45,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:45,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371864648] [2021-06-05 15:13:45,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:46,137 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 15:13:46,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:46,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371864648] [2021-06-05 15:13:46,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371864648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:46,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821937580] [2021-06-05 15:13:46,138 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 15:13:46,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:13:46,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:46,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:46,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:46,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:46,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:46,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:46,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:46,378 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 27 treesize of output 45 [2021-06-05 15:13:46,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:13:46,409 INFO L628 ElimStorePlain]: treesize reduction 39, result has 45.1 percent of original size [2021-06-05 15:13:46,411 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 15:13:46,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:44 [2021-06-05 15:13:46,535 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 15:13:46,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821937580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:46,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:46,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 15:13:46,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284889655] [2021-06-05 15:13:46,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:13:46,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:46,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:13:46,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:13:46,536 INFO L87 Difference]: Start difference. First operand 10521 states and 47665 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:47,056 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-06-05 15:13:48,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:48,466 INFO L93 Difference]: Finished difference Result 11417 states and 51137 transitions. [2021-06-05 15:13:48,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:13:48,466 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:48,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:48,493 INFO L225 Difference]: With dead ends: 11417 [2021-06-05 15:13:48,493 INFO L226 Difference]: Without dead ends: 11373 [2021-06-05 15:13:48,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1419.8ms TimeCoverageRelationStatistics Valid=280, Invalid=2476, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:13:48,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2021-06-05 15:13:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 10551. [2021-06-05 15:13:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10551 states, 10550 states have (on average 4.532701421800948) internal successors, (47820), 10550 states have internal predecessors, (47820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:48,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10551 states to 10551 states and 47820 transitions. [2021-06-05 15:13:48,681 INFO L78 Accepts]: Start accepts. Automaton has 10551 states and 47820 transitions. Word has length 33 [2021-06-05 15:13:48,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:48,681 INFO L482 AbstractCegarLoop]: Abstraction has 10551 states and 47820 transitions. [2021-06-05 15:13:48,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 10551 states and 47820 transitions. [2021-06-05 15:13:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:48,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:48,699 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, 1, 1, 1] [2021-06-05 15:13:48,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 15:13:48,899 INFO L430 AbstractCegarLoop]: === Iteration 321 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:48,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:48,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1547093644, now seen corresponding path program 240 times [2021-06-05 15:13:48,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:48,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441087364] [2021-06-05 15:13:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:49,089 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 15:13:49,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:49,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441087364] [2021-06-05 15:13:49,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441087364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:49,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561866553] [2021-06-05 15:13:49,090 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 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 15:13:49,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:13:49,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:49,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:13:49,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:49,363 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 15:13:49,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 57 [2021-06-05 15:13:49,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:13:49,380 INFO L628 ElimStorePlain]: treesize reduction 42, result has 20.8 percent of original size [2021-06-05 15:13:49,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:13:49,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 15:13:49,414 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 15:13:49,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561866553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:49,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:49,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 15:13:49,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893175751] [2021-06-05 15:13:49,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:13:49,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:49,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:13:49,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:13:49,415 INFO L87 Difference]: Start difference. First operand 10551 states and 47820 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:50,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:50,892 INFO L93 Difference]: Finished difference Result 11447 states and 51353 transitions. [2021-06-05 15:13:50,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:13:50,893 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:50,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:50,919 INFO L225 Difference]: With dead ends: 11447 [2021-06-05 15:13:50,919 INFO L226 Difference]: Without dead ends: 11414 [2021-06-05 15:13:50,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1025.6ms TimeCoverageRelationStatistics Valid=206, Invalid=1956, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:13:50,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11414 states. [2021-06-05 15:13:51,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11414 to 10551. [2021-06-05 15:13:51,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10551 states, 10550 states have (on average 4.532701421800948) internal successors, (47820), 10550 states have internal predecessors, (47820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10551 states to 10551 states and 47820 transitions. [2021-06-05 15:13:51,103 INFO L78 Accepts]: Start accepts. Automaton has 10551 states and 47820 transitions. Word has length 33 [2021-06-05 15:13:51,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:51,103 INFO L482 AbstractCegarLoop]: Abstraction has 10551 states and 47820 transitions. [2021-06-05 15:13:51,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 10551 states and 47820 transitions. [2021-06-05 15:13:51,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:51,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:51,121 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, 1, 1, 1] [2021-06-05 15:13:51,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 15:13:51,322 INFO L430 AbstractCegarLoop]: === Iteration 322 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:51,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:51,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1113064298, now seen corresponding path program 241 times [2021-06-05 15:13:51,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:51,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035757945] [2021-06-05 15:13:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:51,513 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 15:13:51,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:51,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035757945] [2021-06-05 15:13:51,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035757945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:51,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651484283] [2021-06-05 15:13:51,513 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 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 15:13:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:51,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:51,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:51,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:13:51,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:51,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:51,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:13:51,722 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 37 treesize of output 17 [2021-06-05 15:13:51,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:51,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:51,731 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 15:13:51,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:17 [2021-06-05 15:13:51,819 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 15:13:51,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651484283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:51,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:51,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:13:51,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632558857] [2021-06-05 15:13:51,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:51,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:51,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:51,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:51,820 INFO L87 Difference]: Start difference. First operand 10551 states and 47820 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:53,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:53,188 INFO L93 Difference]: Finished difference Result 11263 states and 50528 transitions. [2021-06-05 15:13:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:13:53,188 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:13:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:53,214 INFO L225 Difference]: With dead ends: 11263 [2021-06-05 15:13:53,214 INFO L226 Difference]: Without dead ends: 11219 [2021-06-05 15:13:53,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1042.8ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:13:53,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11219 states. [2021-06-05 15:13:53,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11219 to 10533. [2021-06-05 15:13:53,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10533 states, 10532 states have (on average 4.533421952145841) internal successors, (47746), 10532 states have internal predecessors, (47746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:53,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10533 states to 10533 states and 47746 transitions. [2021-06-05 15:13:53,395 INFO L78 Accepts]: Start accepts. Automaton has 10533 states and 47746 transitions. Word has length 33 [2021-06-05 15:13:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:53,395 INFO L482 AbstractCegarLoop]: Abstraction has 10533 states and 47746 transitions. [2021-06-05 15:13:53,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 10533 states and 47746 transitions. [2021-06-05 15:13:53,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:53,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:53,412 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, 1, 1, 1] [2021-06-05 15:13:53,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:53,613 INFO L430 AbstractCegarLoop]: === Iteration 323 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:53,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:53,613 INFO L82 PathProgramCache]: Analyzing trace with hash -691009676, now seen corresponding path program 242 times [2021-06-05 15:13:53,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:53,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509781801] [2021-06-05 15:13:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:53,908 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 15:13:53,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:53,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509781801] [2021-06-05 15:13:53,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509781801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:53,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409143595] [2021-06-05 15:13:53,909 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 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 15:13:53,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:53,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:53,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:53,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:54,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:54,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:54,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:54,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:54,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:54,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:13:54,395 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 15:13:54,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409143595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:54,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:54,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:13:54,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072015641] [2021-06-05 15:13:54,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:13:54,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:54,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:13:54,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:13:54,396 INFO L87 Difference]: Start difference. First operand 10533 states and 47746 transitions. Second operand has 25 states, 25 states have (on average 2.04) 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 15:13:55,505 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 15:13:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:57,454 INFO L93 Difference]: Finished difference Result 12121 states and 54001 transitions. [2021-06-05 15:13:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:13:57,454 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) 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 33 [2021-06-05 15:13:57,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:57,482 INFO L225 Difference]: With dead ends: 12121 [2021-06-05 15:13:57,483 INFO L226 Difference]: Without dead ends: 12059 [2021-06-05 15:13:57,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 2590.9ms TimeCoverageRelationStatistics Valid=383, Invalid=2587, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:13:57,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12059 states. [2021-06-05 15:13:57,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12059 to 10754. [2021-06-05 15:13:57,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10754 states, 10753 states have (on average 4.5405003254905605) internal successors, (48824), 10753 states have internal predecessors, (48824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:57,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10754 states to 10754 states and 48824 transitions. [2021-06-05 15:13:57,744 INFO L78 Accepts]: Start accepts. Automaton has 10754 states and 48824 transitions. Word has length 33 [2021-06-05 15:13:57,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:57,744 INFO L482 AbstractCegarLoop]: Abstraction has 10754 states and 48824 transitions. [2021-06-05 15:13:57,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) 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 15:13:57,744 INFO L276 IsEmpty]: Start isEmpty. Operand 10754 states and 48824 transitions. [2021-06-05 15:13:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:13:57,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:57,761 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, 1, 1, 1] [2021-06-05 15:13:57,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:57,962 INFO L430 AbstractCegarLoop]: === Iteration 324 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:57,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:57,962 INFO L82 PathProgramCache]: Analyzing trace with hash 612262930, now seen corresponding path program 243 times [2021-06-05 15:13:57,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:57,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712597366] [2021-06-05 15:13:57,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:58,177 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 15:13:58,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:58,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712597366] [2021-06-05 15:13:58,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712597366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:58,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803050249] [2021-06-05 15:13:58,178 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 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 15:13:58,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:13:58,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:58,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:13:58,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:58,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:58,380 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:13:58,381 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 29 treesize of output 57 [2021-06-05 15:13:58,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:58,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:58,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:58,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 15:13:58,573 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 15:13:58,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803050249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:58,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:58,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:13:58,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457343211] [2021-06-05 15:13:58,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:13:58,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:58,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:13:58,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:13:58,574 INFO L87 Difference]: Start difference. First operand 10754 states and 48824 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:00,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:00,388 INFO L93 Difference]: Finished difference Result 11893 states and 53164 transitions. [2021-06-05 15:14:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:14:00,388 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:14:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:00,416 INFO L225 Difference]: With dead ends: 11893 [2021-06-05 15:14:00,416 INFO L226 Difference]: Without dead ends: 11875 [2021-06-05 15:14:00,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1525.1ms TimeCoverageRelationStatistics Valid=416, Invalid=2664, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:14:00,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11875 states. [2021-06-05 15:14:00,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11875 to 10754. [2021-06-05 15:14:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10754 states, 10753 states have (on average 4.5405003254905605) internal successors, (48824), 10753 states have internal predecessors, (48824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:00,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10754 states to 10754 states and 48824 transitions. [2021-06-05 15:14:00,622 INFO L78 Accepts]: Start accepts. Automaton has 10754 states and 48824 transitions. Word has length 33 [2021-06-05 15:14:00,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:00,622 INFO L482 AbstractCegarLoop]: Abstraction has 10754 states and 48824 transitions. [2021-06-05 15:14:00,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:00,623 INFO L276 IsEmpty]: Start isEmpty. Operand 10754 states and 48824 transitions. [2021-06-05 