/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:29:44,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:29:44,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:29:44,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 22:29:44,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 22:29:44,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 22:29:44,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 22:29:44,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 22:29:44,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 22:29:44,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 22:29:44,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 22:29:44,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 22:29:44,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 22:29:44,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 22:29:44,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 22:29:44,812 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.epf [2021-03-10 22:29:44,856 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:29:44,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:29:44,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:29:44,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:29:44,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:29:44,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:29:44,862 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:29:44,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:29:44,862 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:29:44,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:29:44,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:29:44,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:29:44,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:29:44,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:29:44,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:29:44,864 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:29:44,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:29:44,864 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:29:44,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:29:44,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:29:44,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:29:44,865 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:29:44,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:29:44,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:29:44,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:29:44,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:29:44,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:29:44,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:29:44,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:29:44,866 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:29:44,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:29:44,866 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:29:45,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:29:45,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:29:45,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:29:45,203 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:29:45,205 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:29:45,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl [2021-03-10 22:29:45,207 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl' [2021-03-10 22:29:45,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:29:45,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:29:45,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:29:45,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:29:45,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:29:45,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:45" (1/1) ... [2021-03-10 22:29:45,308 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:45" (1/1) ... [2021-03-10 22:29:45,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:29:45,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:29:45,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:29:45,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:29:45,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:45" (1/1) ... [2021-03-10 22:29:45,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:45" (1/1) ... [2021-03-10 22:29:45,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:45" (1/1) ... [2021-03-10 22:29:45,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:45" (1/1) ... [2021-03-10 22:29:45,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:45" (1/1) ... [2021-03-10 22:29:45,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:45" (1/1) ... [2021-03-10 22:29:45,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:45" (1/1) ... [2021-03-10 22:29:45,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:29:45,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:29:45,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:29:45,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:29:45,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:45" (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 [2021-03-10 22:29:45,456 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:29:45,457 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:29:45,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:29:45,459 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:29:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:29:45,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:29:45,459 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:29:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:29:45,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:29:45,459 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 22:29:45,459 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 22:29:45,460 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 22:29:45,461 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-10 22:29:45,461 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-10 22:29:45,461 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-10 22:29:45,462 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-03-10 22:29:45,462 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-03-10 22:29:45,462 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-03-10 22:29:45,462 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-03-10 22:29:45,463 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-03-10 22:29:45,463 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-03-10 22:29:45,464 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 22:29:45,883 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:29:45,883 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-03-10 22:29:45,884 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-03-10 22:29:45,885 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-03-10 22:29:45,885 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-03-10 22:29:45,885 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-03-10 22:29:45,887 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:29:45 BoogieIcfgContainer [2021-03-10 22:29:45,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:29:45,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:29:45,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:29:45,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:29:45,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:45" (1/2) ... [2021-03-10 22:29:45,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d97da23 and model type parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:29:45, skipping insertion in model container [2021-03-10 22:29:45,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:29:45" (2/2) ... [2021-03-10 22:29:45,898 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1-dsl.wvr.bpl [2021-03-10 22:29:45,909 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:29:45,910 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:29:45,914 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:29:45,915 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:29:46,027 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-03-10 22:29:46,043 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-03-10 22:29:46,071 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:29:46,071 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:29:46,071 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:29:46,071 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:29:46,071 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:29:46,072 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:29:46,072 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:29:46,072 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:29:46,082 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-03-10 22:29:46,144 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:29:46,181 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:46,183 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:46,183 INFO L428 AbstractCegarLoop]: === Iteration 1 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:46,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:46,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2039335680, now seen corresponding path program 1 times [2021-03-10 22:29:46,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:46,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696931631] [2021-03-10 22:29:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:46,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696931631] [2021-03-10 22:29:46,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:46,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:29:46,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899014844] [2021-03-10 22:29:46,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:29:46,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:46,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:29:46,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:29:46,537 INFO L87 Difference]: Start difference. First operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:46,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:46,702 INFO L93 Difference]: Finished difference Result 1089 states and 4336 transitions. [2021-03-10 22:29:46,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:29:46,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:29:46,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:46,766 INFO L225 Difference]: With dead ends: 1089 [2021-03-10 22:29:46,766 INFO L226 Difference]: Without dead ends: 1068 [2021-03-10 22:29:46,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:29:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-03-10 22:29:46,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 525. [2021-03-10 22:29:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.881679389312977) internal successors, (2034), 524 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 2034 transitions. [2021-03-10 22:29:46,886 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 2034 transitions. Word has length 22 [2021-03-10 22:29:46,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:46,888 INFO L480 AbstractCegarLoop]: Abstraction has 525 states and 2034 transitions. [2021-03-10 22:29:46,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:46,888 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 2034 transitions. [2021-03-10 22:29:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:29:46,891 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:46,892 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:46,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:29:46,892 INFO L428 AbstractCegarLoop]: === Iteration 2 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:46,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:46,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1643355036, now seen corresponding path program 2 times [2021-03-10 22:29:46,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:46,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446966238] [2021-03-10 22:29:46,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:46,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446966238] [2021-03-10 22:29:46,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:46,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:29:46,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053975380] [2021-03-10 22:29:46,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:29:46,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:46,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:29:46,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:29:46,981 INFO L87 Difference]: Start difference. First operand 525 states and 2034 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:47,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:47,042 INFO L93 Difference]: Finished difference Result 1218 states and 4830 transitions. [2021-03-10 22:29:47,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:29:47,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:29:47,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:47,056 INFO L225 Difference]: With dead ends: 1218 [2021-03-10 22:29:47,056 INFO L226 Difference]: Without dead ends: 1197 [2021-03-10 22:29:47,057 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:29:47,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-03-10 22:29:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 545. [2021-03-10 22:29:47,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.8529411764705883) internal successors, (2096), 544 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 2096 transitions. [2021-03-10 22:29:47,117 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 2096 transitions. Word has length 22 [2021-03-10 22:29:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:47,119 INFO L480 AbstractCegarLoop]: Abstraction has 545 states and 2096 transitions. [2021-03-10 22:29:47,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 2096 transitions. [2021-03-10 22:29:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:47,124 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:47,124 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:47,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 22:29:47,124 INFO L428 AbstractCegarLoop]: === Iteration 3 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:47,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:47,126 INFO L82 PathProgramCache]: Analyzing trace with hash -661584511, now seen corresponding path program 1 times [2021-03-10 22:29:47,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:47,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560899592] [2021-03-10 22:29:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:47,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560899592] [2021-03-10 22:29:47,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:47,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:29:47,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524932977] [2021-03-10 22:29:47,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:29:47,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:47,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:29:47,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:29:47,164 INFO L87 Difference]: Start difference. First operand 545 states and 2096 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:47,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:47,191 INFO L93 Difference]: Finished difference Result 545 states and 1997 transitions. [2021-03-10 22:29:47,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:29:47,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:47,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:47,197 INFO L225 Difference]: With dead ends: 545 [2021-03-10 22:29:47,197 INFO L226 Difference]: Without dead ends: 529 [2021-03-10 22:29:47,198 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:29:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-03-10 22:29:47,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-03-10 22:29:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.6761363636363638) internal successors, (1941), 528 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:47,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1941 transitions. [2021-03-10 22:29:47,222 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1941 transitions. Word has length 24 [2021-03-10 22:29:47,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:47,222 INFO L480 AbstractCegarLoop]: Abstraction has 529 states and 1941 transitions. [2021-03-10 22:29:47,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:47,223 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1941 transitions. [2021-03-10 22:29:47,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:47,226 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:47,226 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:47,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 22:29:47,226 INFO L428 AbstractCegarLoop]: === Iteration 4 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:47,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:47,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1934875805, now seen corresponding path program 2 times [2021-03-10 22:29:47,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:47,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873602107] [2021-03-10 22:29:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:47,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873602107] [2021-03-10 22:29:47,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:47,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:29:47,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754255085] [2021-03-10 22:29:47,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:29:47,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:47,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:29:47,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:29:47,327 INFO L87 Difference]: Start difference. First operand 529 states and 1941 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:47,456 INFO L93 Difference]: Finished difference Result 1358 states and 5017 transitions. [2021-03-10 22:29:47,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:29:47,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:47,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:47,475 INFO L225 Difference]: With dead ends: 1358 [2021-03-10 22:29:47,476 INFO L226 Difference]: Without dead ends: 1346 [2021-03-10 22:29:47,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:29:47,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-03-10 22:29:47,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 680. [2021-03-10 22:29:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.787923416789396) internal successors, (2572), 679 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2572 transitions. [2021-03-10 22:29:47,529 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2572 transitions. Word has length 24 [2021-03-10 22:29:47,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:47,530 INFO L480 AbstractCegarLoop]: Abstraction has 680 states and 2572 transitions. [2021-03-10 22:29:47,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:47,530 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2572 transitions. [2021-03-10 22:29:47,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:47,534 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:47,534 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:47,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 22:29:47,534 INFO L428 AbstractCegarLoop]: === Iteration 5 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:47,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:47,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2074450649, now seen corresponding path program 1 times [2021-03-10 22:29:47,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:47,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4879861] [2021-03-10 22:29:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:47,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4879861] [2021-03-10 22:29:47,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:47,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:29:47,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364912483] [2021-03-10 22:29:47,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:29:47,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:47,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:29:47,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:29:47,589 INFO L87 Difference]: Start difference. First operand 680 states and 2572 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:47,625 INFO L93 Difference]: Finished difference Result 652 states and 2325 transitions. [2021-03-10 22:29:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:29:47,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:47,630 INFO L225 Difference]: With dead ends: 652 [2021-03-10 22:29:47,631 INFO L226 Difference]: Without dead ends: 604 [2021-03-10 22:29:47,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:29:47,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-03-10 22:29:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-03-10 22:29:47,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.583747927031509) internal successors, (2161), 603 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 2161 transitions. [2021-03-10 22:29:47,657 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 2161 transitions. Word has length 24 [2021-03-10 22:29:47,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:47,657 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 2161 transitions. [2021-03-10 22:29:47,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:47,657 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 2161 transitions. [2021-03-10 22:29:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:47,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:47,660 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:47,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 22:29:47,661 INFO L428 AbstractCegarLoop]: === Iteration 6 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:47,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:47,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1944733407, now seen corresponding path program 1 times [2021-03-10 22:29:47,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:47,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889103708] [2021-03-10 22:29:47,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:47,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889103708] [2021-03-10 22:29:47,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046296048] [2021-03-10 22:29:47,730 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 [2021-03-10 22:29:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:47,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:29:47,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:48,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:48,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 22:29:48,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105190067] [2021-03-10 22:29:48,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:29:48,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:48,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:29:48,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:29:48,040 INFO L87 Difference]: Start difference. First operand 604 states and 2161 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:48,149 INFO L93 Difference]: Finished difference Result 1057 states and 3653 transitions. [2021-03-10 22:29:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:29:48,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:48,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:48,163 INFO L225 Difference]: With dead ends: 1057 [2021-03-10 22:29:48,163 INFO L226 Difference]: Without dead ends: 989 [2021-03-10 22:29:48,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:29:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-03-10 22:29:48,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 685. [2021-03-10 22:29:48,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.6271929824561404) internal successors, (2481), 684 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2481 transitions. [2021-03-10 22:29:48,222 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2481 transitions. Word has length 24 [2021-03-10 22:29:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:48,223 INFO L480 AbstractCegarLoop]: Abstraction has 685 states and 2481 transitions. [2021-03-10 22:29:48,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:48,224 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2481 transitions. [2021-03-10 22:29:48,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:48,227 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:48,227 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:48,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-03-10 22:29:48,443 INFO L428 AbstractCegarLoop]: === Iteration 7 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:48,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:48,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1051081059, now seen corresponding path program 2 times [2021-03-10 22:29:48,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:48,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42482523] [2021-03-10 22:29:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:48,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42482523] [2021-03-10 22:29:48,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:48,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:29:48,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780477378] [2021-03-10 22:29:48,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:29:48,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:48,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:29:48,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:29:48,496 INFO L87 Difference]: Start difference. First operand 685 states and 2481 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:48,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:48,582 INFO L93 Difference]: Finished difference Result 990 states and 3448 transitions. [2021-03-10 22:29:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:29:48,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:48,589 INFO L225 Difference]: With dead ends: 990 [2021-03-10 22:29:48,589 INFO L226 Difference]: Without dead ends: 963 [2021-03-10 22:29:48,590 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:29:48,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-03-10 22:29:48,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 703. [2021-03-10 22:29:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.6210826210826212) internal successors, (2542), 702 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2542 transitions. [2021-03-10 22:29:48,628 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2542 transitions. Word has length 24 [2021-03-10 22:29:48,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:48,629 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 2542 transitions. [2021-03-10 22:29:48,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:48,630 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2542 transitions. [2021-03-10 22:29:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:48,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:48,636 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:48,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 22:29:48,637 INFO L428 AbstractCegarLoop]: === Iteration 8 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:48,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:48,637 INFO L82 PathProgramCache]: Analyzing trace with hash 628675505, now seen corresponding path program 3 times [2021-03-10 22:29:48,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:48,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875736764] [2021-03-10 22:29:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:48,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875736764] [2021-03-10 22:29:48,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445269615] [2021-03-10 22:29:48,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:48,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:29:48,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:48,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:29:48,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:48,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:48,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 