15:14:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:00,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:00,641 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, 1, 1, 1] [2021-06-05 15:14:00,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 15:14:00,841 INFO L430 AbstractCegarLoop]: === Iteration 325 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:00,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:00,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1056130512, now seen corresponding path program 244 times [2021-06-05 15:14:00,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:00,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566532196] [2021-06-05 15:14:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:01,060 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 15:14:01,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:01,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566532196] [2021-06-05 15:14:01,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566532196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:01,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354483815] [2021-06-05 15:14:01,060 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 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 15:14:01,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:01,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:01,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:01,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:01,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:01,198 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 29 treesize of output 13 [2021-06-05 15:14:01,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:01,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:01,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:01,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:14:01,294 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 15:14:01,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354483815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:01,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:01,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:14:01,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577280786] [2021-06-05 15:14:01,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:01,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:01,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:01,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:01,295 INFO L87 Difference]: Start difference. First operand 10754 states and 48824 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 15:14:01,683 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 15:14:03,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:03,024 INFO L93 Difference]: Finished difference Result 12189 states and 54296 transitions. [2021-06-05 15:14:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:14:03,024 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 33 [2021-06-05 15:14:03,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:03,052 INFO L225 Difference]: With dead ends: 12189 [2021-06-05 15:14:03,052 INFO L226 Difference]: Without dead ends: 12161 [2021-06-05 15:14:03,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1251.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:14:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12161 states. [2021-06-05 15:14:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12161 to 10842. [2021-06-05 15:14:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10842 states, 10841 states have (on average 4.539525873996864) internal successors, (49213), 10841 states have internal predecessors, (49213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:03,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10842 states to 10842 states and 49213 transitions. [2021-06-05 15:14:03,249 INFO L78 Accepts]: Start accepts. Automaton has 10842 states and 49213 transitions. Word has length 33 [2021-06-05 15:14:03,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:03,250 INFO L482 AbstractCegarLoop]: Abstraction has 10842 states and 49213 transitions. [2021-06-05 15:14:03,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 15:14:03,250 INFO L276 IsEmpty]: Start isEmpty. Operand 10842 states and 49213 transitions. [2021-06-05 15:14:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:03,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:03,267 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, 1, 1, 1] [2021-06-05 15:14:03,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:03,468 INFO L430 AbstractCegarLoop]: === Iteration 326 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:03,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:03,468 INFO L82 PathProgramCache]: Analyzing trace with hash -287099142, now seen corresponding path program 245 times [2021-06-05 15:14:03,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:03,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028454734] [2021-06-05 15:14:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:03,668 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 15:14:03,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:03,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028454734] [2021-06-05 15:14:03,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028454734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:03,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338096993] [2021-06-05 15:14:03,668 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 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 15:14:03,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:14:03,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:03,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:03,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:03,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:14:03,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:03,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:03,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:14:03,819 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 34 treesize of output 16 [2021-06-05 15:14:03,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:03,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:03,829 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 15:14:03,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:16 [2021-06-05 15:14:03,934 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 15:14:03,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338096993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:03,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:03,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:14:03,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888055840] [2021-06-05 15:14:03,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:03,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:03,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:03,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:03,935 INFO L87 Difference]: Start difference. First operand 10842 states and 49213 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:05,368 INFO L93 Difference]: Finished difference Result 12229 states and 54380 transitions. [2021-06-05 15:14:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:14:05,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:14:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:05,396 INFO L225 Difference]: With dead ends: 12229 [2021-06-05 15:14:05,396 INFO L226 Difference]: Without dead ends: 12178 [2021-06-05 15:14:05,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1100.8ms TimeCoverageRelationStatistics Valid=301, Invalid=1679, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:14:05,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12178 states. [2021-06-05 15:14:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12178 to 10916. [2021-06-05 15:14:05,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10916 states, 10915 states have (on average 4.536601007787448) internal successors, (49517), 10915 states have internal predecessors, (49517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:05,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10916 states to 10916 states and 49517 transitions. [2021-06-05 15:14:05,607 INFO L78 Accepts]: Start accepts. Automaton has 10916 states and 49517 transitions. Word has length 33 [2021-06-05 15:14:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:05,607 INFO L482 AbstractCegarLoop]: Abstraction has 10916 states and 49517 transitions. [2021-06-05 15:14:05,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 10916 states and 49517 transitions. [2021-06-05 15:14:05,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:05,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:05,626 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, 1, 1, 1] [2021-06-05 15:14:05,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 15:14:05,826 INFO L430 AbstractCegarLoop]: === Iteration 327 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:05,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:05,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1673261790, now seen corresponding path program 246 times [2021-06-05 15:14:05,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:05,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114660564] [2021-06-05 15:14:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:06,021 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 15:14:06,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:06,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114660564] [2021-06-05 15:14:06,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114660564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:06,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023624081] [2021-06-05 15:14:06,022 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 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 15:14:06,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:14:06,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:06,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:06,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:06,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:06,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 40 [2021-06-05 15:14:06,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:06,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:06,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:06,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:37 [2021-06-05 15:14:06,500 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 15:14:06,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023624081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:06,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:06,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:14:06,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791909007] [2021-06-05 15:14:06,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:14:06,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:06,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:14:06,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:14:06,501 INFO L87 Difference]: Start difference. First operand 10916 states and 49517 transitions. Second operand has 25 states, 25 states have (on average 2.04) 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 15:14:06,694 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 15:14:07,154 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2021-06-05 15:14:07,488 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2021-06-05 15:14:07,638 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-06-05 15:14:07,796 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 15:14:08,129 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 15:14:09,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:09,791 INFO L93 Difference]: Finished difference Result 11810 states and 53277 transitions. [2021-06-05 15:14:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:14:09,791 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) 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 33 [2021-06-05 15:14:09,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:09,820 INFO L225 Difference]: With dead ends: 11810 [2021-06-05 15:14:09,820 INFO L226 Difference]: Without dead ends: 11781 [2021-06-05 15:14:09,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 2874.5ms TimeCoverageRelationStatistics Valid=435, Invalid=2757, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:14:09,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11781 states. [2021-06-05 15:14:09,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11781 to 10901. [2021-06-05 15:14:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10901 states, 10900 states have (on average 4.53743119266055) internal successors, (49458), 10900 states have internal predecessors, (49458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:10,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10901 states to 10901 states and 49458 transitions. [2021-06-05 15:14:10,008 INFO L78 Accepts]: Start accepts. Automaton has 10901 states and 49458 transitions. Word has length 33 [2021-06-05 15:14:10,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:10,008 INFO L482 AbstractCegarLoop]: Abstraction has 10901 states and 49458 transitions. [2021-06-05 15:14:10,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) 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 15:14:10,008 INFO L276 IsEmpty]: Start isEmpty. Operand 10901 states and 49458 transitions. [2021-06-05 15:14:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:10,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:10,026 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, 1, 1, 1] [2021-06-05 15:14:10,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-05 15:14:10,226 INFO L430 AbstractCegarLoop]: === Iteration 328 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:10,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:10,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1572933104, now seen corresponding path program 247 times [2021-06-05 15:14:10,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:10,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492692083] [2021-06-05 15:14:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:10,439 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 15:14:10,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:10,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492692083] [2021-06-05 15:14:10,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492692083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:10,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747506252] [2021-06-05 15:14:10,440 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 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 15:14:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:10,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:10,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:10,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:10,581 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 29 treesize of output 13 [2021-06-05 15:14:10,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:10,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:10,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:10,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:14:10,678 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 15:14:10,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747506252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:10,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:10,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:14:10,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584011748] [2021-06-05 15:14:10,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:10,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:10,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:10,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:10,679 INFO L87 Difference]: Start difference. First operand 10901 states and 49458 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:14:11,204 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 15:14:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:12,633 INFO L93 Difference]: Finished difference Result 12630 states and 56063 transitions. [2021-06-05 15:14:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:14:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 15:14:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:12,664 INFO L225 Difference]: With dead ends: 12630 [2021-06-05 15:14:12,664 INFO L226 Difference]: Without dead ends: 12580 [2021-06-05 15:14:12,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1559.7ms TimeCoverageRelationStatistics Valid=351, Invalid=2199, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:14:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12580 states. [2021-06-05 15:14:12,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12580 to 11090. [2021-06-05 15:14:12,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11090 states, 11089 states have (on average 4.534764180719632) internal successors, (50286), 11089 states have internal predecessors, (50286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11090 states to 11090 states and 50286 transitions. [2021-06-05 15:14:12,866 INFO L78 Accepts]: Start accepts. Automaton has 11090 states and 50286 transitions. Word has length 33 [2021-06-05 15:14:12,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:12,866 INFO L482 AbstractCegarLoop]: Abstraction has 11090 states and 50286 transitions. [2021-06-05 15:14:12,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:14:12,867 INFO L276 IsEmpty]: Start isEmpty. Operand 11090 states and 50286 transitions. [2021-06-05 15:14:12,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:12,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:12,885 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, 1, 1, 1] [2021-06-05 15:14:13,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-05 15:14:13,086 INFO L430 AbstractCegarLoop]: === Iteration 329 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:13,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:13,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1418761586, now seen corresponding path program 248 times [2021-06-05 15:14:13,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:13,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774354901] [2021-06-05 15:14:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:13,299 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 15:14:13,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:13,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774354901] [2021-06-05 15:14:13,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774354901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:13,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464221698] [2021-06-05 15:14:13,299 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 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 15:14:13,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:13,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:13,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:13,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:13,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:13,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:13,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:13,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:13,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:13,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:14:13,690 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 15:14:13,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464221698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:13,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:13,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:14:13,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828464151] [2021-06-05 15:14:13,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:14:13,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:13,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:14:13,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:14:13,691 INFO L87 Difference]: Start difference. First operand 11090 states and 50286 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) 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 15:14:16,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:16,538 INFO L93 Difference]: Finished difference Result 12738 states and 56267 transitions. [2021-06-05 15:14:16,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:14:16,539 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) 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 33 [2021-06-05 15:14:16,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:16,570 INFO L225 Difference]: With dead ends: 12738 [2021-06-05 15:14:16,570 INFO L226 Difference]: Without dead ends: 12716 [2021-06-05 15:14:16,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 2335.3ms TimeCoverageRelationStatistics Valid=496, Invalid=2926, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:14:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12716 states. [2021-06-05 15:14:16,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12716 to 11147. [2021-06-05 15:14:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11147 states, 11146 states have (on average 4.537771397810874) internal successors, (50578), 11146 states have internal predecessors, (50578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:16,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11147 states to 11147 states and 50578 transitions. [2021-06-05 15:14:16,788 INFO L78 Accepts]: Start accepts. Automaton has 11147 states and 50578 transitions. Word has length 33 [2021-06-05 15:14:16,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:16,788 INFO L482 AbstractCegarLoop]: Abstraction has 11147 states and 50578 transitions. [2021-06-05 15:14:16,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) 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 15:14:16,788 INFO L276 IsEmpty]: Start isEmpty. Operand 11147 states and 50578 transitions. [2021-06-05 15:14:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:16,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:16,806 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, 1, 1, 1] [2021-06-05 15:14:17,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-05 15:14:17,007 INFO L430 AbstractCegarLoop]: === Iteration 330 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:17,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:17,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1976843638, now seen corresponding path program 249 times [2021-06-05 15:14:17,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:17,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754511281] [2021-06-05 15:14:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:17,263 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 15:14:17,301 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 15:14:17,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:17,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754511281] [2021-06-05 15:14:17,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754511281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:17,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579384693] [2021-06-05 15:14:17,302 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 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 15:14:17,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:14:17,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:17,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:17,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:17,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:17,504 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:14:17,504 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-05 15:14:17,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:17,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:17,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:17,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-06-05 15:14:17,701 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 15:14:17,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579384693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:17,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:17,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-06-05 15:14:17,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414424032] [2021-06-05 15:14:17,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:14:17,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:17,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:14:17,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:14:17,702 INFO L87 Difference]: Start difference. First operand 11147 states and 50578 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:20,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:20,032 INFO L93 Difference]: Finished difference Result 12293 states and 54875 transitions. [2021-06-05 15:14:20,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:14:20,032 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:14:20,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:20,060 INFO L225 Difference]: With dead ends: 12293 [2021-06-05 15:14:20,061 INFO L226 Difference]: Without dead ends: 12247 [2021-06-05 15:14:20,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2013.4ms TimeCoverageRelationStatistics Valid=511, Invalid=3395, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:14:20,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12247 states. [2021-06-05 15:14:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12247 to 11199. [2021-06-05 15:14:20,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11199 states, 11198 states have (on average 4.534023932845151) internal successors, (50772), 11198 states have internal predecessors, (50772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11199 states to 11199 states and 50772 transitions. [2021-06-05 15:14:20,261 INFO L78 Accepts]: Start accepts. Automaton has 11199 states and 50772 transitions. Word has length 33 [2021-06-05 15:14:20,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:20,261 INFO L482 AbstractCegarLoop]: Abstraction has 11199 states and 50772 transitions. [2021-06-05 15:14:20,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:20,262 INFO L276 IsEmpty]: Start isEmpty. Operand 11199 states and 50772 transitions. [2021-06-05 15:14:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:20,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:20,280 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, 1, 1, 1] [2021-06-05 15:14:20,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:20,480 INFO L430 AbstractCegarLoop]: === Iteration 331 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:20,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:20,480 INFO L82 PathProgramCache]: Analyzing trace with hash 196245336, now seen corresponding path program 250 times [2021-06-05 15:14:20,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:20,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883208601] [2021-06-05 15:14:20,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:20,681 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 15:14:20,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:20,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883208601] [2021-06-05 15:14:20,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883208601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:20,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584807204] [2021-06-05 15:14:20,681 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 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 15:14:20,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:20,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:20,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:20,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:20,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:14:20,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:20,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:20,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:14:20,833 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 34 treesize of output 16 [2021-06-05 15:14:20,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:20,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:20,843 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 15:14:20,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:16 [2021-06-05 15:14:20,963 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 15:14:20,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584807204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:20,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:20,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:14:20,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029076806] [2021-06-05 15:14:20,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:20,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:20,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:20,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:20,964 INFO L87 Difference]: Start difference. First operand 11199 states and 50772 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:22,021 INFO L93 Difference]: Finished difference Result 12416 states and 55289 transitions. [2021-06-05 15:14:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:14:22,021 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:14:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:22,053 INFO L225 Difference]: With dead ends: 12416 [2021-06-05 15:14:22,053 INFO L226 Difference]: Without dead ends: 12382 [2021-06-05 15:14:22,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 849.3ms TimeCoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:14:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12382 states. [2021-06-05 15:14:22,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12382 to 11115. [2021-06-05 15:14:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11115 states, 11114 states have (on average 4.535090876372143) internal successors, (50403), 11114 states have internal predecessors, (50403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11115 states to 11115 states and 50403 transitions. [2021-06-05 15:14:22,311 INFO L78 Accepts]: Start accepts. Automaton has 11115 states and 50403 transitions. Word has length 33 [2021-06-05 15:14:22,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:22,311 INFO L482 AbstractCegarLoop]: Abstraction has 11115 states and 50403 transitions. [2021-06-05 15:14:22,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:22,311 INFO L276 IsEmpty]: Start isEmpty. Operand 11115 states and 50403 transitions. [2021-06-05 15:14:22,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:22,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:22,328 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, 1, 1, 1] [2021-06-05 15:14:22,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 15:14:22,545 INFO L430 AbstractCegarLoop]: === Iteration 332 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:22,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:22,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2092165424, now seen corresponding path program 251 times [2021-06-05 15:14:22,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:22,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164214617] [2021-06-05 15:14:22,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:22,756 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 15:14:22,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:22,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164214617] [2021-06-05 15:14:22,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164214617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:22,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674693993] [2021-06-05 15:14:22,756 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 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 15:14:22,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:14:22,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:22,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:22,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:22,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:22,937 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 29 treesize of output 13 [2021-06-05 15:14:22,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:22,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:22,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:22,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 15:14:23,060 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 15:14:23,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674693993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:23,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:23,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:14:23,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025247478] [2021-06-05 15:14:23,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:23,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:23,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:23,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:23,061 INFO L87 Difference]: Start difference. First operand 11115 states and 50403 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:14:23,616 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 15:14:24,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:24,752 INFO L93 Difference]: Finished difference Result 11817 states and 53157 transitions. [2021-06-05 15:14:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:14:24,752 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 15:14:24,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:24,780 INFO L225 Difference]: With dead ends: 11817 [2021-06-05 15:14:24,780 INFO L226 Difference]: Without dead ends: 11798 [2021-06-05 15:14:24,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1345.4ms TimeCoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:14:24,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11798 states. [2021-06-05 15:14:24,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11798 to 11112. [2021-06-05 15:14:24,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11112 states, 11111 states have (on average 4.535415354153542) internal successors, (50393), 11111 states have internal predecessors, (50393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:24,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11112 states to 11112 states and 50393 transitions. [2021-06-05 15:14:24,969 INFO L78 Accepts]: Start accepts. Automaton has 11112 states and 50393 transitions. Word has length 33 [2021-06-05 15:14:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:24,969 INFO L482 AbstractCegarLoop]: Abstraction has 11112 states and 50393 transitions. [2021-06-05 15:14:24,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:14:24,970 INFO L276 IsEmpty]: Start isEmpty. Operand 11112 states and 50393 transitions. [2021-06-05 15:14:24,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:24,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:24,988 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, 1, 1, 1] [2021-06-05 15:14:25,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 15:14:25,188 INFO L430 AbstractCegarLoop]: === Iteration 333 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:25,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash -578352842, now seen corresponding path program 252 times [2021-06-05 15:14:25,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:25,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709436599] [2021-06-05 15:14:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:25,421 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 15:14:25,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:25,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709436599] [2021-06-05 15:14:25,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709436599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:25,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974820799] [2021-06-05 15:14:25,421 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 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 15:14:25,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:14:25,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:25,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:14:25,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:25,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:25,642 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:14:25,642 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 27 treesize of output 55 [2021-06-05 15:14:25,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:14:25,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:25,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:25,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:27 [2021-06-05 15:14:25,775 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 15:14:25,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974820799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:25,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:25,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:14:25,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745570261] [2021-06-05 15:14:25,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:14:25,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:25,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:14:25,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:14:25,776 INFO L87 Difference]: Start difference. First operand 11112 states and 50393 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:27,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:27,795 INFO L93 Difference]: Finished difference Result 12162 states and 53991 transitions. [2021-06-05 15:14:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:14:27,795 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:14:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:27,823 INFO L225 Difference]: With dead ends: 12162 [2021-06-05 15:14:27,823 INFO L226 Difference]: Without dead ends: 12144 [2021-06-05 15:14:27,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1576.3ms TimeCoverageRelationStatistics Valid=307, Invalid=2045, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:14:27,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12144 states. [2021-06-05 15:14:27,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12144 to 11099. [2021-06-05 15:14:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11099 states, 11098 states have (on average 4.537033699765724) internal successors, (50352), 11098 states have internal predecessors, (50352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11099 states to 11099 states and 50352 transitions. [2021-06-05 15:14:28,011 INFO L78 Accepts]: Start accepts. Automaton has 11099 states and 50352 transitions. Word has length 33 [2021-06-05 15:14:28,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:28,011 INFO L482 AbstractCegarLoop]: Abstraction has 11099 states and 50352 transitions. [2021-06-05 15:14:28,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 11099 states and 50352 transitions. [2021-06-05 15:14:28,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:28,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:28,029 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, 1, 1, 1] [2021-06-05 15:14:28,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable515 [2021-06-05 15:14:28,230 INFO L430 AbstractCegarLoop]: === Iteration 334 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:28,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:28,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1589919774, now seen corresponding path program 253 times [2021-06-05 15:14:28,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:28,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434907566] [2021-06-05 15:14:28,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:28,389 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 15:14:28,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:28,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434907566] [2021-06-05 15:14:28,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434907566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:28,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591908466] [2021-06-05 15:14:28,390 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 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 15:14:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:28,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:28,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:28,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:28,567 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 28 treesize of output 12 [2021-06-05 15:14:28,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:28,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:28,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:28,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:15 [2021-06-05 15:14:28,655 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 15:14:28,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591908466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:28,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:28,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:14:28,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069547107] [2021-06-05 15:14:28,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:28,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:28,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:28,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:28,656 INFO L87 Difference]: Start difference. First operand 11099 states and 50352 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:14:29,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:29,924 INFO L93 Difference]: Finished difference Result 11811 states and 53056 transitions. [2021-06-05 15:14:29,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:14:29,925 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:14:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:29,952 INFO L225 Difference]: With dead ends: 11811 [2021-06-05 15:14:29,952 INFO L226 Difference]: Without dead ends: 11788 [2021-06-05 15:14:29,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 977.2ms TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:14:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11788 states. [2021-06-05 15:14:30,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11788 to 11111. [2021-06-05 