22:29:48,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151669236] [2021-03-10 22:29:48,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:29:48,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:48,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:29:48,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:29:48,910 INFO L87 Difference]: Start difference. First operand 703 states and 2542 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:48,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:48,997 INFO L93 Difference]: Finished difference Result 1033 states and 3563 transitions. [2021-03-10 22:29:48,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:29:48,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:48,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:49,005 INFO L225 Difference]: With dead ends: 1033 [2021-03-10 22:29:49,005 INFO L226 Difference]: Without dead ends: 949 [2021-03-10 22:29:49,006 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:29:49,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-03-10 22:29:49,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 628. [2021-03-10 22:29:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.5964912280701755) internal successors, (2255), 627 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2255 transitions. [2021-03-10 22:29:49,036 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2255 transitions. Word has length 24 [2021-03-10 22:29:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:49,037 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 2255 transitions. [2021-03-10 22:29:49,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2255 transitions. [2021-03-10 22:29:49,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:49,040 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:49,040 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:49,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:49,266 INFO L428 AbstractCegarLoop]: === Iteration 9 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:49,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:49,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1476649541, now seen corresponding path program 4 times [2021-03-10 22:29:49,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:49,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187657283] [2021-03-10 22:29:49,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:49,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187657283] [2021-03-10 22:29:49,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:49,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:29:49,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225719457] [2021-03-10 22:29:49,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:29:49,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:49,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:29:49,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:29:49,318 INFO L87 Difference]: Start difference. First operand 628 states and 2255 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:49,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:49,403 INFO L93 Difference]: Finished difference Result 847 states and 3018 transitions. [2021-03-10 22:29:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:29:49,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:49,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:49,409 INFO L225 Difference]: With dead ends: 847 [2021-03-10 22:29:49,409 INFO L226 Difference]: Without dead ends: 827 [2021-03-10 22:29:49,409 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:29:49,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-03-10 22:29:49,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 620. [2021-03-10 22:29:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.61389337641357) internal successors, (2237), 619 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2237 transitions. [2021-03-10 22:29:49,431 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2237 transitions. Word has length 24 [2021-03-10 22:29:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:49,432 INFO L480 AbstractCegarLoop]: Abstraction has 620 states and 2237 transitions. [2021-03-10 22:29:49,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2237 transitions. [2021-03-10 22:29:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:49,434 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:49,434 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:49,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 22:29:49,434 INFO L428 AbstractCegarLoop]: === Iteration 10 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:49,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:49,435 INFO L82 PathProgramCache]: Analyzing trace with hash 954675751, now seen corresponding path program 3 times [2021-03-10 22:29:49,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:49,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931094422] [2021-03-10 22:29:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:49,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931094422] [2021-03-10 22:29:49,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766814514] [2021-03-10 22:29:49,467 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 [2021-03-10 22:29:49,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:29:49,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:49,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:29:49,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:49,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:49,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 22:29:49,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766529645] [2021-03-10 22:29:49,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:29:49,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:49,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:29:49,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:29:49,646 INFO L87 Difference]: Start difference. First operand 620 states and 2237 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:49,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:49,728 INFO L93 Difference]: Finished difference Result 857 states and 3066 transitions. [2021-03-10 22:29:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:29:49,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:49,735 INFO L225 Difference]: With dead ends: 857 [2021-03-10 22:29:49,736 INFO L226 Difference]: Without dead ends: 857 [2021-03-10 22:29:49,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:29:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-03-10 22:29:49,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 548. [2021-03-10 22:29:49,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.579524680073126) internal successors, (1958), 547 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1958 transitions. [2021-03-10 22:29:49,761 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1958 transitions. Word has length 24 [2021-03-10 22:29:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:49,761 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 1958 transitions. [2021-03-10 22:29:49,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1958 transitions. [2021-03-10 22:29:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:49,764 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:49,764 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:49,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 22:29:49,991 INFO L428 AbstractCegarLoop]: === Iteration 11 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:49,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:49,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1922149633, now seen corresponding path program 5 times [2021-03-10 22:29:49,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:49,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314705249] [2021-03-10 22:29:49,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:50,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314705249] [2021-03-10 22:29:50,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:50,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:29:50,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142869703] [2021-03-10 22:29:50,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:29:50,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:50,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:29:50,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:29:50,020 INFO L87 Difference]: Start difference. First operand 548 states and 1958 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:50,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:50,098 INFO L93 Difference]: Finished difference Result 866 states and 3014 transitions. [2021-03-10 22:29:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:29:50,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:50,104 INFO L225 Difference]: With dead ends: 866 [2021-03-10 22:29:50,104 INFO L226 Difference]: Without dead ends: 842 [2021-03-10 22:29:50,104 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:29:50,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-03-10 22:29:50,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 608. [2021-03-10 22:29:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.602965403624382) internal successors, (2187), 607 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2187 transitions. [2021-03-10 22:29:50,131 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2187 transitions. Word has length 24 [2021-03-10 22:29:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:50,131 INFO L480 AbstractCegarLoop]: Abstraction has 608 states and 2187 transitions. [2021-03-10 22:29:50,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:50,131 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2187 transitions. [2021-03-10 22:29:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:50,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:50,134 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:50,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-10 22:29:50,134 INFO L428 AbstractCegarLoop]: === Iteration 12 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:50,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:50,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1932007235, now seen corresponding path program 4 times [2021-03-10 22:29:50,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:50,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917708115] [2021-03-10 22:29:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:50,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917708115] [2021-03-10 22:29:50,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524759926] [2021-03-10 22:29:50,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:50,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:50,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:50,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:29:50,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:50,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:50,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 22:29:50,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566557100] [2021-03-10 22:29:50,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:29:50,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:50,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:29:50,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:29:50,300 INFO L87 Difference]: Start difference. First operand 608 states and 2187 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:50,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:50,383 INFO L93 Difference]: Finished difference Result 825 states and 2855 transitions. [2021-03-10 22:29:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:29:50,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:50,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:50,389 INFO L225 Difference]: With dead ends: 825 [2021-03-10 22:29:50,389 INFO L226 Difference]: Without dead ends: 757 [2021-03-10 22:29:50,390 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:29:50,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-03-10 22:29:50,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 603. [2021-03-10 22:29:50,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 3.5930232558139537) internal successors, (2163), 602 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 2163 transitions. [2021-03-10 22:29:50,415 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 2163 transitions. Word has length 24 [2021-03-10 22:29:50,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:50,415 INFO L480 AbstractCegarLoop]: Abstraction has 603 states and 2163 transitions. [2021-03-10 22:29:50,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:50,416 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 2163 transitions. [2021-03-10 22:29:50,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:50,418 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:50,418 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:50,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:50,639 INFO L428 AbstractCegarLoop]: === Iteration 13 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1038354887, now seen corresponding path program 5 times [2021-03-10 22:29:50,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:50,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907901481] [2021-03-10 22:29:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:50,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907901481] [2021-03-10 22:29:50,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:50,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:29:50,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64883874] [2021-03-10 22:29:50,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:29:50,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:50,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:29:50,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:29:50,675 INFO L87 Difference]: Start difference. First operand 603 states and 2163 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:50,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:50,802 INFO L93 Difference]: Finished difference Result 985 states and 3379 transitions. [2021-03-10 22:29:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:29:50,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:50,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:50,810 INFO L225 Difference]: With dead ends: 985 [2021-03-10 22:29:50,810 INFO L226 Difference]: Without dead ends: 946 [2021-03-10 22:29:50,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:29:50,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-03-10 22:29:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 591. [2021-03-10 22:29:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.6) internal successors, (2124), 590 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:50,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 2124 transitions. [2021-03-10 22:29:50,836 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 2124 transitions. Word has length 24 [2021-03-10 22:29:50,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:50,837 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 2124 transitions. [2021-03-10 22:29:50,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:50,837 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 2124 transitions. [2021-03-10 22:29:50,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:50,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:50,839 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:50,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-10 22:29:50,840 INFO L428 AbstractCegarLoop]: === Iteration 14 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:50,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:50,840 INFO L82 PathProgramCache]: Analyzing trace with hash 641401677, now seen corresponding path program 6 times [2021-03-10 22:29:50,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:50,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072802954] [2021-03-10 22:29:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:50,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072802954] [2021-03-10 22:29:50,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525279443] [2021-03-10 22:29:50,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:50,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:29:50,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:50,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:29:50,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:51,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:51,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 22:29:51,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406720920] [2021-03-10 22:29:51,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:29:51,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:51,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:29:51,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:29:51,010 INFO L87 Difference]: Start difference. First operand 591 states and 2124 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:51,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:51,113 INFO L93 Difference]: Finished difference Result 783 states and 2748 transitions. [2021-03-10 22:29:51,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:29:51,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:51,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:51,119 INFO L225 Difference]: With dead ends: 783 [2021-03-10 22:29:51,120 INFO L226 Difference]: Without dead ends: 783 [2021-03-10 22:29:51,120 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:29:51,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-03-10 22:29:51,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 582. [2021-03-10 22:29:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 3.604130808950086) internal successors, (2094), 581 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:51,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 2094 transitions. [2021-03-10 22:29:51,143 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 2094 transitions. Word has length 24 [2021-03-10 22:29:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:51,143 INFO L480 AbstractCegarLoop]: Abstraction has 582 states and 2094 transitions. [2021-03-10 22:29:51,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:51,143 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 2094 transitions. [2021-03-10 22:29:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:51,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:51,145 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:51,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 22:29:51,367 INFO L428 AbstractCegarLoop]: === Iteration 15 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:51,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:51,368 INFO L82 PathProgramCache]: Analyzing trace with hash 831548115, now seen corresponding path program 6 times [2021-03-10 22:29:51,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:51,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625955946] [2021-03-10 22:29:51,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:51,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625955946] [2021-03-10 22:29:51,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:51,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:29:51,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925792039] [2021-03-10 22:29:51,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:29:51,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:51,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:29:51,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:29:51,394 INFO L87 Difference]: Start difference. First operand 582 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:51,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:51,471 INFO L93 Difference]: Finished difference Result 597 states and 2122 transitions. [2021-03-10 22:29:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:29:51,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:51,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:51,490 INFO L225 Difference]: With dead ends: 597 [2021-03-10 22:29:51,491 INFO L226 Difference]: Without dead ends: 565 [2021-03-10 22:29:51,491 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:29:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-03-10 22:29:51,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-03-10 22:29:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.6382978723404253) internal successors, (2052), 564 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:51,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 2052 transitions. [2021-03-10 22:29:51,515 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 2052 transitions. Word has length 24 [2021-03-10 22:29:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:51,515 INFO L480 AbstractCegarLoop]: Abstraction has 565 states and 2052 transitions. [2021-03-10 22:29:51,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 2052 transitions. [2021-03-10 22:29:51,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:51,517 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:51,517 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:51,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-10 22:29:51,518 INFO L428 AbstractCegarLoop]: === Iteration 16 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:51,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:51,519 INFO L82 PathProgramCache]: Analyzing trace with hash -293162627, now seen corresponding path program 7 times [2021-03-10 22:29:51,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:51,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686203753] [2021-03-10 22:29:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:51,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686203753] [2021-03-10 22:29:51,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264694513] [2021-03-10 22:29:51,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:51,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:29:51,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:51,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:51,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 22:29:51,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779193500] [2021-03-10 22:29:51,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:29:51,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:51,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:29:51,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:29:51,677 INFO L87 Difference]: Start difference. First operand 565 states and 2052 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:51,749 INFO L93 Difference]: Finished difference Result 595 states and 2146 transitions. [2021-03-10 22:29:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:29:51,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:51,752 INFO L225 Difference]: With dead ends: 595 [2021-03-10 22:29:51,752 INFO L226 Difference]: Without dead ends: 595 [2021-03-10 22:29:51,753 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:29:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-03-10 22:29:51,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 487. [2021-03-10 22:29:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.625514403292181) internal successors, (1762), 486 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1762 transitions. [2021-03-10 22:29:51,768 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1762 transitions. Word has length 24 [2021-03-10 22:29:51,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:51,768 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 1762 transitions. [2021-03-10 22:29:51,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:51,768 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1762 transitions. [2021-03-10 22:29:51,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:51,770 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:51,770 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:51,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:51,994 INFO L428 AbstractCegarLoop]: === Iteration 17 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:51,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:51,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1216404668, now seen corresponding path program 1 times [2021-03-10 22:29:51,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:51,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871734548] [2021-03-10 22:29:51,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:52,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871734548] [2021-03-10 22:29:52,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191085124] [2021-03-10 22:29:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:52,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:29:52,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:52,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:29:52,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-10 22:29:52,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:52,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:52,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:52,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:29:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:52,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:52,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:29:52,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538801366] [2021-03-10 22:29:52,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:29:52,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:52,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:29:52,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:29:52,657 INFO L87 Difference]: Start difference. First operand 487 states and 1762 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:53,138 INFO L93 Difference]: Finished difference Result 941 states and 3508 transitions. [2021-03-10 22:29:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:29:53,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:29:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:53,144 INFO L225 Difference]: With dead ends: 941 [2021-03-10 22:29:53,145 INFO L226 Difference]: Without dead ends: 860 [2021-03-10 22:29:53,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:29:53,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-03-10 22:29:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 547. [2021-03-10 22:29:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 3.6336996336996337) internal successors, (1984), 546 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1984 transitions. [2021-03-10 22:29:53,168 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1984 transitions. Word has length 26 [2021-03-10 22:29:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:53,169 INFO L480 AbstractCegarLoop]: Abstraction has 547 states and 1984 transitions. [2021-03-10 22:29:53,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:53,169 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1984 transitions. [2021-03-10 22:29:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:53,171 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:53,171 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:53,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 22:29:53,387 INFO L428 AbstractCegarLoop]: === Iteration 18 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:53,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:53,388 INFO L82 PathProgramCache]: Analyzing trace with hash 469022628, now seen corresponding path program 1 times [2021-03-10 22:29:53,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:53,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121712043] [2021-03-10 22:29:53,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:53,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121712043] [2021-03-10 22:29:53,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823650757] [2021-03-10 22:29:53,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:53,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:29:53,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:53,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:29:53,837 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 [2021-03-10 