15:14:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11111 states, 11110 states have (on average 4.535373537353736) internal successors, (50388), 11110 states have internal predecessors, (50388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:30,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11111 states to 11111 states and 50388 transitions. [2021-06-05 15:14:30,150 INFO L78 Accepts]: Start accepts. Automaton has 11111 states and 50388 transitions. Word has length 33 [2021-06-05 15:14:30,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:30,150 INFO L482 AbstractCegarLoop]: Abstraction has 11111 states and 50388 transitions. [2021-06-05 15:14:30,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:14:30,150 INFO L276 IsEmpty]: Start isEmpty. Operand 11111 states and 50388 transitions. [2021-06-05 15:14:30,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:30,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:30,169 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, 1, 1, 1] [2021-06-05 15:14:30,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:30,370 INFO L430 AbstractCegarLoop]: === Iteration 335 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:30,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:30,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1036654080, now seen corresponding path program 254 times [2021-06-05 15:14:30,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:30,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071274574] [2021-06-05 15:14:30,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:30,530 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 15:14:30,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:30,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071274574] [2021-06-05 15:14:30,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071274574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:30,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829625576] [2021-06-05 15:14:30,531 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 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 15:14:30,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:30,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:30,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:14:30,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:30,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:30,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:14:30,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:30,721 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 22 treesize of output 30 [2021-06-05 15:14:30,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:30,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:30,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:30,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:32 [2021-06-05 15:14:30,862 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 15:14:30,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829625576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:30,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:30,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:14:30,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444605631] [2021-06-05 15:14:30,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:14:30,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:30,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:14:30,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:14:30,863 INFO L87 Difference]: Start difference. First operand 11111 states and 50388 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:32,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:32,038 INFO L93 Difference]: Finished difference Result 11740 states and 52764 transitions. [2021-06-05 15:14:32,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:14:32,039 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:14:32,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:32,066 INFO L225 Difference]: With dead ends: 11740 [2021-06-05 15:14:32,066 INFO L226 Difference]: Without dead ends: 11689 [2021-06-05 15:14:32,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 807.7ms TimeCoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:14:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11689 states. [2021-06-05 15:14:32,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11689 to 11062. [2021-06-05 15:14:32,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11062 states, 11061 states have (on average 4.536479522647139) internal successors, (50178), 11061 states have internal predecessors, (50178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11062 states to 11062 states and 50178 transitions. [2021-06-05 15:14:32,255 INFO L78 Accepts]: Start accepts. Automaton has 11062 states and 50178 transitions. Word has length 33 [2021-06-05 15:14:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:32,255 INFO L482 AbstractCegarLoop]: Abstraction has 11062 states and 50178 transitions. [2021-06-05 15:14:32,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:32,255 INFO L276 IsEmpty]: Start isEmpty. Operand 11062 states and 50178 transitions. [2021-06-05 15:14:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:32,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:32,273 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, 1, 1, 1] [2021-06-05 15:14:32,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-05 15:14:32,474 INFO L430 AbstractCegarLoop]: === Iteration 336 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:32,474 INFO L82 PathProgramCache]: Analyzing trace with hash 889108678, now seen corresponding path program 255 times [2021-06-05 15:14:32,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:32,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067335102] [2021-06-05 15:14:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:32,633 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 15:14:32,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:32,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067335102] [2021-06-05 15:14:32,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067335102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:32,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366615169] [2021-06-05 15:14:32,633 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 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 15:14:32,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:14:32,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:32,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:32,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:32,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:32,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:14:32,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:32,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:32,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:32,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 15:14:32,984 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 15:14:32,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366615169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:32,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:32,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:14:32,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549578252] [2021-06-05 15:14:32,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:14:32,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:32,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:14:32,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:14:32,985 INFO L87 Difference]: Start difference. First operand 11062 states and 50178 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:34,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:34,341 INFO L93 Difference]: Finished difference Result 11625 states and 52377 transitions. [2021-06-05 15:14:34,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:14:34,341 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:14:34,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:34,369 INFO L225 Difference]: With dead ends: 11625 [2021-06-05 15:14:34,369 INFO L226 Difference]: Without dead ends: 11595 [2021-06-05 15:14:34,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1078.2ms TimeCoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:14:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11595 states. [2021-06-05 15:14:34,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11595 to 11041. [2021-06-05 15:14:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11041 states, 11040 states have (on average 4.536322463768116) internal successors, (50081), 11040 states have internal predecessors, (50081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11041 states to 11041 states and 50081 transitions. [2021-06-05 15:14:34,566 INFO L78 Accepts]: Start accepts. Automaton has 11041 states and 50081 transitions. Word has length 33 [2021-06-05 15:14:34,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:34,566 INFO L482 AbstractCegarLoop]: Abstraction has 11041 states and 50081 transitions. [2021-06-05 15:14:34,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 11041 states and 50081 transitions. [2021-06-05 15:14:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:34,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:34,585 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, 1, 1, 1] [2021-06-05 15:14:34,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-05 15:14:34,785 INFO L430 AbstractCegarLoop]: === Iteration 337 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:34,786 INFO L82 PathProgramCache]: Analyzing trace with hash -896373506, now seen corresponding path program 256 times [2021-06-05 15:14:34,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:34,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630598123] [2021-06-05 15:14:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:34,946 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 15:14:34,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:34,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630598123] [2021-06-05 15:14:34,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630598123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:34,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755248467] [2021-06-05 15:14:34,946 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 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 15:14:34,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:34,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:34,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:34,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:35,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:35,132 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 28 treesize of output 12 [2021-06-05 15:14:35,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:35,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:35,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:35,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:15 [2021-06-05 15:14:35,201 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 15:14:35,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755248467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:35,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:35,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:14:35,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944739374] [2021-06-05 15:14:35,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:35,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:35,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:35,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:35,202 INFO L87 Difference]: Start difference. First operand 11041 states and 50081 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 15:14:36,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:36,224 INFO L93 Difference]: Finished difference Result 11693 states and 52622 transitions. [2021-06-05 15:14:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:14:36,224 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 33 [2021-06-05 15:14:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:36,253 INFO L225 Difference]: With dead ends: 11693 [2021-06-05 15:14:36,253 INFO L226 Difference]: Without dead ends: 11664 [2021-06-05 15:14:36,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 815.6ms TimeCoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:14:36,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11664 states. [2021-06-05 15:14:36,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11664 to 11028. [2021-06-05 15:14:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11028 states, 11027 states have (on average 4.535775822979958) internal successors, (50016), 11027 states have internal predecessors, (50016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11028 states to 11028 states and 50016 transitions. [2021-06-05 15:14:36,516 INFO L78 Accepts]: Start accepts. Automaton has 11028 states and 50016 transitions. Word has length 33 [2021-06-05 15:14:36,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:36,516 INFO L482 AbstractCegarLoop]: Abstraction has 11028 states and 50016 transitions. [2021-06-05 15:14:36,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 15:14:36,516 INFO L276 IsEmpty]: Start isEmpty. Operand 11028 states and 50016 transitions. [2021-06-05 15:14:36,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:36,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:36,534 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, 1, 1, 1] [2021-06-05 15:14:36,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-05 15:14:36,735 INFO L430 AbstractCegarLoop]: === Iteration 338 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:36,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:36,735 INFO L82 PathProgramCache]: Analyzing trace with hash -60240186, now seen corresponding path program 257 times [2021-06-05 15:14:36,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:36,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579431702] [2021-06-05 15:14:36,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:36,902 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 15:14:36,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:36,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579431702] [2021-06-05 15:14:36,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579431702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:36,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166260027] [2021-06-05 15:14:36,902 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 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 15:14:36,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:14:36,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:36,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:36,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:37,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:37,095 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 28 treesize of output 12 [2021-06-05 15:14:37,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:37,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:37,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:37,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:15 [2021-06-05 15:14:37,187 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 15:14:37,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166260027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:37,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:37,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:14:37,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576368940] [2021-06-05 15:14:37,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:37,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:37,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:37,188 INFO L87 Difference]: Start difference. First operand 11028 states and 50016 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:14:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:38,569 INFO L93 Difference]: Finished difference Result 11531 states and 52041 transitions. [2021-06-05 15:14:38,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:14:38,569 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:14:38,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:38,597 INFO L225 Difference]: With dead ends: 11531 [2021-06-05 15:14:38,597 INFO L226 Difference]: Without dead ends: 11489 [2021-06-05 15:14:38,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1097.0ms TimeCoverageRelationStatistics Valid=237, Invalid=1743, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:14:38,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11489 states. [2021-06-05 15:14:38,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11489 to 11014. [2021-06-05 15:14:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11014 states, 11013 states have (on average 4.537455734132389) internal successors, (49971), 11013 states have internal predecessors, (49971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11014 states to 11014 states and 49971 transitions. [2021-06-05 15:14:38,797 INFO L78 Accepts]: Start accepts. Automaton has 11014 states and 49971 transitions. Word has length 33 [2021-06-05 15:14:38,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:38,797 INFO L482 AbstractCegarLoop]: Abstraction has 11014 states and 49971 transitions. [2021-06-05 15:14:38,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:14:38,797 INFO L276 IsEmpty]: Start isEmpty. Operand 11014 states and 49971 transitions. [2021-06-05 15:14:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:38,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:38,816 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, 1, 1, 1] [2021-06-05 15:14:39,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:39,016 INFO L430 AbstractCegarLoop]: === Iteration 339 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:39,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2112639498, now seen corresponding path program 258 times [2021-06-05 15:14:39,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:39,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464603353] [2021-06-05 15:14:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:39,226 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 15:14:39,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:39,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464603353] [2021-06-05 15:14:39,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464603353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:39,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224068221] [2021-06-05 15:14:39,227 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 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 15:14:39,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:14:39,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:39,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:14:39,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:39,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:39,452 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:14:39,453 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 27 treesize of output 55 [2021-06-05 15:14:39,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:14:39,482 INFO L628 ElimStorePlain]: treesize reduction 67, result has 28.7 percent of original size [2021-06-05 15:14:39,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:39,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:27 [2021-06-05 15:14:39,607 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 15:14:39,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224068221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:39,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:39,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:14:39,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350297352] [2021-06-05 15:14:39,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:14:39,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:39,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:14:39,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:14:39,608 INFO L87 Difference]: Start difference. First operand 11014 states and 49971 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:41,447 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 15:14:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:42,199 INFO L93 Difference]: Finished difference Result 12819 states and 56045 transitions. [2021-06-05 15:14:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:14:42,199 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:14:42,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:42,229 INFO L225 Difference]: With dead ends: 12819 [2021-06-05 15:14:42,229 INFO L226 Difference]: Without dead ends: 12757 [2021-06-05 15:14:42,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 2257.9ms TimeCoverageRelationStatistics Valid=434, Invalid=3106, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:14:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12757 states. [2021-06-05 15:14:42,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12757 to 11029. [2021-06-05 15:14:42,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11029 states, 11028 states have (on average 4.541530649256438) internal successors, (50084), 11028 states have internal predecessors, (50084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11029 states to 11029 states and 50084 transitions. [2021-06-05 15:14:42,430 INFO L78 Accepts]: Start accepts. Automaton has 11029 states and 50084 transitions. Word has length 33 [2021-06-05 15:14:42,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:42,431 INFO L482 AbstractCegarLoop]: Abstraction has 11029 states and 50084 transitions. [2021-06-05 15:14:42,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:42,431 INFO L276 IsEmpty]: Start isEmpty. Operand 11029 states and 50084 transitions. [2021-06-05 15:14:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:42,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:42,449 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, 1, 1, 1] [2021-06-05 15:14:42,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 15:14:42,649 INFO L430 AbstractCegarLoop]: === Iteration 340 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:42,649 INFO L82 PathProgramCache]: Analyzing trace with hash -809366892, now seen corresponding path program 259 times [2021-06-05 15:14:42,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:42,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594875909] [2021-06-05 15:14:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:42,864 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 15:14:42,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:42,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594875909] [2021-06-05 15:14:42,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594875909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:42,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998733118] [2021-06-05 15:14:42,864 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 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 15:14:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:42,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:42,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:43,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:43,038 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 28 treesize of output 12 [2021-06-05 15:14:43,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:43,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:43,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:43,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:15 [2021-06-05 15:14:43,124 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 15:14:43,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998733118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:43,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:43,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:14:43,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606673170] [2021-06-05 15:14:43,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:43,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:43,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:43,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:43,125 INFO L87 Difference]: Start difference. First operand 11029 states and 50084 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:14:45,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:45,298 INFO L93 Difference]: Finished difference Result 12551 states and 55893 transitions. [2021-06-05 15:14:45,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:14:45,298 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:14:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:45,330 INFO L225 Difference]: With dead ends: 12551 [2021-06-05 15:14:45,330 INFO L226 Difference]: Without dead ends: 12519 [2021-06-05 15:14:45,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1822.5ms TimeCoverageRelationStatistics Valid=469, Invalid=2953, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:14:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12519 states. [2021-06-05 15:14:45,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12519 to 11154. [2021-06-05 15:14:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11154 states, 11153 states have (on average 4.535640634806779) internal successors, (50586), 11153 states have internal predecessors, (50586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11154 states to 11154 states and 50586 transitions. [2021-06-05 15:14:45,555 INFO L78 Accepts]: Start accepts. Automaton has 11154 states and 50586 transitions. Word has length 33 [2021-06-05 15:14:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:45,555 INFO L482 AbstractCegarLoop]: Abstraction has 11154 states and 50586 transitions. [2021-06-05 15:14:45,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:14:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 11154 states and 50586 transitions. [2021-06-05 15:14:45,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:45,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:45,574 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, 1, 1, 1] [2021-06-05 15:14:45,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-06-05 15:14:45,775 INFO L430 AbstractCegarLoop]: === Iteration 341 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:45,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:45,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1817206962, now seen corresponding path program 260 times [2021-06-05 15:14:45,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:45,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366919318] [2021-06-05 15:14:45,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:45,984 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 15:14:45,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:45,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366919318] [2021-06-05 15:14:45,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366919318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:45,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129630545] [2021-06-05 15:14:45,985 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 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 15:14:46,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:46,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:46,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:14:46,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:46,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:46,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:14:46,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:46,259 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 22 treesize of output 30 [2021-06-05 15:14:46,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:46,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:46,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:46,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:34 [2021-06-05 15:14:46,403 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 15:14:46,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129630545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:46,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:46,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:14:46,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251121175] [2021-06-05 15:14:46,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:14:46,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:46,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:14:46,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:14:46,404 INFO L87 Difference]: Start difference. First operand 11154 states and 50586 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:49,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:49,095 INFO L93 Difference]: Finished difference Result 13559 states and 58758 transitions. [2021-06-05 15:14:49,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:14:49,095 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:14:49,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:49,128 INFO L225 Difference]: With dead ends: 13559 [2021-06-05 15:14:49,129 INFO L226 Difference]: Without dead ends: 13523 [2021-06-05 15:14:49,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2155.9ms TimeCoverageRelationStatistics Valid=474, Invalid=3186, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:14:49,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13523 states. [2021-06-05 15:14:49,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13523 to 11208. [2021-06-05 15:14:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11208 states, 11207 states have (on average 4.5342196841259925) internal successors, (50815), 11207 states have internal predecessors, (50815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11208 states to 11208 states and 50815 transitions. [2021-06-05 15:14:49,358 INFO L78 Accepts]: Start accepts. Automaton has 11208 states and 50815 transitions. Word has length 33 [2021-06-05 15:14:49,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:49,358 INFO L482 AbstractCegarLoop]: Abstraction has 11208 states and 50815 transitions. [2021-06-05 15:14:49,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:49,359 INFO L276 IsEmpty]: Start isEmpty. Operand 11208 states and 50815 transitions. [2021-06-05 15:14:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:49,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:49,378 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, 1, 1, 1] [2021-06-05 15:14:49,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-05 15:14:49,578 INFO L430 AbstractCegarLoop]: === Iteration 342 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:49,579 INFO L82 PathProgramCache]: Analyzing trace with hash -862753412, now seen corresponding path program 261 times [2021-06-05 15:14:49,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:49,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554887669] [2021-06-05 15:14:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:49,740 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 15:14:49,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:49,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554887669] [2021-06-05 15:14:49,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554887669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:49,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045735735] [2021-06-05 15:14:49,741 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 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 15:14:49,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:14:49,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:49,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:49,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:49,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:49,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:14:49,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:49,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:49,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:49,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-06-05 15:14:50,097 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 15:14:50,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045735735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:50,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:50,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:14:50,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993977] [2021-06-05 15:14:50,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:14:50,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:50,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:14:50,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:14:50,098 INFO L87 Difference]: Start difference. First operand 11208 states and 50815 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:51,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:51,963 INFO L93 Difference]: Finished difference Result 12209 states and 54551 transitions. [2021-06-05 15:14:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:14:51,963 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:14:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:51,991 INFO L225 Difference]: With dead ends: 12209 [2021-06-05 15:14:51,992 INFO L226 Difference]: Without dead ends: 12107 [2021-06-05 15:14:51,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1442.1ms TimeCoverageRelationStatistics Valid=353, Invalid=1903, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:14:52,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12107 states. [2021-06-05 15:14:52,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12107 to 11159. [2021-06-05 15:14:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11159 states, 11158 states have (on average 4.533428929915756) internal successors, (50584), 11158 states have internal predecessors, (50584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11159 states to 11159 states and 50584 transitions. [2021-06-05 15:14:52,194 INFO L78 Accepts]: Start accepts. Automaton has 11159 states and 50584 transitions. Word has length 33 [2021-06-05 15:14:52,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:52,194 INFO L482 AbstractCegarLoop]: Abstraction has 11159 states and 50584 transitions. [2021-06-05 15:14:52,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 11159 states and 50584 transitions. [2021-06-05 15:14:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:52,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:52,212 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, 1, 1, 1] [2021-06-05 15:14:52,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 15:14:52,413 INFO L430 AbstractCegarLoop]: === Iteration 343 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:52,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:52,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1010298814, now seen corresponding path program 262 times [2021-06-05 15:14:52,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:52,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638653451] [2021-06-05 15:14:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:52,604 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 15:14:52,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:52,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638653451] [2021-06-05 15:14:52,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638653451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:52,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902396398] [2021-06-05 15:14:52,604 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 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 15:14:52,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:52,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:52,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:52,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:52,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:52,786 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 28 treesize of output 12 [2021-06-05 15:14:52,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:52,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:52,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:52,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:15 [2021-06-05 15:14:52,854 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 15:14:52,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902396398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:52,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:52,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:14:52,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000554971] [2021-06-05 15:14:52,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:52,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:52,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:52,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:52,855 INFO L87 Difference]: Start difference. First operand 11159 states and 50584 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 15:14:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:54,144 INFO L93 Difference]: Finished difference Result 12023 states and 53915 transitions. [2021-06-05 15:14:54,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:14:54,145 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 33 [2021-06-05 15:14:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:54,176 INFO L225 Difference]: With dead ends: 12023 [2021-06-05 15:14:54,176 INFO L226 Difference]: Without dead ends: 11975 [2021-06-05 15:14:54,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1001.5ms TimeCoverageRelationStatistics Valid=303, Invalid=1859, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:14:54,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11975 states. [2021-06-05 15:14:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11975 to 11135. [2021-06-05 15:14:54,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11135 states, 11134 states have (on average 4.534219507813903) internal successors, (50484), 11134 states have internal predecessors, (50484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11135 states to 11135 states and 50484 transitions. [2021-06-05 15:14:54,387 INFO L78 Accepts]: Start accepts. Automaton has 11135 states and 50484 transitions. Word has length 33 [2021-06-05 15:14:54,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:54,387 INFO L482 AbstractCegarLoop]: Abstraction has 11135 states and 50484 transitions. [2021-06-05 15:14:54,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 15:14:54,387 INFO L276 IsEmpty]: Start isEmpty. Operand 11135 states and 50484 transitions. [2021-06-05 15:14:54,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:54,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:54,407 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, 1, 1, 1] [2021-06-05 15:14:54,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-06-05 15:14:54,607 INFO L430 AbstractCegarLoop]: === Iteration 344 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:54,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:54,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1139920728, now seen corresponding path program 263 times [2021-06-05 15:14:54,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:54,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186969296] [2021-06-05 15:14:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:54,836 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 15:14:54,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:54,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186969296] [2021-06-05 15:14:54,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186969296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:54,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719468525] [2021-06-05 15:14:54,837 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 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 15:14:54,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:14:54,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:54,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:54,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:54,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:54,997 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 29 treesize of output 13 [2021-06-05 15:14:54,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:55,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:55,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:55,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:16 [2021-06-05 15:14:55,106 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 15:14:55,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719468525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:55,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:55,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:14:55,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843252328] [2021-06-05 15:14:55,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:55,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:55,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:55,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:55,107 INFO L87 Difference]: Start difference. First operand 11135 states and 50484 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:14:57,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:57,186 INFO L93 Difference]: Finished difference Result 12233 states and 54568 transitions. [2021-06-05 15:14:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:14:57,186 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:14:57,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:57,214 INFO L225 Difference]: With dead ends: 12233 [2021-06-05 15:14:57,214 INFO L226 Difference]: Without dead ends: 12193 [2021-06-05 15:14:57,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1680.1ms TimeCoverageRelationStatistics Valid=452, Invalid=2628, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:14:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12193 states. [2021-06-05 15:14:57,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12193 to 11255. [2021-06-05 15:14:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11255 states, 11254 states have (on average 4.529234050115514) internal successors, (50972), 11254 states have internal predecessors, (50972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11255 states to 11255 states and 50972 transitions. [2021-06-05 15:14:57,417 INFO L78 Accepts]: Start accepts. Automaton has 11255 states and 50972 transitions. Word has length 33 [2021-06-05 15:14:57,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:57,418 INFO L482 AbstractCegarLoop]: Abstraction has 11255 states