22:29:53,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:29:53,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:53,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:53,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:29:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:53,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:53,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:29:53,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27396819] [2021-03-10 22:29:53,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:29:53,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:53,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:29:53,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:29:53,901 INFO L87 Difference]: Start difference. First operand 547 states and 1984 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:54,382 INFO L93 Difference]: Finished difference Result 1017 states and 3788 transitions. [2021-03-10 22:29:54,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:29:54,382 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:29:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:54,390 INFO L225 Difference]: With dead ends: 1017 [2021-03-10 22:29:54,391 INFO L226 Difference]: Without dead ends: 936 [2021-03-10 22:29:54,391 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:29:54,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-03-10 22:29:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 569. [2021-03-10 22:29:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.653169014084507) internal successors, (2075), 568 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:54,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 2075 transitions. [2021-03-10 22:29:54,414 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 2075 transitions. Word has length 26 [2021-03-10 22:29:54,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:54,415 INFO L480 AbstractCegarLoop]: Abstraction has 569 states and 2075 transitions. [2021-03-10 22:29:54,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:54,415 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 2075 transitions. [2021-03-10 22:29:54,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:54,417 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:54,417 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:54,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 22:29:54,639 INFO L428 AbstractCegarLoop]: === Iteration 19 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:54,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:54,641 INFO L82 PathProgramCache]: Analyzing trace with hash -573555838, now seen corresponding path program 2 times [2021-03-10 22:29:54,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:54,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15679457] [2021-03-10 22:29:54,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:54,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15679457] [2021-03-10 22:29:54,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127721616] [2021-03-10 22:29:54,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:54,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:54,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:54,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:29:54,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:54,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:54,926 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 [2021-03-10 22:29:54,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:29:54,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:54,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:54,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:29:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:55,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:55,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:29:55,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86606363] [2021-03-10 22:29:55,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:55,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:55,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:55,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:55,109 INFO L87 Difference]: Start difference. First operand 569 states and 2075 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:56,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:56,454 INFO L93 Difference]: Finished difference Result 1392 states and 5274 transitions. [2021-03-10 22:29:56,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:29:56,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:29:56,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:56,461 INFO L225 Difference]: With dead ends: 1392 [2021-03-10 22:29:56,461 INFO L226 Difference]: Without dead ends: 1319 [2021-03-10 22:29:56,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 910.1ms TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:29:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-03-10 22:29:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 596. [2021-03-10 22:29:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.6621848739495797) internal successors, (2179), 595 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:56,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 2179 transitions. [2021-03-10 22:29:56,486 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 2179 transitions. Word has length 26 [2021-03-10 22:29:56,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:56,487 INFO L480 AbstractCegarLoop]: Abstraction has 596 states and 2179 transitions. [2021-03-10 22:29:56,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 2179 transitions. [2021-03-10 22:29:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:56,489 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:56,489 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:56,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:56,703 INFO L428 AbstractCegarLoop]: === Iteration 20 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:56,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:56,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1969142914, now seen corresponding path program 3 times [2021-03-10 22:29:56,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:56,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311309495] [2021-03-10 22:29:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:56,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311309495] [2021-03-10 22:29:56,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928040445] [2021-03-10 22:29:56,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:56,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:29:56,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:56,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:29:56,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:56,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:56,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 22:29:56,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:29:57,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:57,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:57,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:29:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:57,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:57,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:29:57,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025733912] [2021-03-10 22:29:57,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:57,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:57,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:57,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:57,151 INFO L87 Difference]: Start difference. First operand 596 states and 2179 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:58,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:58,647 INFO L93 Difference]: Finished difference Result 1450 states and 5515 transitions. [2021-03-10 22:29:58,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 22:29:58,648 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:29:58,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:58,654 INFO L225 Difference]: With dead ends: 1450 [2021-03-10 22:29:58,654 INFO L226 Difference]: Without dead ends: 1367 [2021-03-10 22:29:58,655 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1012.6ms TimeCoverageRelationStatistics Valid=319, Invalid=1241, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:29:58,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-03-10 22:29:58,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 594. [2021-03-10 22:29:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 3.6627318718381114) internal successors, (2172), 593 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 2172 transitions. [2021-03-10 22:29:58,690 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 2172 transitions. Word has length 26 [2021-03-10 22:29:58,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:58,690 INFO L480 AbstractCegarLoop]: Abstraction has 594 states and 2172 transitions. [2021-03-10 22:29:58,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:58,690 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 2172 transitions. [2021-03-10 22:29:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:58,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:58,692 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:58,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:58,908 INFO L428 AbstractCegarLoop]: === Iteration 21 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:58,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:58,908 INFO L82 PathProgramCache]: Analyzing trace with hash 730358562, now seen corresponding path program 2 times [2021-03-10 22:29:58,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:58,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265864746] [2021-03-10 22:29:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:59,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265864746] [2021-03-10 22:29:59,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576587546] [2021-03-10 22:29:59,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:59,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:59,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:59,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:29:59,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:59,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:59,194 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 [2021-03-10 22:29:59,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:29:59,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:29:59,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:29:59,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:29:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:59,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:59,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:29:59,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561915573] [2021-03-10 22:29:59,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:59,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:59,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:59,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:59,362 INFO L87 Difference]: Start difference. First operand 594 states and 2172 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:00,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:00,545 INFO L93 Difference]: Finished difference Result 2074 states and 7690 transitions. [2021-03-10 22:30:00,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 22:30:00,546 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:00,555 INFO L225 Difference]: With dead ends: 2074 [2021-03-10 22:30:00,555 INFO L226 Difference]: Without dead ends: 1801 [2021-03-10 22:30:00,556 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 876.3ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:30:00,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-03-10 22:30:00,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 663. [2021-03-10 22:30:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 3.7447129909365557) internal successors, (2479), 662 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 2479 transitions. [2021-03-10 22:30:00,591 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 2479 transitions. Word has length 26 [2021-03-10 22:30:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:00,591 INFO L480 AbstractCegarLoop]: Abstraction has 663 states and 2479 transitions. [2021-03-10 22:30:00,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 2479 transitions. [2021-03-10 22:30:00,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:00,594 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:00,594 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:00,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 22:30:00,812 INFO L428 AbstractCegarLoop]: === Iteration 22 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:00,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:00,813 INFO L82 PathProgramCache]: Analyzing trace with hash 197601580, now seen corresponding path program 3 times [2021-03-10 22:30:00,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:00,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435925078] [2021-03-10 22:30:00,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:30:00,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435925078] [2021-03-10 22:30:00,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207479090] [2021-03-10 22:30:00,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:01,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:30:01,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:01,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:30:01,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:01,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:01,085 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 [2021-03-10 22:30:01,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:01,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:01,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:01,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:30:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:01,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:01,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:30:01,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525828642] [2021-03-10 22:30:01,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:30:01,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:01,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:30:01,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:01,243 INFO L87 Difference]: Start difference. First operand 663 states and 2479 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:02,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:02,500 INFO L93 Difference]: Finished difference Result 2233 states and 8308 transitions. [2021-03-10 22:30:02,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:30:02,501 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:02,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:02,511 INFO L225 Difference]: With dead ends: 2233 [2021-03-10 22:30:02,511 INFO L226 Difference]: Without dead ends: 1961 [2021-03-10 22:30:02,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 925.4ms TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:30:02,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-03-10 22:30:02,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 704. [2021-03-10 22:30:02,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 3.8207681365576103) internal successors, (2686), 703 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 2686 transitions. [2021-03-10 22:30:02,555 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 2686 transitions. Word has length 26 [2021-03-10 22:30:02,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:02,557 INFO L480 AbstractCegarLoop]: Abstraction has 704 states and 2686 transitions. [2021-03-10 22:30:02,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 2686 transitions. [2021-03-10 22:30:02,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:02,561 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:02,561 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:02,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 22:30:02,775 INFO L428 AbstractCegarLoop]: === Iteration 23 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:02,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:02,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1995337340, now seen corresponding path program 1 times [2021-03-10 22:30:02,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:02,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685867920] [2021-03-10 22:30:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:02,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685867920] [2021-03-10 22:30:02,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365479755] [2021-03-10 22:30:02,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:02,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:02,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:03,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:03,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:30:03,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:03,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:03,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:03,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:30:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:03,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:03,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:03,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482903805] [2021-03-10 22:30:03,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:03,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:03,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:03,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:03,115 INFO L87 Difference]: Start difference. First operand 704 states and 2686 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:03,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:03,411 INFO L93 Difference]: Finished difference Result 1073 states and 4116 transitions. [2021-03-10 22:30:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:30:03,412 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:03,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:03,417 INFO L225 Difference]: With dead ends: 1073 [2021-03-10 22:30:03,417 INFO L226 Difference]: Without dead ends: 1000 [2021-03-10 22:30:03,417 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:03,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-03-10 22:30:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 731. [2021-03-10 22:30:03,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.8273972602739725) internal successors, (2794), 730 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:03,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2794 transitions. [2021-03-10 22:30:03,442 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2794 transitions. Word has length 26 [2021-03-10 22:30:03,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:03,442 INFO L480 AbstractCegarLoop]: Abstraction has 731 states and 2794 transitions. [2021-03-10 22:30:03,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:03,442 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2794 transitions. [2021-03-10 22:30:03,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:03,445 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:03,445 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:03,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 22:30:03,671 INFO L428 AbstractCegarLoop]: === Iteration 24 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:03,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:03,672 INFO L82 PathProgramCache]: Analyzing trace with hash -773558878, now seen corresponding path program 2 times [2021-03-10 22:30:03,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:03,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655721110] [2021-03-10 22:30:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:03,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655721110] [2021-03-10 22:30:03,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37700832] [2021-03-10 22:30:03,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:03,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:03,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:03,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:03,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:03,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:03,928 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 [2021-03-10 22:30:03,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:03,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:03,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:03,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-03-10 22:30:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:04,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:04,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:30:04,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296722080] [2021-03-10 22:30:04,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:04,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:04,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:04,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:04,113 INFO L87 Difference]: Start difference. First operand 731 states and 2794 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:04,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:04,933 INFO L93 Difference]: Finished difference Result 1158 states and 4457 transitions. [2021-03-10 22:30:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:30:04,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:04,938 INFO L225 Difference]: With dead ends: 1158 [2021-03-10 22:30:04,939 INFO L226 Difference]: Without dead ends: 1083 [2021-03-10 22:30:04,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 658.0ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:30:04,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-03-10 22:30:04,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 727. [2021-03-10 22:30:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.8264462809917354) internal successors, (2778), 726 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:04,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2778 transitions. [2021-03-10 22:30:04,965 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2778 transitions. Word has length 26 [2021-03-10 22:30:04,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:04,965 INFO L480 AbstractCegarLoop]: Abstraction has 727 states and 2778 transitions. [2021-03-10 22:30:04,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:04,965 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2778 transitions. [2021-03-10 22:30:04,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:04,968 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:04,968 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:05,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:05,191 INFO L428 AbstractCegarLoop]: === Iteration 25 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:05,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:05,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1010642212, now seen corresponding path program 1 times [2021-03-10 22:30:05,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:05,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949986036] [2021-03-10 22:30:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:05,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949986036] [2021-03-10 22:30:05,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057471023] [2021-03-10 22:30:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:05,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:05,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:05,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:05,432 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 [2021-03-10 22:30:05,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:05,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:05,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:05,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:30:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:05,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:05,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:05,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047865849] [2021-03-10 22:30:05,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:05,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:05,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:05,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:05,506 INFO L87 Difference]: Start difference. First operand 727 states and 2778 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:05,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:05,781 INFO L93 Difference]: Finished difference Result 1126 states and 4320 transitions. [2021-03-10 22:30:05,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:30:05,781 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:05,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:05,786 INFO L225 Difference]: With dead ends: 1126 [2021-03-10 22:30:05,786 INFO L226 Difference]: Without dead ends: 1044 [2021-03-10 22:30:05,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:05,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-03-10 22:30:05,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 738. [2021-03-10 22:30:05,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.8317503392130257) internal successors, (2824), 737 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2824 transitions. [2021-03-10 22:30:05,812 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2824 transitions. Word has length 26 [2021-03-10 22:30:05,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:05,812 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 2824 transitions. [2021-03-10 22:30:05,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:05,812 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2824 transitions. [2021-03-10 22:30:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:05,816 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:05,816 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:06,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 22:30:06,039 INFO L428 AbstractCegarLoop]: === Iteration 26 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:06,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:06,040 INFO L82 PathProgramCache]: Analyzing trace with hash -390158146, now seen corresponding path program 2 times [2021-03-10 22:30:06,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:06,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696597983] [2021-03-10 22:30:06,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:06,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696597983] [2021-03-10 22:30:06,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838745961] [2021-03-10 22:30:06,144 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 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 [2021-03-10 22:30:06,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:06,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:06,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:06,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:06,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:06,310 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 [2021-03-10 22:30:06,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:06,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:06,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:06,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-03-10 22:30:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:06,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:06,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:30:06,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506820451] [2021-03-10 22:30:06,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:06,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:06,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:06,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:06,472 INFO L87 Difference]: Start difference. First operand 738 states and 2824 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:07,251 INFO L93 Difference]: Finished difference Result 1204 states and 4625 transitions. [2021-03-10 22:30:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:30:07,252 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:07,255 INFO L225 Difference]: With dead ends: 1204 [2021-03-10 22:30:07,255 INFO L226 Difference]: Without dead ends: 1131 [2021-03-10 22:30:07,256 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 599.7ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:30:07,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-03-10 22:30:07,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 736. [2021-03-10 22:30:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.83265306122449) internal successors, (2817), 735 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:07,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2817 transitions. [2021-03-10 22:30:07,281 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2817 transitions. Word has length 26 [2021-03-10 22:30:07,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:07,281 INFO L480 AbstractCegarLoop]: Abstraction has 736 states and 2817 transitions. [2021-03-10 22:30:07,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2817 transitions. [2021-03-10 22:30:07,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:07,283 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:07,284 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:07,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:07,511 INFO L428 AbstractCegarLoop]: === Iteration 27 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1105227200, now seen corresponding path program 3 times [2021-03-10 22:30:07,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:07,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900431682] [2021-03-10 22:30:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:07,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900431682] [2021-03-10 22:30:07,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187999365] [2021-03-10 22:30:07,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:07,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:30:07,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:07,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:07,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:07,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:07,814 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 16 treesize of output 18 [2021-03-10 22:30:07,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:07,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:07,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:07,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-03-10 22:30:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:07,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:07,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:30:07,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558351545] [2021-03-10 22:30:07,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:07,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:07,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:07,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:07,948 INFO L87 Difference]: Start difference. First operand 736 states and 2817 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:08,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:08,741 INFO L93 Difference]: Finished difference Result 1194 states and 4592 transitions. [2021-03-10 22:30:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:30:08,742 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:08,747 INFO L225 Difference]: With dead ends: 1194 [2021-03-10 22:30:08,748 INFO L226 Difference]: Without dead ends: 1123 [2021-03-10 22:30:08,748 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 501.8ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:30:08,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-03-10 22:30:08,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 760. [2021-03-10 22:30:08,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.8194993412384717) internal successors, (2899), 759 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2899 transitions. [2021-03-10 22:30:08,774 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2899 transitions. Word has length 26 [2021-03-10 22:30:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:08,774 INFO L480 AbstractCegarLoop]: Abstraction has 760 states and 2899 transitions. [2021-03-10 22:30:08,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2899 transitions. [2021-03-10 22:30:08,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:08,776 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:08,777 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:08,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 22:30:08,997 INFO L428 AbstractCegarLoop]: === Iteration 28 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:08,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:08,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1970882652, now seen corresponding path program 3 times [2021-03-10 22:30:08,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:08,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20634845] [2021-03-10 22:30:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:09,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20634845] [2021-03-10 22:30:09,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145567146] [2021-03-10 22:30:09,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:09,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:30:09,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:09,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:09,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:09,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:09,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 22:30:09,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:09,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:09,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:09,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-03-10 22:30:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:09,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:09,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:30:09,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260534004] [2021-03-10 22:30:09,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:30:09,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:09,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:30:09,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:30:09,458 INFO L87 Difference]: Start difference. First operand 760 states and 2899 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:10,266 INFO L93 Difference]: Finished difference Result 1244 states and 4764 transitions. [2021-03-10 22:30:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:30:10,267 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:10,271 INFO L225 Difference]: With dead ends: 1244 [2021-03-10 22:30:10,271 INFO L226 Difference]: Without dead ends: 1173 [2021-03-10 22:30:10,271 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 618.7ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:30:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-03-10 22:30:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 736. [2021-03-10 22:30:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.83265306122449) internal successors, (2817), 735 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2817 transitions. [2021-03-10 22:30:10,298 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2817 transitions. Word has length 26 [2021-03-10 22:30:10,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:10,298 INFO L480 AbstractCegarLoop]: Abstraction has 736 states and 2817 transitions. [2021-03-10 22:30:10,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:10,298 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2817 transitions. [2021-03-10 22:30:10,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:10,300 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:10,300 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:10,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-03-10 22:30:10,515 INFO L428 AbstractCegarLoop]: === Iteration 29 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:10,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:10,516 INFO L82 PathProgramCache]: Analyzing trace with hash -248765392, now seen corresponding path program 4 times [2021-03-10 22:30:10,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:10,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097719297] [2021-03-10 22:30:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:10,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097719297] [2021-03-10 22:30:10,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738205145] [2021-03-10 22:30:10,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:10,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:10,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:10,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:10,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:10,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:10,754 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 [2021-03-10 22:30:10,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:10,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:10,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:10,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-03-10 22:30:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:10,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:10,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:10,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130307861] [2021-03-10 22:30:10,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:10,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:10,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:10,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:10,818 INFO L87 Difference]: Start difference. First operand 736 states and 2817 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:11,136 INFO L93 Difference]: Finished difference Result 1173 states and 4474 transitions. [2021-03-10 22:30:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:30:11,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:11,140 INFO L225 Difference]: With dead ends: 1173 [2021-03-10 22:30:11,140 INFO L226 Difference]: Without dead ends: 1100 [2021-03-10 22:30:11,140 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:11,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-03-10 22:30:11,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 772. [2021-03-10 22:30:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.8171206225680936) internal successors, (2943), 771 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2943 transitions. [2021-03-10 22:30:11,161 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2943 transitions. Word has length 26 [2021-03-10 22:30:11,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:11,161 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2943 transitions. [2021-03-10 22:30:11,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2943 transitions. [2021-03-10 22:30:11,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:11,165 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:11,165 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:11,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 22:30:11,367 INFO L428 AbstractCegarLoop]: === Iteration 30 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:11,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:11,368 INFO L82 PathProgramCache]: Analyzing trace with hash -959064550, now seen corresponding path program 4 times [2021-03-10 22:30:11,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:11,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925712582] [2021-03-10 22:30:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:11,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925712582] [2021-03-10 22:30:11,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147833823] [2021-03-10 22:30:11,455 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 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 [2021-03-10 22:30:11,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:11,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:11,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:11,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:11,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:11,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:30:11,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:11,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:11,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:11,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-03-10 22:30:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:11,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:11,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:11,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14274260] [2021-03-10 22:30:11,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:11,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:11,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:11,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:11,633 INFO L87 Difference]: Start difference. First operand 772 states and 2943 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:11,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:11,928 INFO L93 Difference]: Finished difference Result 1131 states and 4327 transitions. [2021-03-10 22:30:11,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:30:11,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:11,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:11,931 INFO L225 Difference]: With dead ends: 1131 [2021-03-10 22:30:11,931 INFO L226 Difference]: Without dead ends: 1058 [2021-03-10 22:30:11,932 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:11,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-03-10 22:30:11,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 772. [2021-03-10 22:30:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.8171206225680936) internal successors, (2943), 771 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:11,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2943 transitions. [2021-03-10 22:30:11,953 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2943 transitions. Word has length 26 [2021-03-10 22:30:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:11,953 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2943 transitions. [2021-03-10 22:30:11,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:11,954 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2943 transitions. [2021-03-10 22:30:11,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:11,956 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:11,957 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:12,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 22:30:12,167 INFO L428 AbstractCegarLoop]: === Iteration 31 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:12,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1223906964, now seen corresponding path program 5 times [2021-03-10 22:30:12,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:12,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838735292] [2021-03-10 22:30:12,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:12,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838735292] [2021-03-10 22:30:12,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341408417] [2021-03-10 22:30:12,253 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 [2021-03-10 22:30:12,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:12,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:12,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:12,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:12,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:12,354 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 [2021-03-10 22:30:12,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:12,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:12,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:12,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:30:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:12,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:12,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:12,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928029211] [2021-03-10 22:30:12,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:12,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:12,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:12,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:12,449 INFO L87 Difference]: Start difference. First operand 772 states and 2943 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:12,719 INFO L93 Difference]: Finished difference Result 1162 states and 4434 transitions. [2021-03-10 22:30:12,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:30:12,719 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:12,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:12,723 INFO L225 Difference]: With dead ends: 1162 [2021-03-10 22:30:12,723 INFO L226 Difference]: Without dead ends: 1089 [2021-03-10 22:30:12,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:12,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-03-10 22:30:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 781. [2021-03-10 22:30:12,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.8205128205128207) internal successors, (2980), 780 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2980 transitions. [2021-03-10 22:30:12,750 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2980 transitions. Word has length 26 [2021-03-10 22:30:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:12,751 INFO L480 AbstractCegarLoop]: Abstraction has 781 states and 2980 transitions. [2021-03-10 22:30:12,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2980 transitions. [2021-03-10 22:30:12,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:12,754 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:12,754 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:12,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:12,979 INFO L428 AbstractCegarLoop]: === Iteration 32 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:12,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:12,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1537433360, now seen corresponding path program 6 times [2021-03-10 22:30:12,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:12,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508694007] [2021-03-10 22:30:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:13,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508694007] [2021-03-10 22:30:13,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060367355] [2021-03-10 22:30:13,070 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 [2021-03-10 22:30:13,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:30:13,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:13,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:30:13,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:13,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:13,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 22:30:13,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:13,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:13,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:13,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:30:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:13,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:13,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:30:13,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205935441] [2021-03-10 22:30:13,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:30:13,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:13,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:30:13,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:13,349 INFO L87 Difference]: Start difference. First operand 781 states and 2980 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:14,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:14,308 INFO L93 Difference]: Finished difference Result 1321 states and 5044 transitions. [2021-03-10 22:30:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:30:14,309 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:14,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:14,312 INFO L225 Difference]: With dead ends: 1321 [2021-03-10 22:30:14,312 INFO L226 Difference]: Without dead ends: 1238 [2021-03-10 22:30:14,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 670.9ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:30:14,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-03-10 22:30:14,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 772. [2021-03-10 22:30:14,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.8171206225680936) internal successors, (2943), 771 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:14,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2943 transitions. [2021-03-10 22:30:14,333 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2943 transitions. Word has length 26 [2021-03-10 22:30:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:14,333 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2943 transitions. [2021-03-10 22:30:14,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2943 transitions. [2021-03-10 22:30:14,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:14,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:14,335 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:14,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:14,535 INFO L428 AbstractCegarLoop]: === Iteration 33 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:14,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:14,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1898034838, now seen corresponding path program 5 times [2021-03-10 22:30:14,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:14,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672020981] [2021-03-10 22:30:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:14,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672020981] [2021-03-10 22:30:14,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974595849] [2021-03-10 22:30:14,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:14,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:14,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:14,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:14,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:14,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:14,758 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 [2021-03-10 22:30:14,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:14,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:14,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:14,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:30:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:14,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:14,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:14,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283882405] [2021-03-10 22:30:14,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:14,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:14,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:14,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:14,831 INFO L87 Difference]: Start difference. First operand 772 states and 2943 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:15,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:15,071 INFO L93 Difference]: Finished difference Result 1118 states and 4279 transitions. [2021-03-10 22:30:15,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:30:15,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:15,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:15,074 INFO L225 Difference]: With dead ends: 1118 [2021-03-10 22:30:15,074 INFO L226 Difference]: Without dead ends: 1045 [2021-03-10 22:30:15,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:15,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-03-10 22:30:15,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 781. [2021-03-10 22:30:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.821794871794872) internal successors, (2981), 780 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2981 transitions. [2021-03-10 22:30:15,092 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2981 transitions. Word has length 26 [2021-03-10 22:30:15,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:15,092 INFO L480 AbstractCegarLoop]: Abstraction has 781 states and 2981 transitions. [2021-03-10 22:30:15,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:15,092 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2981 transitions. [2021-03-10 22:30:15,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:15,095 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:15,095 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:15,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-03-10 22:30:15,298 INFO L428 AbstractCegarLoop]: === Iteration 34 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:15,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:15,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1441749820, now seen corresponding path program 6 times [2021-03-10 22:30:15,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:15,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100425568] [2021-03-10 22:30:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:15,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100425568] [2021-03-10 22:30:15,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151913672] [2021-03-10 22:30:15,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:15,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:30:15,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:15,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:30:15,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:15,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:15,522 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 [2021-03-10 22:30:15,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:15,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:15,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:15,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:30:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:15,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:15,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:30:15,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149249839] [2021-03-10 22:30:15,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:30:15,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:15,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:30:15,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:15,680 INFO L87 Difference]: Start difference. First operand 781 states and 2981 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:16,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:16,518 INFO L93 Difference]: Finished difference Result 1254 states and 4780 transitions. [2021-03-10 22:30:16,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:30:16,518 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:16,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:16,521 INFO L225 Difference]: With dead ends: 1254 [2021-03-10 22:30:16,521 INFO L226 Difference]: Without dead ends: 1179 [2021-03-10 22:30:16,522 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 632.4ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:30:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-03-10 22:30:16,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 772. [2021-03-10 22:30:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.8171206225680936) internal successors, (2943), 771 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:16,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2943 transitions. [2021-03-10 22:30:16,540 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2943 transitions. Word has length 26 [2021-03-10 22:30:16,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:16,541 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2943 transitions. [2021-03-10 22:30:16,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:16,541 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2943 transitions. [2021-03-10 