and 50972 transitions. [2021-06-05 15:14:57,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:14:57,418 INFO L276 IsEmpty]: Start isEmpty. Operand 11255 states and 50972 transitions. [2021-06-05 15:14:57,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:14:57,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:57,436 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, 1, 1, 1] [2021-06-05 15:14:57,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:57,636 INFO L430 AbstractCegarLoop]: === Iteration 345 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:57,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:57,638 INFO L82 PathProgramCache]: Analyzing trace with hash -528472714, now seen corresponding path program 264 times [2021-06-05 15:14:57,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:57,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563929480] [2021-06-05 15:14:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:57,857 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 15:14:57,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:57,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563929480] [2021-06-05 15:14:57,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563929480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:57,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817857617] [2021-06-05 15:14:57,858 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 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 15:14:57,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:14:57,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:57,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:14:57,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:58,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:58,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:58,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:58,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:58,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:58,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:14:58,228 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 15:14:58,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817857617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:58,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:58,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:14:58,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43558154] [2021-06-05 15:14:58,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:14:58,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:58,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:14:58,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:14:58,229 INFO L87 Difference]: Start difference. First operand 11255 states and 50972 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:01,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:01,906 INFO L93 Difference]: Finished difference Result 13399 states and 58370 transitions. [2021-06-05 15:15:01,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 15:15:01,907 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:15:01,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:01,939 INFO L225 Difference]: With dead ends: 13399 [2021-06-05 15:15:01,939 INFO L226 Difference]: Without dead ends: 13363 [2021-06-05 15:15:01,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 3152.8ms TimeCoverageRelationStatistics Valid=706, Invalid=4550, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:15:01,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13363 states. [2021-06-05 15:15:02,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13363 to 11211. [2021-06-05 15:15:02,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11211 states, 11210 states have (on average 4.529884032114183) internal successors, (50780), 11210 states have internal predecessors, (50780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:02,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11211 states to 11211 states and 50780 transitions. [2021-06-05 15:15:02,166 INFO L78 Accepts]: Start accepts. Automaton has 11211 states and 50780 transitions. Word has length 33 [2021-06-05 15:15:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:02,166 INFO L482 AbstractCegarLoop]: Abstraction has 11211 states and 50780 transitions. [2021-06-05 15:15:02,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:02,167 INFO L276 IsEmpty]: Start isEmpty. Operand 11211 states and 50780 transitions. [2021-06-05 15:15:02,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:15:02,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:02,186 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, 1, 1, 1] [2021-06-05 15:15:02,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 15:15:02,386 INFO L430 AbstractCegarLoop]: === Iteration 346 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:02,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:02,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1086534208, now seen corresponding path program 265 times [2021-06-05 15:15:02,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:02,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856252123] [2021-06-05 15:15:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:02,552 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 15:15:02,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:02,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856252123] [2021-06-05 15:15:02,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856252123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:02,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679635456] [2021-06-05 15:15:02,553 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 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 15:15:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:02,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:02,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:02,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:02,702 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 29 treesize of output 13 [2021-06-05 15:15:02,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:02,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:02,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:02,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:16 [2021-06-05 15:15:02,792 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 15:15:02,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679635456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:02,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:02,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:15:02,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529942277] [2021-06-05 15:15:02,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:15:02,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:02,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:15:02,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:15:02,793 INFO L87 Difference]: Start difference. First operand 11211 states and 50780 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 15:15:03,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:03,890 INFO L93 Difference]: Finished difference Result 11959 states and 53470 transitions. [2021-06-05 15:15:03,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:15:03,891 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 33 [2021-06-05 15:15:03,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:03,920 INFO L225 Difference]: With dead ends: 11959 [2021-06-05 15:15:03,920 INFO L226 Difference]: Without dead ends: 11886 [2021-06-05 15:15:03,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 893.4ms TimeCoverageRelationStatistics Valid=290, Invalid=1432, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:15:03,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11886 states. [2021-06-05 15:15:04,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11886 to 11217. [2021-06-05 15:15:04,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11217 states, 11216 states have (on average 4.529511412268188) internal successors, (50803), 11216 states have internal predecessors, (50803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:04,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11217 states to 11217 states and 50803 transitions. [2021-06-05 15:15:04,127 INFO L78 Accepts]: Start accepts. Automaton has 11217 states and 50803 transitions. Word has length 33 [2021-06-05 15:15:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:04,127 INFO L482 AbstractCegarLoop]: Abstraction has 11217 states and 50803 transitions. [2021-06-05 15:15:04,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 15:15:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 11217 states and 50803 transitions. [2021-06-05 15:15:04,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:15:04,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:04,146 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, 1, 1, 1] [2021-06-05 15:15:04,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:04,347 INFO L430 AbstractCegarLoop]: === Iteration 347 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:04,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:04,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2100590902, now seen corresponding path program 266 times [2021-06-05 15:15:04,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:04,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398678312] [2021-06-05 15:15:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:04,568 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 15:15:04,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:04,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398678312] [2021-06-05 15:15:04,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398678312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:04,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558848565] [2021-06-05 15:15:04,569 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 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 15:15:04,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:04,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:04,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:04,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:04,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:04,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:04,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:04,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:04,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:04,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:15:04,967 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 15:15:04,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558848565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:04,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:04,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:15:04,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571215749] [2021-06-05 15:15:04,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:04,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:04,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:04,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:04,968 INFO L87 Difference]: Start difference. First operand 11217 states and 50803 transitions. Second operand has 25 states, 25 states have (on average 2.04) 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 15:15:05,126 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-06-05 15:15:05,279 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 15:15:06,217 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-06-05 15:15:06,692 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-06-05 15:15:08,597 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 15:15:08,794 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2021-06-05 15:15:08,937 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-06-05 15:15:09,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:09,073 INFO L93 Difference]: Finished difference Result 13730 states and 59525 transitions. [2021-06-05 15:15:09,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:15:09,073 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) 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 33 [2021-06-05 15:15:09,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:09,107 INFO L225 Difference]: With dead ends: 13730 [2021-06-05 15:15:09,107 INFO L226 Difference]: Without dead ends: 13668 [2021-06-05 15:15:09,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 3711.6ms TimeCoverageRelationStatistics Valid=592, Invalid=3964, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:15:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13668 states. [2021-06-05 15:15:09,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13668 to 11370. [2021-06-05 15:15:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11370 states, 11369 states have (on average 4.527838860058052) internal successors, (51477), 11369 states have internal predecessors, (51477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11370 states to 11370 states and 51477 transitions. [2021-06-05 15:15:09,337 INFO L78 Accepts]: Start accepts. Automaton has 11370 states and 51477 transitions. Word has length 33 [2021-06-05 15:15:09,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:09,337 INFO L482 AbstractCegarLoop]: Abstraction has 11370 states and 51477 transitions. [2021-06-05 15:15:09,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) 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 15:15:09,337 INFO L276 IsEmpty]: Start isEmpty. Operand 11370 states and 51477 transitions. [2021-06-05 15:15:09,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:15:09,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:09,357 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, 1, 1, 1] [2021-06-05 15:15:09,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable538 [2021-06-05 15:15:09,557 INFO L430 AbstractCegarLoop]: === Iteration 348 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:09,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:09,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1735470066, now seen corresponding path program 267 times [2021-06-05 15:15:09,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:09,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302262886] [2021-06-05 15:15:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:09,779 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 15:15:09,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:09,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302262886] [2021-06-05 15:15:09,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302262886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:09,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966631361] [2021-06-05 15:15:09,780 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 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 15:15:09,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:15:09,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:09,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:09,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:09,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:09,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 15:15:09,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:09,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:09,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:09,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-06-05 15:15:10,163 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 15:15:10,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966631361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:10,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:10,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:15:10,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352910839] [2021-06-05 15:15:10,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:10,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:10,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:10,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:10,164 INFO L87 Difference]: Start difference. First operand 11370 states and 51477 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:13,103 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 15:15:13,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:13,687 INFO L93 Difference]: Finished difference Result 13740 states and 59514 transitions. [2021-06-05 15:15:13,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 15:15:13,688 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:15:13,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:13,723 INFO L225 Difference]: With dead ends: 13740 [2021-06-05 15:15:13,723 INFO L226 Difference]: Without dead ends: 13704 [2021-06-05 15:15:13,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 3175.4ms TimeCoverageRelationStatistics Valid=630, Invalid=3926, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:15:13,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13704 states. [2021-06-05 15:15:13,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13704 to 11273. [2021-06-05 15:15:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 11272 states have (on average 4.528566359119943) internal successors, (51046), 11272 states have internal predecessors, (51046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 51046 transitions. [2021-06-05 15:15:13,960 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 51046 transitions. Word has length 33 [2021-06-05 15:15:13,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:13,960 INFO L482 AbstractCegarLoop]: Abstraction has 11273 states and 51046 transitions. [2021-06-05 15:15:13,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:13,961 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 51046 transitions. [2021-06-05 15:15:13,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:15:13,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:13,980 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, 1, 1, 1] [2021-06-05 15:15:14,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-05 15:15:14,180 INFO L430 AbstractCegarLoop]: === Iteration 349 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:14,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:14,181 INFO L82 PathProgramCache]: Analyzing trace with hash -944490308, now seen corresponding path program 268 times [2021-06-05 15:15:14,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:14,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068473161] [2021-06-05 15:15:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:14,348 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 15:15:14,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:14,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068473161] [2021-06-05 15:15:14,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068473161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:14,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685935939] [2021-06-05 15:15:14,349 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 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 15:15:14,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:14,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:14,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:14,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:14,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:14,501 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 29 treesize of output 13 [2021-06-05 15:15:14,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:14,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:14,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:14,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:16 [2021-06-05 15:15:14,591 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 15:15:14,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685935939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:14,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:14,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:15:14,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938039655] [2021-06-05 15:15:14,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:15:14,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:14,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:15:14,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:15:14,592 INFO L87 Difference]: Start difference. First operand 11273 states and 51046 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 15:15:15,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:15,744 INFO L93 Difference]: Finished difference Result 12116 states and 54020 transitions. [2021-06-05 15:15:15,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:15:15,745 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 33 [2021-06-05 15:15:15,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:15,773 INFO L225 Difference]: With dead ends: 12116 [2021-06-05 15:15:15,773 INFO L226 Difference]: Without dead ends: 12026 [2021-06-05 15:15:15,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 895.5ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:15:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12026 states. [2021-06-05 15:15:15,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12026 to 11233. [2021-06-05 15:15:15,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11233 states, 11232 states have (on average 4.529647435897436) internal successors, (50877), 11232 states have internal predecessors, (50877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:15,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11233 states to 11233 states and 50877 transitions. [2021-06-05 15:15:15,984 INFO L78 Accepts]: Start accepts. Automaton has 11233 states and 50877 transitions. Word has length 33 [2021-06-05 15:15:15,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:15,984 INFO L482 AbstractCegarLoop]: Abstraction has 11233 states and 50877 transitions. [2021-06-05 15:15:15,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 15:15:15,984 INFO L276 IsEmpty]: Start isEmpty. Operand 11233 states and 50877 transitions. [2021-06-05 15:15:16,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:15:16,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:16,003 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, 1, 1, 1] [2021-06-05 15:15:16,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 15:15:16,203 INFO L430 AbstractCegarLoop]: === Iteration 350 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:16,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:16,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1675144074, now seen corresponding path program 269 times [2021-06-05 15:15:16,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:16,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217005827] [2021-06-05 15:15:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:16,423 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 15:15:16,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:16,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217005827] [2021-06-05 15:15:16,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217005827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:16,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855769499] [2021-06-05 15:15:16,424 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 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 15:15:16,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:15:16,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:16,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:16,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:16,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:16,580 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 29 treesize of output 13 [2021-06-05 15:15:16,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:16,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:16,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:16,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:16 [2021-06-05 15:15:16,673 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 15:15:16,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855769499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:16,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:16,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:15:16,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840614711] [2021-06-05 15:15:16,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:15:16,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:16,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:15:16,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:15:16,674 INFO L87 Difference]: Start difference. First operand 11233 states and 50877 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:15:16,811 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 15:15:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:18,745 INFO L93 Difference]: Finished difference Result 12612 states and 55585 transitions. [2021-06-05 15:15:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:15:18,745 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 15:15:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:18,779 INFO L225 Difference]: With dead ends: 12612 [2021-06-05 15:15:18,779 INFO L226 Difference]: Without dead ends: 12572 [2021-06-05 15:15:18,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1693.9ms TimeCoverageRelationStatistics Valid=258, Invalid=1998, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:15:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12572 states. [2021-06-05 15:15:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12572 to 11236. [2021-06-05 15:15:18,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11236 states, 11235 states have (on average 4.528971962616822) internal successors, (50883), 11235 states have internal predecessors, (50883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11236 states to 11236 states and 50883 transitions. [2021-06-05 15:15:18,989 INFO L78 Accepts]: Start accepts. Automaton has 11236 states and 50883 transitions. Word has length 33 [2021-06-05 15:15:18,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:18,989 INFO L482 AbstractCegarLoop]: Abstraction has 11236 states and 50883 transitions. [2021-06-05 15:15:18,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:15:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 11236 states and 50883 transitions. [2021-06-05 15:15:19,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:15:19,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:19,008 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, 1, 1, 1] [2021-06-05 15:15:19,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-05 15:15:19,209 INFO L430 AbstractCegarLoop]: === Iteration 351 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:19,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:19,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1685000792, now seen corresponding path program 270 times [2021-06-05 15:15:19,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:19,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383881728] [2021-06-05 15:15:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:19,422 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 15:15:19,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:19,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383881728] [2021-06-05 15:15:19,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383881728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:19,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299811806] [2021-06-05 15:15:19,422 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 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 15:15:19,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:15:19,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:19,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:15:19,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:19,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:19,588 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 15:15:19,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:19,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:19,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:19,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:15:19,767 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 15:15:19,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299811806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:19,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:19,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:15:19,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641980065] [2021-06-05 15:15:19,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:15:19,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:19,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:15:19,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:15:19,768 INFO L87 Difference]: Start difference. First operand 11236 states and 50883 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) 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 15:15:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:22,049 INFO L93 Difference]: Finished difference Result 12070 states and 54004 transitions. [2021-06-05 15:15:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:15:22,049 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) 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 33 [2021-06-05 15:15:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:22,155 INFO L225 Difference]: With dead ends: 12070 [2021-06-05 15:15:22,155 INFO L226 Difference]: Without dead ends: 12032 [2021-06-05 15:15:22,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1893.7ms TimeCoverageRelationStatistics Valid=381, Invalid=3041, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:15:22,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12032 states. [2021-06-05 15:15:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12032 to 11221. [2021-06-05 15:15:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11221 states, 11220 states have (on average 4.530659536541889) internal successors, (50834), 11220 states have internal predecessors, (50834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11221 states to 11221 states and 50834 transitions. [2021-06-05 15:15:22,337 INFO L78 Accepts]: Start accepts. Automaton has 11221 states and 50834 transitions. Word has length 33 [2021-06-05 15:15:22,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:22,337 INFO L482 AbstractCegarLoop]: Abstraction has 11221 states and 50834 transitions. [2021-06-05 15:15:22,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) 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 15:15:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 11221 states and 50834 transitions. [2021-06-05 15:15:22,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:15:22,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:22,356 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, 1, 1, 1] [2021-06-05 15:15:22,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:22,556 INFO L430 AbstractCegarLoop]: === Iteration 352 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:22,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:22,557 INFO L82 PathProgramCache]: Analyzing trace with hash -85868262, now seen corresponding path program 271 times [2021-06-05 15:15:22,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:22,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618159334] [2021-06-05 15:15:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:22,716 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 15:15:22,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:22,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618159334] [2021-06-05 15:15:22,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618159334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:22,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769027101] [2021-06-05 15:15:22,717 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 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 15:15:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:22,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:22,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:22,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:22,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-06-05 15:15:22,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:22,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:22,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:22,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:15 [2021-06-05 15:15:22,970 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 15:15:22,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769027101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:22,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:22,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:15:22,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766318213] [2021-06-05 15:15:22,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:22,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:22,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:22,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:22,971 INFO L87 Difference]: Start difference. First operand 11221 states and 50834 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:15:24,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:24,247 INFO L93 Difference]: Finished difference Result 12499 states and 55871 transitions. [2021-06-05 15:15:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:15:24,247 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:15:24,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:24,278 INFO L225 Difference]: With dead ends: 12499 [2021-06-05 15:15:24,278 INFO L226 Difference]: Without dead ends: 12433 [2021-06-05 15:15:24,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1071.1ms TimeCoverageRelationStatistics Valid=315, Invalid=2037, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:15:24,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12433 states. [2021-06-05 15:15:24,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12433 to 11269. [2021-06-05 15:15:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 4.533102591409301) internal successors, (51079), 11268 states have internal predecessors, (51079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:24,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 51079 transitions. [2021-06-05 15:15:24,482 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 51079 transitions. Word has length 33 [2021-06-05 15:15:24,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:24,482 INFO L482 AbstractCegarLoop]: Abstraction has 11269 states and 51079 transitions. [2021-06-05 15:15:24,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:15:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 51079 transitions. [2021-06-05 15:15:24,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:15:24,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:24,501 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, 1, 1, 1] [2021-06-05 15:15:24,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 15:15:24,701 INFO L430 AbstractCegarLoop]: === Iteration 353 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:24,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:24,701 INFO L82 PathProgramCache]: Analyzing trace with hash 566381842, now seen corresponding path program 272 times [2021-06-05 15:15:24,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:24,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876092631] [2021-06-05 15:15:24,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:24,847 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 15:15:24,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:24,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876092631] [2021-06-05 15:15:24,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876092631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:24,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611694688] [2021-06-05 15:15:24,848 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 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 15:15:24,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:24,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:24,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:15:24,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:25,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:25,048 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 15:15:25,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:25,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:25,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:25,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:30 [2021-06-05 15:15:25,158 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 15:15:25,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611694688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:25,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:25,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 15:15:25,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015861893] [2021-06-05 15:15:25,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:25,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:25,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:25,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:25,159 INFO L87 Difference]: Start difference. First operand 11269 states and 51079 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:26,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:26,208 INFO L93 Difference]: Finished difference Result 11903 states and 53574 transitions. [2021-06-05 15:15:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:15:26,209 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:15:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:26,238 INFO L225 Difference]: With dead ends: 11903 [2021-06-05 15:15:26,238 INFO L226 Difference]: Without dead ends: 11874 [2021-06-05 15:15:26,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 839.5ms TimeCoverageRelationStatistics Valid=207, Invalid=1515, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:15:26,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11874 states. [2021-06-05 15:15:26,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11874 to 11254. [2021-06-05 15:15:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11254 states, 11253 states have (on average 4.534079800941971) internal successors, (51022), 11253 states have internal predecessors, (51022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11254 states to 11254 states and 51022 transitions. [2021-06-05 15:15:26,527 INFO L78 Accepts]: Start accepts. Automaton has 11254 states and 51022 transitions. Word has length 33 [2021-06-05 15:15:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:26,528 INFO L482 AbstractCegarLoop]: Abstraction has 11254 states and 51022 transitions. [2021-06-05 15:15:26,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 11254 states and 51022 transitions. [2021-06-05 15:15:26,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:15:26,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:26,546 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, 1, 1, 1] [2021-06-05 15:15:26,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-06-05 15:15:26,747 INFO L430 AbstractCegarLoop]: === Iteration 354 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:26,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1822123194, now seen corresponding path program 273 times [2021-06-05 15:15:26,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:26,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779394099] [2021-06-05 15:15:26,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:26,900 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 15:15:26,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:26,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779394099] [2021-06-05 15:15:26,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779394099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:26,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225569318] [2021-06-05 15:15:26,901 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 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 15:15:26,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:15:26,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:26,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:26,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:27,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:27,091 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:15:27,091 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-05 15:15:27,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:27,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:27,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:27,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 15:15:27,299 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 15:15:27,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225569318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:27,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:27,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 15:15:27,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366298252] [2021-06-05 15:15:27,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:15:27,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:27,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:15:27,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:15:27,300 INFO L87 Difference]: Start difference. First operand 11254 states and 51022 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:28,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:28,832 INFO L93 Difference]: Finished difference Result 11858 states and 53362 transitions. [2021-06-05 15:15:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:15:28,832 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:15:28,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:28,860 INFO L225 Difference]: With dead ends: 11858 [2021-06-05 15:15:28,860 INFO L226 Difference]: Without dead ends: 11808 [2021-06-05 15:15:28,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1177.6ms TimeCoverageRelationStatistics Valid=334, Invalid=2216, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:15:28,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11808 states. [2021-06-05 15:15:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11808 to 11214. [2021-06-05 15:15:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11214 states, 11213 states have (on average 4.535806652992063) internal successors, (50860), 11213 states have internal predecessors, (50860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11214 