22:30:16,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:16,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:16,543 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:16,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:16,759 INFO L428 AbstractCegarLoop]: === Iteration 35 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:16,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:16,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1317477424, now seen corresponding path program 4 times [2021-03-10 22:30:16,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:16,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19203956] [2021-03-10 22:30:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:16,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19203956] [2021-03-10 22:30:16,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244875981] [2021-03-10 22:30:16,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:16,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:16,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:16,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:16,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:17,000 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 [2021-03-10 22:30:17,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:17,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:17,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:17,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-03-10 22:30:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:17,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:17,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:17,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303058507] [2021-03-10 22:30:17,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:17,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:17,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:17,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:17,069 INFO L87 Difference]: Start difference. First operand 772 states and 2943 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:17,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:17,510 INFO L93 Difference]: Finished difference Result 1441 states and 5439 transitions. [2021-03-10 22:30:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:30:17,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:17,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:17,514 INFO L225 Difference]: With dead ends: 1441 [2021-03-10 22:30:17,514 INFO L226 Difference]: Without dead ends: 1350 [2021-03-10 22:30:17,514 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:30:17,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-03-10 22:30:17,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 850. [2021-03-10 22:30:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.872791519434629) internal successors, (3288), 849 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 3288 transitions. [2021-03-10 22:30:17,535 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 3288 transitions. Word has length 26 [2021-03-10 22:30:17,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:17,535 INFO L480 AbstractCegarLoop]: Abstraction has 850 states and 3288 transitions. [2021-03-10 22:30:17,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:17,535 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 3288 transitions. [2021-03-10 22:30:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:17,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:17,537 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:17,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 22:30:17,738 INFO L428 AbstractCegarLoop]: === Iteration 36 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:17,739 INFO L82 PathProgramCache]: Analyzing trace with hash -2027776582, now seen corresponding path program 4 times [2021-03-10 22:30:17,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:17,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782611245] [2021-03-10 22:30:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:17,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782611245] [2021-03-10 22:30:17,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007287811] [2021-03-10 22:30:17,855 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 [2021-03-10 22:30:17,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:17,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:17,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:17,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:17,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:17,971 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 [2021-03-10 22:30:17,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:17,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:17,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:17,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-03-10 22:30:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:18,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:18,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:18,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881311346] [2021-03-10 22:30:18,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:18,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:18,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:18,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:18,038 INFO L87 Difference]: Start difference. First operand 850 states and 3288 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:18,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:18,311 INFO L93 Difference]: Finished difference Result 1248 states and 4823 transitions. [2021-03-10 22:30:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:30:18,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:18,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:18,315 INFO L225 Difference]: With dead ends: 1248 [2021-03-10 22:30:18,315 INFO L226 Difference]: Without dead ends: 1166 [2021-03-10 22:30:18,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:18,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-03-10 22:30:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 826. [2021-03-10 22:30:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.896969696969697) internal successors, (3215), 825 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 3215 transitions. [2021-03-10 22:30:18,337 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 3215 transitions. Word has length 26 [2021-03-10 22:30:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:18,337 INFO L480 AbstractCegarLoop]: Abstraction has 826 states and 3215 transitions. [2021-03-10 22:30:18,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 3215 transitions. [2021-03-10 22:30:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:18,340 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:18,340 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:18,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-10 22:30:18,555 INFO L428 AbstractCegarLoop]: === Iteration 37 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:18,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:18,555 INFO L82 PathProgramCache]: Analyzing trace with hash -177742916, now seen corresponding path program 5 times [2021-03-10 22:30:18,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:18,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178778486] [2021-03-10 22:30:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:18,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178778486] [2021-03-10 22:30:18,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685981700] [2021-03-10 22:30:18,665 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 [2021-03-10 22:30:18,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:30:18,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:18,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:18,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:18,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:18,787 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 [2021-03-10 22:30:18,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:18,807 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.9 percent of original size [2021-03-10 22:30:18,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:18,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:13 [2021-03-10 22:30:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:18,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:18,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:30:18,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128479999] [2021-03-10 22:30:18,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:18,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:18,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:18,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:18,863 INFO L87 Difference]: Start difference. First operand 826 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:19,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:19,316 INFO L93 Difference]: Finished difference Result 1332 states and 5148 transitions. [2021-03-10 22:30:19,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:30:19,316 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:19,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:19,319 INFO L225 Difference]: With dead ends: 1332 [2021-03-10 22:30:19,319 INFO L226 Difference]: Without dead ends: 1241 [2021-03-10 22:30:19,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-03-10 22:30:19,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 844. [2021-03-10 22:30:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.9383155397390275) internal successors, (3320), 843 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 3320 transitions. [2021-03-10 22:30:19,343 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 3320 transitions. Word has length 26 [2021-03-10 22:30:19,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:19,343 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 3320 transitions. [2021-03-10 22:30:19,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:19,343 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 3320 transitions. [2021-03-10 22:30:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:19,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:19,346 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:19,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-10 22:30:19,559 INFO L428 AbstractCegarLoop]: === Iteration 38 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:19,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1790221484, now seen corresponding path program 6 times [2021-03-10 22:30:19,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:19,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77198339] [2021-03-10 22:30:19,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:19,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77198339] [2021-03-10 22:30:19,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295986228] [2021-03-10 22:30:19,680 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 [2021-03-10 22:30:19,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:30:19,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:19,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:30:19,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:19,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:19,793 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 [2021-03-10 22:30:19,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:19,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:19,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:19,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-03-10 22:30:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:19,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:19,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 22:30:19,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91615871] [2021-03-10 22:30:19,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:30:19,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:19,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:30:19,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:30:19,928 INFO L87 Difference]: Start difference. First operand 844 states and 3320 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:20,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:20,971 INFO L93 Difference]: Finished difference Result 1842 states and 7162 transitions. [2021-03-10 22:30:20,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:30:20,971 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:20,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:20,975 INFO L225 Difference]: With dead ends: 1842 [2021-03-10 22:30:20,975 INFO L226 Difference]: Without dead ends: 1679 [2021-03-10 22:30:20,976 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 755.2ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:30:20,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2021-03-10 22:30:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 868. [2021-03-10 22:30:20,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-03-10 22:30:20,997 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-03-10 22:30:20,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:20,997 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-03-10 22:30:20,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-03-10 22:30:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:21,008 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:21,009 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:21,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 22:30:21,212 INFO L428 AbstractCegarLoop]: === Iteration 39 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:21,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:21,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1647634560, now seen corresponding path program 5 times [2021-03-10 22:30:21,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:21,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957598670] [2021-03-10 22:30:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:21,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957598670] [2021-03-10 22:30:21,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579180808] [2021-03-10 22:30:21,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:21,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:21,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:21,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:21,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:21,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:21,408 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:30:21,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:21,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:21,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:21,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:30:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:21,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:21,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:21,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643408063] [2021-03-10 22:30:21,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:21,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:21,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:21,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:21,483 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:21,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:21,754 INFO L93 Difference]: Finished difference Result 1245 states and 4905 transitions. [2021-03-10 22:30:21,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:30:21,755 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:21,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:21,758 INFO L225 Difference]: With dead ends: 1245 [2021-03-10 22:30:21,758 INFO L226 Difference]: Without dead ends: 1163 [2021-03-10 22:30:21,759 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:21,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-03-10 22:30:21,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 877. [2021-03-10 22:30:21,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.9817351598173514) internal successors, (3488), 876 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3488 transitions. [2021-03-10 22:30:21,779 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3488 transitions. Word has length 26 [2021-03-10 22:30:21,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:21,779 INFO L480 AbstractCegarLoop]: Abstraction has 877 states and 3488 transitions. [2021-03-10 22:30:21,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:21,779 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3488 transitions. [2021-03-10 22:30:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:21,782 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:21,782 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:21,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:21,995 INFO L428 AbstractCegarLoop]: === Iteration 40 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:21,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:21,996 INFO L82 PathProgramCache]: Analyzing trace with hash -881304204, now seen corresponding path program 6 times [2021-03-10 22:30:21,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:21,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963514919] [2021-03-10 22:30:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:22,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963514919] [2021-03-10 22:30:22,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456060408] [2021-03-10 22:30:22,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:22,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:30:22,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:22,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:30:22,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:22,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:22,187 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 [2021-03-10 22:30:22,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:22,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:22,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:22,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-03-10 22:30:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:22,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:22,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 22:30:22,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321305719] [2021-03-10 22:30:22,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:30:22,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:22,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:30:22,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:30:22,302 INFO L87 Difference]: Start difference. First operand 877 states and 3488 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:23,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:23,629 INFO L93 Difference]: Finished difference Result 1631 states and 6370 transitions. [2021-03-10 22:30:23,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 22:30:23,630 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:23,634 INFO L225 Difference]: With dead ends: 1631 [2021-03-10 22:30:23,634 INFO L226 Difference]: Without dead ends: 1558 [2021-03-10 22:30:23,635 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 995.5ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:30:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2021-03-10 22:30:23,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 868. [2021-03-10 22:30:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-03-10 22:30:23,663 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-03-10 22:30:23,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:23,663 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-03-10 22:30:23,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:23,664 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-03-10 22:30:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:23,666 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:23,666 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:23,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:23,866 INFO L428 AbstractCegarLoop]: === Iteration 41 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:23,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1976988362, now seen corresponding path program 7 times [2021-03-10 22:30:23,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:23,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845360479] [2021-03-10 22:30:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:24,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845360479] [2021-03-10 22:30:24,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284037885] [2021-03-10 22:30:24,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:24,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:24,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:24,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:24,169 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 [2021-03-10 22:30:24,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:24,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:24,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:24,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:30:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:24,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:24,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:30:24,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785671114] [2021-03-10 22:30:24,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:24,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:24,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:24,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:24,219 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:24,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:24,579 INFO L93 Difference]: Finished difference Result 1431 states and 5615 transitions. [2021-03-10 22:30:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:30:24,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:24,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:24,583 INFO L225 Difference]: With dead ends: 1431 [2021-03-10 22:30:24,583 INFO L226 Difference]: Without dead ends: 1350 [2021-03-10 22:30:24,584 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 273.3ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:30:24,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-03-10 22:30:24,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 910. [2021-03-10 22:30:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.957095709570957) internal successors, (3597), 909 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3597 transitions. [2021-03-10 22:30:24,604 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3597 transitions. Word has length 26 [2021-03-10 22:30:24,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:24,604 INFO L480 AbstractCegarLoop]: Abstraction has 910 states and 3597 transitions. [2021-03-10 22:30:24,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:24,604 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3597 transitions. [2021-03-10 22:30:24,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:24,606 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:24,606 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:24,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:24,807 INFO L428 AbstractCegarLoop]: === Iteration 42 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:24,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:24,807 INFO L82 PathProgramCache]: Analyzing trace with hash -632551638, now seen corresponding path program 7 times [2021-03-10 22:30:24,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:24,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569246896] [2021-03-10 22:30:24,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:24,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569246896] [2021-03-10 22:30:24,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969165904] [2021-03-10 22:30:24,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:24,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:24,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:25,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:25,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 22:30:25,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:25,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:25,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:25,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:30:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:25,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:25,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:30:25,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109182132] [2021-03-10 22:30:25,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:25,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:25,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:25,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:25,165 INFO L87 Difference]: Start difference. First operand 910 states and 3597 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:25,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:25,616 INFO L93 Difference]: Finished difference Result 1481 states and 5795 transitions. [2021-03-10 22:30:25,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:30:25,617 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:25,621 INFO L225 Difference]: With dead ends: 1481 [2021-03-10 22:30:25,621 INFO L226 Difference]: Without dead ends: 1400 [2021-03-10 22:30:25,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:30:25,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-03-10 22:30:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 880. [2021-03-10 22:30:25,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.973833902161547) internal successors, (3493), 879 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3493 transitions. [2021-03-10 22:30:25,640 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3493 transitions. Word has length 26 [2021-03-10 22:30:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:25,640 INFO L480 AbstractCegarLoop]: Abstraction has 880 states and 3493 transitions. [2021-03-10 22:30:25,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3493 transitions. [2021-03-10 22:30:25,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:25,642 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:25,642 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:25,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-10 22:30:25,843 INFO L428 AbstractCegarLoop]: === Iteration 43 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:25,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:25,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1675130104, now seen corresponding path program 8 times [2021-03-10 22:30:25,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:25,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000315726] [2021-03-10 22:30:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:25,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000315726] [2021-03-10 22:30:25,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570007330] [2021-03-10 22:30:25,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:25,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:25,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:25,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:30:25,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:26,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:26,047 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 [2021-03-10 22:30:26,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:26,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:26,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:26,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:30:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:26,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:26,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:30:26,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930849661] [2021-03-10 22:30:26,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:30:26,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:26,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:30:26,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:26,187 INFO L87 Difference]: Start difference. First operand 880 states and 3493 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:27,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:27,496 INFO L93 Difference]: Finished difference Result 1684 states and 6608 transitions. [2021-03-10 22:30:27,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:30:27,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:27,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:27,501 INFO L225 Difference]: With dead ends: 1684 [2021-03-10 22:30:27,501 INFO L226 Difference]: Without dead ends: 1611 [2021-03-10 22:30:27,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:30:27,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-03-10 22:30:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 889. [2021-03-10 22:30:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.975225225225225) internal successors, (3530), 888 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3530 transitions. [2021-03-10 22:30:27,522 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3530 transitions. Word has length 26 [2021-03-10 22:30:27,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:27,522 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 3530 transitions. [2021-03-10 22:30:27,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:27,522 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3530 transitions. [2021-03-10 22:30:27,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:27,524 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:27,525 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:27,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:27,728 INFO L428 AbstractCegarLoop]: === Iteration 44 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:27,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1224250116, now seen corresponding path program 9 times [2021-03-10 22:30:27,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:27,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501464036] [2021-03-10 22:30:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:27,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501464036] [2021-03-10 22:30:27,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597962726] [2021-03-10 22:30:27,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:27,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:30:27,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:27,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:30:27,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:27,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:27,970 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 [2021-03-10 22:30:27,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:27,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:27,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:27,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:30:28,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:28,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:28,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:30:28,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825190991] [2021-03-10 22:30:28,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:30:28,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:28,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:30:28,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:28,148 INFO L87 Difference]: Start difference. First operand 889 states and 3530 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:29,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:29,342 INFO L93 Difference]: Finished difference Result 1684 states and 6639 transitions. [2021-03-10 22:30:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 22:30:29,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:29,347 INFO L225 Difference]: With dead ends: 1684 [2021-03-10 22:30:29,347 INFO L226 Difference]: Without dead ends: 1601 [2021-03-10 22:30:29,347 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 915.7ms TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:30:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-03-10 22:30:29,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 880. [2021-03-10 22:30:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.973833902161547) internal successors, (3493), 879 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3493 transitions. [2021-03-10 22:30:29,368 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3493 transitions. Word has length 26 [2021-03-10 22:30:29,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:29,368 INFO L480 AbstractCegarLoop]: Abstraction has 880 states and 3493 transitions. [2021-03-10 22:30:29,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3493 transitions. [2021-03-10 22:30:29,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:29,370 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:29,371 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:29,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-10 22:30:29,571 INFO L428 AbstractCegarLoop]: === Iteration 45 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:29,572 INFO L82 PathProgramCache]: Analyzing trace with hash -371215704, now seen corresponding path program 8 times [2021-03-10 22:30:29,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:29,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196058837] [2021-03-10 22:30:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:29,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196058837] [2021-03-10 22:30:29,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218573005] [2021-03-10 22:30:29,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:29,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:29,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:29,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:30:29,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:29,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:29,839 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 [2021-03-10 22:30:29,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:29,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:29,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:29,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:30:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:30,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:30,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:30:30,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244964636] [2021-03-10 22:30:30,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:30:30,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:30,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:30:30,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:30:30,005 INFO L87 Difference]: Start difference. First operand 880 states and 3493 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:31,497 INFO L93 Difference]: Finished difference Result 2501 states and 9470 transitions. [2021-03-10 22:30:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 22:30:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:31,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:31,504 INFO L225 Difference]: With dead ends: 2501 [2021-03-10 22:30:31,505 INFO L226 Difference]: Without dead ends: 2228 [2021-03-10 22:30:31,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1096.3ms TimeCoverageRelationStatistics Valid=363, Invalid=1529, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:30:31,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-03-10 22:30:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 886. [2021-03-10 22:30:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.977401129943503) internal successors, (3520), 885 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3520 transitions. [2021-03-10 22:30:31,529 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3520 transitions. Word has length 26 [2021-03-10 22:30:31,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:31,530 INFO L480 AbstractCegarLoop]: Abstraction has 886 states and 3520 transitions. [2021-03-10 22:30:31,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3520 transitions. [2021-03-10 22:30:31,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:31,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:31,532 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:31,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:31,733 INFO L428 AbstractCegarLoop]: === Iteration 46 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:31,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:31,733 INFO L82 PathProgramCache]: Analyzing trace with hash -903972686, now seen corresponding path program 9 times [2021-03-10 22:30:31,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:31,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767430840] [2021-03-10 22:30:31,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:31,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767430840] [2021-03-10 22:30:31,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218712469] [2021-03-10 22:30:31,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:31,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:30:31,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:31,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:30:31,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:32,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:32,010 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 [2021-03-10 22:30:32,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:32,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:32,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:32,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:30:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:32,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:32,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:30:32,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638180887] [2021-03-10 22:30:32,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:30:32,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:32,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:30:32,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:30:32,179 INFO L87 Difference]: Start difference. First operand 886 states and 3520 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:33,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:33,721 INFO L93 Difference]: Finished difference Result 2590 states and 9786 transitions. [2021-03-10 22:30:33,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 22:30:33,721 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:33,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:33,727 INFO L225 Difference]: With dead ends: 2590 [2021-03-10 22:30:33,727 INFO L226 Difference]: Without dead ends: 2318 [2021-03-10 22:30:33,728 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1160.0ms TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:30:33,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-03-10 22:30:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 871. [2021-03-10 22:30:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.9770114942528734) internal successors, (3460), 870 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 3460 transitions. [2021-03-10 22:30:33,753 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 3460 transitions. Word has length 26 [2021-03-10 22:30:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:33,753 INFO L480 AbstractCegarLoop]: Abstraction has 871 states and 3460 transitions. [2021-03-10 22:30:33,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:33,753 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 3460 transitions. [2021-03-10 22:30:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:33,755 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:33,755 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:33,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:33,956 INFO L428 AbstractCegarLoop]: === Iteration 47 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:33,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:33,956 INFO L82 PathProgramCache]: Analyzing trace with hash 2100006690, now seen corresponding path program 10 times [2021-03-10 22:30:33,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:33,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885541934] [2021-03-10 22:30:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:34,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885541934] [2021-03-10 22:30:34,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994159644] [2021-03-10 22:30:34,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:34,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:34,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:34,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:34,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:34,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:34,231 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 [2021-03-10 22:30:34,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:34,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:34,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:34,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:30:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:34,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:34,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:30:34,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209665757] [2021-03-10 22:30:34,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:34,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:34,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:34,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:34,282 INFO L87 Difference]: Start difference. First operand 871 states and 3460 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:34,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:34,928 INFO L93 Difference]: Finished difference Result 1975 states and 7789 transitions. [2021-03-10 22:30:34,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:30:34,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:34,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:34,933 INFO L225 Difference]: With dead ends: 1975 [2021-03-10 22:30:34,933 INFO L226 Difference]: Without dead ends: 1894 [2021-03-10 22:30:34,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 293.6ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:34,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-03-10 22:30:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 911. [2021-03-10 22:30:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.9472527472527474) internal successors, (3592), 910 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:34,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3592 transitions. [2021-03-10 22:30:34,955 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3592 transitions. Word has length 26 [2021-03-10 22:30:34,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:34,956 INFO L480 AbstractCegarLoop]: Abstraction has 911 states and 3592 transitions. [2021-03-10 22:30:34,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:34,956 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3592 transitions. [2021-03-10 22:30:34,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:34,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:34,958 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:35,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-03-10 22:30:35,158 INFO L428 AbstractCegarLoop]: === Iteration 48 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:35,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:35,159 INFO L82 PathProgramCache]: Analyzing trace with hash -509533310, now seen corresponding path program 10 times [2021-03-10 22:30:35,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:35,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376841354] [2021-03-10 22:30:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:35,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376841354] [2021-03-10 22:30:35,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143814796] [2021-03-10 22:30:35,272 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 [2021-03-10 22:30:35,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:35,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:35,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:35,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:35,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:35,472 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 [2021-03-10 22:30:35,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:35,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:35,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:35,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:30:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:35,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:35,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:30:35,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248471613] [2021-03-10 22:30:35,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:35,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:35,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:35,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:35,528 INFO L87 Difference]: Start difference. First operand 911 states and 3592 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:36,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:36,126 INFO L93 Difference]: Finished difference Result 2026 states and 7973 transitions. [2021-03-10 22:30:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:30:36,127 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:36,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:36,132 INFO L225 Difference]: With dead ends: 2026 [2021-03-10 22:30:36,132 INFO L226 Difference]: Without dead ends: 1945 [2021-03-10 22:30:36,133 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 306.1ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-03-10 22:30:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 881. [2021-03-10 22:30:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.963636363636364) internal successors, (3488), 880 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:36,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 3488 transitions. [2021-03-10 22:30:36,156 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 3488 transitions. Word has length 26 [2021-03-10 22:30:36,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:36,157 INFO L480 AbstractCegarLoop]: Abstraction has 881 states and 3488 transitions. [2021-03-10 22:30:36,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:36,157 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 3488 transitions. [2021-03-10 22:30:36,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:36,159 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:36,159 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:36,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:36,359 INFO L428 AbstractCegarLoop]: === Iteration 49 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:36,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:36,360 INFO L82 PathProgramCache]: Analyzing trace with hash -203283562, now seen corresponding path program 7 times [2021-03-10 22:30:36,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:36,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529373042] [2021-03-10 22:30:36,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:36,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529373042] [2021-03-10 22:30:36,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262187524] [2021-03-10 22:30:36,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:36,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:36,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:36,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:36,589 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 [2021-03-10 22:30:36,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:36,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:36,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:36,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:30:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:36,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:36,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:36,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364754327] [2021-03-10 22:30:36,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:36,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:36,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:36,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:36,664 INFO L87 Difference]: Start difference. First operand 881 states and 3488 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:37,110 INFO L93 Difference]: Finished difference Result 1346 states and 5309 transitions. [2021-03-10 22:30:37,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:30:37,110 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:37,114 INFO L225 Difference]: With dead ends: 1346 [2021-03-10 22:30:37,114 INFO L226 Difference]: Without dead ends: 1273 [2021-03-10 22:30:37,114 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:30:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-03-10 22:30:37,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 902. [2021-03-10 22:30:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.9644839067702553) internal successors, (3572), 901 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:37,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3572 transitions. [2021-03-10 22:30:37,132 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3572 transitions. Word has length 26 [2021-03-10 22:30:37,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:37,132 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 3572 transitions. [2021-03-10 22:30:37,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:37,132 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3572 transitions. [2021-03-10 22:30:37,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:37,134 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:37,134 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:37,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-03-10 22:30:37,339 INFO L428 AbstractCegarLoop]: === Iteration 50 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:37,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:37,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1322787516, now seen corresponding path program 8 times [2021-03-10 22:30:37,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:37,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841946361] [2021-03-10 22:30:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:37,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841946361] [2021-03-10 22:30:37,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554471673] [2021-03-10 22:30:37,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:37,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:37,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:37,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:37,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:37,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:37,572 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 [2021-03-10 22:30:37,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:37,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:37,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:37,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:30:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:37,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:37,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:37,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671206425] [2021-03-10 22:30:37,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:37,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:37,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:37,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:37,639 INFO L87 Difference]: Start difference. First operand 902 states and 3572 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:37,941 INFO L93 Difference]: Finished difference Result 1342 states and 5292 transitions. [2021-03-10 22:30:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:30:37,942 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:37,945 INFO L225 Difference]: With dead ends: 1342 [2021-03-10 22:30:37,945 INFO L226 Difference]: Without dead ends: 1267 [2021-03-10 22:30:37,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 224.7ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:30:37,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-03-10 22:30:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 893. [2021-03-10 22:30:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.9618834080717487) internal successors, (3534), 892 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3534 transitions. [2021-03-10 22:30:37,963 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3534 transitions. Word has length 26 [2021-03-10 22:30:37,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:37,963 INFO L480 AbstractCegarLoop]: Abstraction has 893 states and 3534 transitions. [2021-03-10 22:30:37,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:37,963 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3534 transitions. [2021-03-10 22:30:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:37,965 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:37,965 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:38,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:38,166 INFO L428 AbstractCegarLoop]: === Iteration 51 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:38,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1085704182, now seen corresponding path program 7 times [2021-03-10 22:30:38,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:38,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662264844] [2021-03-10 22:30:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:38,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662264844] [2021-03-10 22:30:38,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258778681] [2021-03-10 22:30:38,250 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 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 [2021-03-10 22:30:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:38,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:38,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:38,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:38,394 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 [2021-03-10 22:30:38,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:38,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:38,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:38,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:30:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:38,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:38,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:38,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606351243] [2021-03-10 22:30:38,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:38,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:38,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:38,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:38,472 INFO L87 Difference]: Start difference. First operand 893 states and 3534 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:38,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:38,939 INFO L93 Difference]: Finished difference Result 1390 states and 5478 transitions. [2021-03-10 22:30:38,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:30:38,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:38,943 INFO L225 Difference]: With dead ends: 1390 [2021-03-10 22:30:38,943 INFO L226 Difference]: Without dead ends: 1308 [2021-03-10 22:30:38,943 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:30:38,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-03-10 22:30:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 902. [2021-03-10 22:30:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.9633740288568258) internal successors, (3571), 901 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3571 transitions. [2021-03-10 22:30:38,968 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3571 transitions. Word has length 26 [2021-03-10 22:30:38,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:38,969 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 3571 transitions. [2021-03-10 