states to 11214 states and 50860 transitions. [2021-06-05 15:15:29,068 INFO L78 Accepts]: Start accepts. Automaton has 11214 states and 50860 transitions. Word has length 33 [2021-06-05 15:15:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:29,068 INFO L482 AbstractCegarLoop]: Abstraction has 11214 states and 50860 transitions. [2021-06-05 15:15:29,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 11214 states and 50860 transitions. [2021-06-05 15:15:29,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:15:29,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:29,087 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, 1, 1, 1] [2021-06-05 15:15:29,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:29,288 INFO L430 AbstractCegarLoop]: === Iteration 355 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:29,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1863419358, now seen corresponding path program 274 times [2021-06-05 15:15:29,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:29,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966006773] [2021-06-05 15:15:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:29,455 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 15:15:29,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:29,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966006773] [2021-06-05 15:15:29,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966006773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:29,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645891707] [2021-06-05 15:15:29,455 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 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 15:15:29,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:29,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:29,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:29,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:29,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:29,603 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 29 treesize of output 13 [2021-06-05 15:15:29,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:29,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:29,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:29,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:16 [2021-06-05 15:15:29,709 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 15:15:29,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645891707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:29,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:29,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 15:15:29,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618721918] [2021-06-05 15:15:29,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:29,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:29,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:29,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:29,710 INFO L87 Difference]: Start difference. First operand 11214 states and 50860 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:15:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:30,995 INFO L93 Difference]: Finished difference Result 12117 states and 54333 transitions. [2021-06-05 15:15:30,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:15:30,996 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 33 [2021-06-05 15:15:30,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:31,024 INFO L225 Difference]: With dead ends: 12117 [2021-06-05 15:15:31,024 INFO L226 Difference]: Without dead ends: 12071 [2021-06-05 15:15:31,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1068.2ms TimeCoverageRelationStatistics Valid=319, Invalid=1751, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:15:31,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12071 states. [2021-06-05 15:15:31,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12071 to 11214. [2021-06-05 15:15:31,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11214 states, 11213 states have (on average 4.535806652992063) internal successors, (50860), 11213 states have internal predecessors, (50860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11214 states to 11214 states and 50860 transitions. [2021-06-05 15:15:31,301 INFO L78 Accepts]: Start accepts. Automaton has 11214 states and 50860 transitions. Word has length 33 [2021-06-05 15:15:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:31,302 INFO L482 AbstractCegarLoop]: Abstraction has 11214 states and 50860 transitions. [2021-06-05 15:15:31,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 15:15:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 11214 states and 50860 transitions. [2021-06-05 15:15:31,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:15:31,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:31,321 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, 1, 1, 1] [2021-06-05 15:15:31,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 15:15:31,521 INFO L430 AbstractCegarLoop]: === Iteration 356 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:31,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:31,522 INFO L82 PathProgramCache]: Analyzing trace with hash 6184350, now seen corresponding path program 275 times [2021-06-05 15:15:31,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:31,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988340335] [2021-06-05 15:15:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:31,691 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 15:15:31,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:31,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988340335] [2021-06-05 15:15:31,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988340335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:31,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853855131] [2021-06-05 15:15:31,691 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 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 15:15:31,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:15:31,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:31,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:31,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:31,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:31,836 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 29 treesize of output 13 [2021-06-05 15:15:31,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:31,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:31,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:31,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:16 [2021-06-05 15:15:31,924 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 15:15:31,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853855131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:31,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:31,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 15:15:31,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020154385] [2021-06-05 15:15:31,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:15:31,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:31,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:15:31,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:15:31,925 INFO L87 Difference]: Start difference. First operand 11214 states and 50860 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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 15:15:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:32,993 INFO L93 Difference]: Finished difference Result 11843 states and 53265 transitions. [2021-06-05 15:15:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:15:32,993 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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 33 [2021-06-05 15:15:32,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:33,020 INFO L225 Difference]: With dead ends: 11843 [2021-06-05 15:15:33,020 INFO L226 Difference]: Without dead ends: 11795 [2021-06-05 15:15:33,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 852.7ms TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:15:33,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11795 states. [2021-06-05 15:15:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11795 to 11205. [2021-06-05 15:15:33,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11205 states, 11204 states have (on average 4.536147804355587) internal successors, (50823), 11204 states have internal predecessors, (50823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11205 states to 11205 states and 50823 transitions. [2021-06-05 15:15:33,217 INFO L78 Accepts]: Start accepts. Automaton has 11205 states and 50823 transitions. Word has length 33 [2021-06-05 15:15:33,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:33,217 INFO L482 AbstractCegarLoop]: Abstraction has 11205 states and 50823 transitions. [2021-06-05 15:15:33,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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 15:15:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 11205 states and 50823 transitions. [2021-06-05 15:15:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:15:33,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:33,236 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, 1, 1, 1] [2021-06-05 15:15:33,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:33,436 INFO L430 AbstractCegarLoop]: === Iteration 357 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:33,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:33,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1167786446, now seen corresponding path program 276 times [2021-06-05 15:15:33,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:33,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403955869] [2021-06-05 15:15:33,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:33,671 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 15:15:33,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:33,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403955869] [2021-06-05 15:15:33,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403955869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:33,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158584529] [2021-06-05 15:15:33,672 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 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 15:15:33,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:15:33,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:33,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:33,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:33,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:33,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:33,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:33,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:33,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:33,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:15:34,055 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 15:15:34,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158584529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:34,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:34,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 15:15:34,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273353105] [2021-06-05 15:15:34,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:34,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:34,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:34,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:34,056 INFO L87 Difference]: Start difference. First operand 11205 states and 50823 transitions. Second operand has 25 states, 25 states have (on average 2.04) 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 15:15:37,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:37,315 INFO L93 Difference]: Finished difference Result 13163 states and 57506 transitions. [2021-06-05 15:15:37,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:15:37,315 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) 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 33 [2021-06-05 15:15:37,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:37,347 INFO L225 Difference]: With dead ends: 13163 [2021-06-05 15:15:37,347 INFO L226 Difference]: Without dead ends: 13061 [2021-06-05 15:15:37,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 2964.3ms TimeCoverageRelationStatistics Valid=605, Invalid=3555, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:15:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13061 states. [2021-06-05 15:15:37,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13061 to 11209. [2021-06-05 15:15:37,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11209 states, 11208 states have (on average 4.536581013561742) internal successors, (50846), 11208 states have internal predecessors, (50846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:37,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11209 states to 11209 states and 50846 transitions. [2021-06-05 15:15:37,563 INFO L78 Accepts]: Start accepts. Automaton has 11209 states and 50846 transitions. Word has length 33 [2021-06-05 15:15:37,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:37,563 INFO L482 AbstractCegarLoop]: Abstraction has 11209 states and 50846 transitions. [2021-06-05 15:15:37,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) 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 15:15:37,563 INFO L276 IsEmpty]: Start isEmpty. Operand 11209 states and 50846 transitions. [2021-06-05 15:15:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:15:37,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:37,581 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, 1, 1, 1] [2021-06-05 15:15:37,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-05 15:15:37,782 INFO L430 AbstractCegarLoop]: === Iteration 358 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:37,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:37,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1687018766, now seen corresponding path program 277 times [2021-06-05 15:15:37,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:37,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568699543] [2021-06-05 15:15:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:38,002 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 15:15:38,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:38,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568699543] [2021-06-05 15:15:38,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568699543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:38,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338529682] [2021-06-05 15:15:38,003 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 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 15:15:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:38,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:38,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:38,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:38,153 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 29 treesize of output 13 [2021-06-05 15:15:38,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:38,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:38,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:38,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:16 [2021-06-05 15:15:38,244 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 15:15:38,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338529682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:38,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:38,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 15:15:38,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055179972] [2021-06-05 15:15:38,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:15:38,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:38,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:15:38,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:15:38,245 INFO L87 Difference]: Start difference. First operand 11209 states and 50846 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 15:15:39,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:39,882 INFO L93 Difference]: Finished difference Result 12644 states and 55800 transitions. [2021-06-05 15:15:39,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:15:39,882 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 33 [2021-06-05 15:15:39,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:39,914 INFO L225 Difference]: With dead ends: 12644 [2021-06-05 15:15:39,914 INFO L226 Difference]: Without dead ends: 12574 [2021-06-05 15:15:39,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1407.8ms TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:15:39,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12574 states. Received shutdown request... [2021-06-05 15:15:40,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12574 to 11212. [2021-06-05 15:15:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11212 states, 11211 states have (on average 4.535902238872536) internal successors, (50852), 11211 states have internal predecessors, (50852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:40,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:40,302 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 15:15:40,304 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:15:40,309 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 15:15:40,309 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:15:40 BasicIcfg [2021-06-05 15:15:40,309 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:15:40,310 INFO L168 Benchmark]: Toolchain (without parser) took 775029.23 ms. Allocated memory was 356.5 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 335.4 MB in the beginning and 989.5 MB in the end (delta: -654.0 MB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. [2021-06-05 15:15:40,311 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 356.5 MB. Free memory was 336.7 MB in the beginning and 336.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:15:40,311 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.99 ms. Allocated memory is still 356.5 MB. Free memory was 335.4 MB in the beginning and 333.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:15:40,314 INFO L168 Benchmark]: Boogie Preprocessor took 15.17 ms. Allocated memory is still 356.5 MB. Free memory was 333.9 MB in the beginning and 332.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:15:40,314 INFO L168 Benchmark]: RCFGBuilder took 306.54 ms. Allocated memory is still 356.5 MB. Free memory was 332.8 MB in the beginning and 316.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 15:15:40,315 INFO L168 Benchmark]: TraceAbstraction took 774679.22 ms. Allocated memory was 356.5 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 315.6 MB in the beginning and 989.5 MB in the end (delta: -673.8 MB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. [2021-06-05 15:15:40,315 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 356.5 MB. Free memory was 336.7 MB in the beginning and 336.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.99 ms. Allocated memory is still 356.5 MB. Free memory was 335.4 MB in the beginning and 333.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.17 ms. Allocated memory is still 356.5 MB. Free memory was 333.9 MB in the beginning and 332.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 306.54 ms. Allocated memory is still 356.5 MB. Free memory was 332.8 MB in the beginning and 316.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 774679.22 ms. Allocated memory was 356.5 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 315.6 MB in the beginning and 989.5 MB in the end (delta: -673.8 MB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - 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 ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - 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 ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 774426.6ms, OverallIterations: 358, TraceHistogramMax: 2, EmptinessCheckTime: 4054.9ms, AutomataDifference: 487002.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 54.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 44575 SDtfs, 158974 SDslu, 564439 SDs, 0 SdLazy, 362660 SolverSat, 26073 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 140926.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22440 GetRequests, 7604 SyntacticMatches, 770 SemanticMatches, 14066 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164243 ImplicationChecksByTransitivity, 400982.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11370occurred in iteration=347, InterpolantAutomatonStates: 11553, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 44453.0ms AutomataMinimizationTime, 358 MinimizatonAttempts, 308390 StatesRemovedByMinimization, 357 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2283.0ms SsaConstructionTime, 5429.8ms SatisfiabilityAnalysisTime, 150314.1ms InterpolantComputationTime, 22555 NumberOfCodeBlocks, 22555 NumberOfCodeBlocksAsserted, 1180 NumberOfCheckSat, 21842 ConstructedInterpolants, 63 QuantifiedInterpolants, 386307 SizeOfPredicates, 4414 NumberOfNonLiveVariables, 48744 ConjunctsInSsa, 12878 ConjunctsInUnsatCore, 713 InterpolantComputations, 5 PerfectInterpolantSequences, 43/4269 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