22:30:38,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3571 transitions. [2021-03-10 22:30:38,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:38,972 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:38,972 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:39,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-03-10 22:30:39,187 INFO L428 AbstractCegarLoop]: === Iteration 52 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:39,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1706188248, now seen corresponding path program 8 times [2021-03-10 22:30:39,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:39,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916137323] [2021-03-10 22:30:39,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:39,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916137323] [2021-03-10 22:30:39,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511201488] [2021-03-10 22:30:39,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:39,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:39,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:39,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:39,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:39,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:39,432 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 [2021-03-10 22:30:39,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:39,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:39,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:39,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-03-10 22:30:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:39,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:39,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:30:39,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187148404] [2021-03-10 22:30:39,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:39,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:39,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:39,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:39,628 INFO L87 Difference]: Start difference. First operand 902 states and 3571 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:40,500 INFO L93 Difference]: Finished difference Result 1438 states and 5653 transitions. [2021-03-10 22:30:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:30:40,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:40,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:40,504 INFO L225 Difference]: With dead ends: 1438 [2021-03-10 22:30:40,504 INFO L226 Difference]: Without dead ends: 1365 [2021-03-10 22:30:40,504 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 653.9ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:30:40,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-03-10 22:30:40,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 893. [2021-03-10 22:30:40,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.9618834080717487) internal successors, (3534), 892 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:40,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3534 transitions. [2021-03-10 22:30:40,525 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3534 transitions. Word has length 26 [2021-03-10 22:30:40,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:40,526 INFO L480 AbstractCegarLoop]: Abstraction has 893 states and 3534 transitions. [2021-03-10 22:30:40,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:40,526 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3534 transitions. [2021-03-10 22:30:40,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:40,528 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:40,528 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:40,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:40,740 INFO L428 AbstractCegarLoop]: === Iteration 53 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:40,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:40,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1093393702, now seen corresponding path program 9 times [2021-03-10 22:30:40,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:40,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101328250] [2021-03-10 22:30:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:40,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101328250] [2021-03-10 22:30:40,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241674732] [2021-03-10 22:30:40,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:40,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:30:40,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:40,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:40,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:41,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:41,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 22:30:41,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:41,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:41,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:41,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-03-10 22:30:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:41,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:41,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:30:41,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352520774] [2021-03-10 22:30:41,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:41,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:41,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:41,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:41,203 INFO L87 Difference]: Start difference. First operand 893 states and 3534 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:41,992 INFO L93 Difference]: Finished difference Result 1431 states and 5632 transitions. [2021-03-10 22:30:41,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:30:41,992 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:41,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:41,996 INFO L225 Difference]: With dead ends: 1431 [2021-03-10 22:30:41,996 INFO L226 Difference]: Without dead ends: 1360 [2021-03-10 22:30:41,996 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 510.9ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:30:42,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-03-10 22:30:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 917. [2021-03-10 22:30:42,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 3.947598253275109) internal successors, (3616), 916 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:42,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 3616 transitions. [2021-03-10 22:30:42,030 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 3616 transitions. Word has length 26 [2021-03-10 22:30:42,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:42,030 INFO L480 AbstractCegarLoop]: Abstraction has 917 states and 3616 transitions. [2021-03-10 22:30:42,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:42,030 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 3616 transitions. [2021-03-10 22:30:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:42,032 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:42,032 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:42,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:42,235 INFO L428 AbstractCegarLoop]: === Iteration 54 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:42,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:42,235 INFO L82 PathProgramCache]: Analyzing trace with hash -227738250, now seen corresponding path program 9 times [2021-03-10 22:30:42,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:42,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069538612] [2021-03-10 22:30:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:42,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069538612] [2021-03-10 22:30:42,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143239180] [2021-03-10 22:30:42,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:30:42,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:30:42,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:42,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:42,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:42,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:42,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-10 22:30:42,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:42,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:42,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:42,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-03-10 22:30:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:42,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:42,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:30:42,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500384340] [2021-03-10 22:30:42,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:30:42,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:42,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:30:42,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:30:42,705 INFO L87 Difference]: Start difference. First operand 917 states and 3616 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:43,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:43,708 INFO L93 Difference]: Finished difference Result 1481 states and 5804 transitions. [2021-03-10 22:30:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:30:43,709 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:43,712 INFO L225 Difference]: With dead ends: 1481 [2021-03-10 22:30:43,713 INFO L226 Difference]: Without dead ends: 1410 [2021-03-10 22:30:43,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 614.9ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:30:43,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-03-10 22:30:43,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 884. [2021-03-10 22:30:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.9614949037372593) internal successors, (3498), 883 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3498 transitions. [2021-03-10 22:30:43,739 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3498 transitions. Word has length 26 [2021-03-10 22:30:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:43,739 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 3498 transitions. [2021-03-10 22:30:43,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3498 transitions. [2021-03-10 22:30:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:43,742 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:43,742 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:43,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-03-10 22:30:43,955 INFO L428 AbstractCegarLoop]: === Iteration 55 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:43,956 INFO L82 PathProgramCache]: Analyzing trace with hash -55965950, now seen corresponding path program 10 times [2021-03-10 22:30:43,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:43,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642491667] [2021-03-10 22:30:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:44,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642491667] [2021-03-10 22:30:44,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510753313] [2021-03-10 22:30:44,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:44,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:44,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:44,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:44,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:44,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:44,226 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 [2021-03-10 22:30:44,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:44,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:44,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:44,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:30:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:44,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:44,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:30:44,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619921676] [2021-03-10 22:30:44,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:44,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:44,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:44,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:44,284 INFO L87 Difference]: Start difference. First operand 884 states and 3498 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:44,824 INFO L93 Difference]: Finished difference Result 1728 states and 6709 transitions. [2021-03-10 22:30:44,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:30:44,824 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:44,829 INFO L225 Difference]: With dead ends: 1728 [2021-03-10 22:30:44,829 INFO L226 Difference]: Without dead ends: 1657 [2021-03-10 22:30:44,829 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-03-10 22:30:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 916. [2021-03-10 22:30:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.9366120218579237) internal successors, (3602), 915 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:44,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3602 transitions. [2021-03-10 22:30:44,850 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3602 transitions. Word has length 26 [2021-03-10 22:30:44,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:44,850 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 3602 transitions. [2021-03-10 22:30:44,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:44,850 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3602 transitions. [2021-03-10 22:30:44,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:44,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:44,853 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:45,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:45,053 INFO L428 AbstractCegarLoop]: === Iteration 56 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:45,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1629461346, now seen corresponding path program 10 times [2021-03-10 22:30:45,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:45,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914370207] [2021-03-10 22:30:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:45,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914370207] [2021-03-10 22:30:45,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418850399] [2021-03-10 22:30:45,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:45,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:45,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:45,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:45,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:45,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:45,323 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 [2021-03-10 22:30:45,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:45,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:45,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:45,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:30:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:45,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:45,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:30:45,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758032773] [2021-03-10 22:30:45,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:45,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:45,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:45,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:45,383 INFO L87 Difference]: Start difference. First operand 916 states and 3602 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:45,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:45,910 INFO L93 Difference]: Finished difference Result 1770 states and 6860 transitions. [2021-03-10 22:30:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:30:45,911 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:45,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:45,916 INFO L225 Difference]: With dead ends: 1770 [2021-03-10 22:30:45,917 INFO L226 Difference]: Without dead ends: 1699 [2021-03-10 22:30:45,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 272.0ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:45,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-03-10 22:30:45,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 884. [2021-03-10 22:30:45,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.9614949037372593) internal successors, (3498), 883 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3498 transitions. [2021-03-10 22:30:45,937 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3498 transitions. Word has length 26 [2021-03-10 22:30:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:45,938 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 3498 transitions. [2021-03-10 22:30:45,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3498 transitions. [2021-03-10 22:30:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:45,940 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:45,940 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:46,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-03-10 22:30:46,141 INFO L428 AbstractCegarLoop]: === Iteration 57 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:46,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1871455264, now seen corresponding path program 11 times [2021-03-10 22:30:46,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:46,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715430863] [2021-03-10 22:30:46,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:46,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715430863] [2021-03-10 22:30:46,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724666962] [2021-03-10 22:30:46,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:46,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:46,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:46,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:46,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:46,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 22:30:46,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:46,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:46,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:46,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-03-10 22:30:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:46,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:46,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:30:46,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556993643] [2021-03-10 22:30:46,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:46,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:46,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:46,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:46,473 INFO L87 Difference]: Start difference. First operand 884 states and 3498 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:46,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:46,810 INFO L93 Difference]: Finished difference Result 1351 states and 5290 transitions. [2021-03-10 22:30:46,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:30:46,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:46,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:46,814 INFO L225 Difference]: With dead ends: 1351 [2021-03-10 22:30:46,814 INFO L226 Difference]: Without dead ends: 1270 [2021-03-10 22:30:46,814 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:30:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-03-10 22:30:46,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 923. [2021-03-10 22:30:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 3.9425162689804774) internal successors, (3635), 922 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:46,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 3635 transitions. [2021-03-10 22:30:46,833 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 3635 transitions. Word has length 26 [2021-03-10 22:30:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:46,833 INFO L480 AbstractCegarLoop]: Abstraction has 923 states and 3635 transitions. [2021-03-10 22:30:46,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:46,833 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 3635 transitions. [2021-03-10 22:30:46,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:46,835 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:46,836 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:47,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:47,039 INFO L428 AbstractCegarLoop]: === Iteration 58 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:47,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:47,040 INFO L82 PathProgramCache]: Analyzing trace with hash -186027968, now seen corresponding path program 11 times [2021-03-10 22:30:47,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:47,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289755029] [2021-03-10 22:30:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:47,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289755029] [2021-03-10 22:30:47,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914518203] [2021-03-10 22:30:47,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:47,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:47,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:47,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:47,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:47,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:47,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 22:30:47,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:47,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:47,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:47,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-03-10 22:30:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:47,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:47,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:30:47,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264708802] [2021-03-10 22:30:47,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:30:47,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:47,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:30:47,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:47,376 INFO L87 Difference]: Start difference. First operand 923 states and 3635 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:48,063 INFO L93 Difference]: Finished difference Result 1488 states and 5810 transitions. [2021-03-10 22:30:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:30:48,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:48,068 INFO L225 Difference]: With dead ends: 1488 [2021-03-10 22:30:48,068 INFO L226 Difference]: Without dead ends: 1407 [2021-03-10 22:30:48,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 443.1ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:30:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-03-10 22:30:48,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 893. [2021-03-10 22:30:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.958520179372197) internal successors, (3531), 892 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:48,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3531 transitions. [2021-03-10 22:30:48,087 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3531 transitions. Word has length 26 [2021-03-10 22:30:48,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:48,087 INFO L480 AbstractCegarLoop]: Abstraction has 893 states and 3531 transitions. [2021-03-10 22:30:48,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3531 transitions. [2021-03-10 22:30:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:48,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:48,089 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:48,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:48,290 INFO L428 AbstractCegarLoop]: === Iteration 59 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:48,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:48,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1228606434, now seen corresponding path program 12 times [2021-03-10 22:30:48,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:48,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903518987] [2021-03-10 22:30:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:48,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903518987] [2021-03-10 22:30:48,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33811237] [2021-03-10 22:30:48,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:48,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:30:48,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:48,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:30:48,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:48,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:48,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 22:30:48,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:48,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:48,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:48,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:30:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:48,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:48,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:30:48,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550418573] [2021-03-10 22:30:48,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:30:48,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:48,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:30:48,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:48,739 INFO L87 Difference]: Start difference. First operand 893 states and 3531 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:51,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:51,238 INFO L93 Difference]: Finished difference Result 2041 states and 7758 transitions. [2021-03-10 22:30:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 22:30:51,239 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:51,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:51,243 INFO L225 Difference]: With dead ends: 2041 [2021-03-10 22:30:51,244 INFO L226 Difference]: Without dead ends: 1882 [2021-03-10 22:30:51,244 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1872.8ms TimeCoverageRelationStatistics Valid=641, Invalid=2551, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 22:30:51,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-03-10 22:30:51,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 928. [2021-03-10 22:30:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.95361380798274) internal successors, (3665), 927 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3665 transitions. [2021-03-10 22:30:51,266 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3665 transitions. Word has length 26 [2021-03-10 22:30:51,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:51,266 INFO L480 AbstractCegarLoop]: Abstraction has 928 states and 3665 transitions. [2021-03-10 22:30:51,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3665 transitions. [2021-03-10 22:30:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:51,268 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:51,268 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:51,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-03-10 22:30:51,469 INFO L428 AbstractCegarLoop]: === Iteration 60 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:51,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:51,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1670773786, now seen corresponding path program 13 times [2021-03-10 22:30:51,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:51,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608651818] [2021-03-10 22:30:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:51,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608651818] [2021-03-10 22:30:51,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702150751] [2021-03-10 22:30:51,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:51,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:51,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:51,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:51,708 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 [2021-03-10 22:30:51,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:51,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:51,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:51,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:30:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:51,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:51,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:51,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738114268] [2021-03-10 22:30:51,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:51,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:51,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:51,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:51,785 INFO L87 Difference]: Start difference. First operand 928 states and 3665 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:52,071 INFO L93 Difference]: Finished difference Result 1338 states and 5244 transitions. [2021-03-10 22:30:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:30:52,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:52,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:52,076 INFO L225 Difference]: With dead ends: 1338 [2021-03-10 22:30:52,076 INFO L226 Difference]: Without dead ends: 1255 [2021-03-10 22:30:52,077 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-03-10 22:30:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 925. [2021-03-10 22:30:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 3.955627705627706) internal successors, (3655), 924 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:52,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 3655 transitions. [2021-03-10 22:30:52,101 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 3655 transitions. Word has length 26 [2021-03-10 22:30:52,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:52,101 INFO L480 AbstractCegarLoop]: Abstraction has 925 states and 3655 transitions. [2021-03-10 22:30:52,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:52,102 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 3655 transitions. [2021-03-10 22:30:52,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:52,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:52,105 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:52,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-10 22:30:52,331 INFO L428 AbstractCegarLoop]: === Iteration 61 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:52,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:52,332 INFO L82 PathProgramCache]: Analyzing trace with hash 75307966, now seen corresponding path program 12 times [2021-03-10 22:30:52,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:52,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230573249] [2021-03-10 22:30:52,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:30:52,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230573249] [2021-03-10 22:30:52,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619040533] [2021-03-10 22:30:52,473 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 [2021-03-10 22:30:52,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:30:52,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:52,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:30:52,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:52,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:52,602 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 [2021-03-10 22:30:52,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:52,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:52,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:52,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:30:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:52,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:52,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:30:52,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675757308] [2021-03-10 22:30:52,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:30:52,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:52,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:30:52,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:52,779 INFO L87 Difference]: Start difference. First operand 925 states and 3655 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:53,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:53,757 INFO L93 Difference]: Finished difference Result 2198 states and 8311 transitions. [2021-03-10 22:30:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:30:53,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:53,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:53,762 INFO L225 Difference]: With dead ends: 2198 [2021-03-10 22:30:53,762 INFO L226 Difference]: Without dead ends: 1925 [2021-03-10 22:30:53,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 820.8ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:30:53,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-03-10 22:30:53,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 925. [2021-03-10 22:30:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 3.955627705627706) internal successors, (3655), 924 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 3655 transitions. [2021-03-10 22:30:53,797 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 3655 transitions. Word has length 26 [2021-03-10 22:30:53,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:53,797 INFO L480 AbstractCegarLoop]: Abstraction has 925 states and 3655 transitions. [2021-03-10 22:30:53,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 3655 transitions. [2021-03-10 22:30:53,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:53,800 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:53,800 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:54,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-03-10 22:30:54,027 INFO L428 AbstractCegarLoop]: === Iteration 62 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:54,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:54,028 INFO L82 PathProgramCache]: Analyzing trace with hash -457449016, now seen corresponding path program 13 times [2021-03-10 22:30:54,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:54,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560575213] [2021-03-10 22:30:54,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:30:54,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560575213] [2021-03-10 22:30:54,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111428936] [2021-03-10 22:30:54,139 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 [2021-03-10 22:30:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:54,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:54,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:54,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:54,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 22:30:54,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:54,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:54,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:54,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:30:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:54,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:54,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:54,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655999043] [2021-03-10 22:30:54,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:54,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:54,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:54,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:54,345 INFO L87 Difference]: Start difference. First operand 925 states and 3655 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:54,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:54,771 INFO L93 Difference]: Finished difference Result 1457 states and 5683 transitions. [2021-03-10 22:30:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:30:54,772 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:54,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:54,776 INFO L225 Difference]: With dead ends: 1457 [2021-03-10 22:30:54,776 INFO L226 Difference]: Without dead ends: 1367 [2021-03-10 22:30:54,776 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:30:54,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-03-10 22:30:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 922. [2021-03-10 22:30:54,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-03-10 22:30:54,795 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-03-10 22:30:54,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:54,795 INFO L480 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-03-10 22:30:54,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:54,795 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-03-10 22:30:54,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:54,797 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:54,798 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:54,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-03-10 22:30:54,998 INFO L428 AbstractCegarLoop]: === Iteration 63 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:54,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:54,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1340286744, now seen corresponding path program 11 times [2021-03-10 22:30:54,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:54,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303518637] [2021-03-10 22:30:54,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:55,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303518637] [2021-03-10 22:30:55,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637823039] [2021-03-10 22:30:55,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:55,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:30:55,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:55,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:55,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:55,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:55,169 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 [2021-03-10 22:30:55,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:55,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:55,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:55,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:30:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:55,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:55,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:55,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210446514] [2021-03-10 22:30:55,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:55,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:55,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:55,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:55,250 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:55,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:55,468 INFO L93 Difference]: Finished difference Result 1298 states and 5098 transitions. [2021-03-10 22:30:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:30:55,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:55,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:55,472 INFO L225 Difference]: With dead ends: 1298 [2021-03-10 22:30:55,472 INFO L226 Difference]: Without dead ends: 1225 [2021-03-10 22:30:55,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:30:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-03-10 22:30:55,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 940. [2021-03-10 22:30:55,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.961661341853035) internal successors, (3720), 939 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3720 transitions. [2021-03-10 22:30:55,490 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3720 transitions. Word has length 26 [2021-03-10 22:30:55,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:55,490 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 3720 transitions. [2021-03-10 22:30:55,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:55,490 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3720 transitions. [2021-03-10 22:30:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:55,492 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:55,492 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:55,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-03-10 22:30:55,693 INFO L428 AbstractCegarLoop]: === Iteration 64 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:55,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1428609474, now seen corresponding path program 12 times [2021-03-10 22:30:55,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:55,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260066751] [2021-03-10 22:30:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:55,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260066751] [2021-03-10 22:30:55,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682018695] [2021-03-10 22:30:55,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:55,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:30:55,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:55,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:30:55,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:55,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:55,880 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 [2021-03-10 22:30:55,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:55,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:55,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:55,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-03-10 22:30:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:55,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:55,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 22:30:55,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408876445] [2021-03-10 22:30:55,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:30:55,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:56,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:30:56,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:30:56,004 INFO L87 Difference]: Start difference. First operand 940 states and 3720 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:57,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:57,289 INFO L93 Difference]: Finished difference Result 1722 states and 6769 transitions. [2021-03-10 22:30:57,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:30:57,290 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:57,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:57,294 INFO L225 Difference]: With dead ends: 1722 [2021-03-10 22:30:57,294 INFO L226 Difference]: Without dead ends: 1647 [2021-03-10 22:30:57,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 910.2ms TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:30:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-03-10 22:30:57,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 931. [2021-03-10 22:30:57,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:57,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-03-10 22:30:57,317 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-03-10 22:30:57,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:57,317 INFO L480 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-03-10 22:30:57,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:57,317 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-03-10 22:30:57,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:57,320 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:57,320 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:57,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:57,520 INFO L428 AbstractCegarLoop]: === Iteration 65 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:57,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:57,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1665692808, now seen corresponding path program 11 times [2021-03-10 22:30:57,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:57,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64454160] [2021-03-10 22:30:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:57,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64454160] [2021-03-10 22:30:57,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003626981] [2021-03-10 22:30:57,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:57,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:30:57,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:57,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:57,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:57,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:57,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 22:30:57,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:57,811 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.9 percent of original size [2021-03-10 22:30:57,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:57,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:13 [2021-03-10 22:30:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:57,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:57,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:30:57,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132579371] [2021-03-10 22:30:57,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:57,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:57,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:57,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:57,879 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:58,214 INFO L93 Difference]: Finished difference Result 1339 states and 5257 transitions. [2021-03-10 22:30:58,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:30:58,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:58,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:58,218 INFO L225 Difference]: With dead ends: 1339 [2021-03-10 22:30:58,218 INFO L226 Difference]: Without dead ends: 1257 [2021-03-10 22:30:58,218 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:30:58,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-03-10 22:30:58,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 940. [2021-03-10 22:30:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.9605963791267307) internal successors, (3719), 939 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3719 transitions. [2021-03-10 22:30:58,237 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3719 transitions. Word has length 26 [2021-03-10 22:30:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:58,237 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 3719 transitions. [2021-03-10 22:30:58,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:58,237 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3719 transitions. [2021-03-10 22:30:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:58,239 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:58,239 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:58,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:58,440 INFO L428 AbstractCegarLoop]: === Iteration 66 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:58,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1045208742, now seen corresponding path program 12 times [2021-03-10 22:30:58,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:58,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620321153] [2021-03-10 22:30:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:58,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620321153] [2021-03-10 22:30:58,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024283981] [2021-03-10 22:30:58,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:58,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:30:58,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:58,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:58,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:58,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:58,656 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 [2021-03-10 22:30:58,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:30:58,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:58,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:58,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-03-10 22:30:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:58,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:58,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 22:30:58,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603100617] [2021-03-10 22:30:58,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:30:58,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:58,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:30:58,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:30:58,753 INFO L87 Difference]: Start difference. First operand 940 states and 3719 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:59,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:59,348 INFO L93 Difference]: Finished difference Result 1443 states and 5632 transitions. [2021-03-10 22:30:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:30:59,348 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:30:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:59,352 INFO L225 Difference]: With dead ends: 1443 [2021-03-10 22:30:59,352 INFO L226 Difference]: Without dead ends: 1370 [2021-03-10 22:30:59,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 415.7ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:30:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-03-10 22:30:59,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 931. [2021-03-10 22:30:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-03-10 22:30:59,381 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-03-10 22:30:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:59,381 INFO L480 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-03-10 22:30:59,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-03-10 22:30:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:30:59,385 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:59,385 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:59,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-10 22:30:59,599 INFO L428 AbstractCegarLoop]: === Iteration 67 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:59,600 INFO L82 PathProgramCache]: Analyzing trace with hash 450176604, now seen corresponding path program 13 times [2021-03-10 22:30:59,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:59,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747448813] [2021-03-10 22:30:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:59,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747448813] [2021-03-10 22:30:59,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992640365] [2021-03-10 22:30:59,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:59,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:30:59,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:59,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:30:59,798 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 [2021-03-10 22:30:59,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:30:59,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:30:59,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:30:59,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-03-10 22:30:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:59,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:59,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:30:59,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367991495] [2021-03-10 22:30:59,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:59,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:59,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:59,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:59,844 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:00,197 INFO L93 Difference]: Finished difference Result 1323 states and 5177 transitions. [2021-03-10 22:31:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:31:00,198 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:00,202 INFO L225 Difference]: With dead ends: 1323 [2021-03-10 22:31:00,202 INFO L226 Difference]: Without dead ends: 1252 [2021-03-10 22:31:00,202 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:00,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-03-10 22:31:00,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 955. [2021-03-10 22:31:00,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.9454926624737947) internal successors, (3764), 954 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:00,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3764 transitions. [2021-03-10 22:31:00,222 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3764 transitions. Word has length 26 [2021-03-10 22:31:00,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:00,222 INFO L480 AbstractCegarLoop]: Abstraction has 955 states and 3764 transitions. [2021-03-10 22:31:00,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:00,222 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3764 transitions. [2021-03-10 22:31:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:00,224 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:00,224 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:00,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:00,425 INFO L428 AbstractCegarLoop]: === Iteration 68 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:00,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:00,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1315832056, now seen corresponding path program 13 times [2021-03-10 22:31:00,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:00,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264859277] [2021-03-10 22:31:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:00,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264859277] [2021-03-10 22:31:00,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489851287] [2021-03-10 22:31:00,512 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 [2021-03-10 22:31:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:00,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:00,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:00,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:00,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 22:31:00,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:00,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:00,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:00,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-03-10 22:31:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:00,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:00,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:31:00,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435213471] [2021-03-10 22:31:00,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:31:00,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:00,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:31:00,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:31:00,682 INFO L87 Difference]: Start difference. First operand 955 states and 3764 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:00,985 INFO L93 Difference]: Finished difference Result 1359 states and 5303 transitions. [2021-03-10 22:31:00,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:31:00,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:00,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:00,989 INFO L225 Difference]: With dead ends: 1359 [2021-03-10 22:31:00,989 INFO L226 Difference]: Without dead ends: 1288 [2021-03-10 22:31:00,990 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:31:00,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-03-10 22:31:01,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 922. [2021-03-10 22:31:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-03-10 22:31:01,008 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-03-10 22:31:01,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:01,008 INFO L480 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-03-10 22:31:01,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:01,009 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-03-10 22:31:01,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:01,011 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:01,011 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:01,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-10 22:31:01,211 INFO L428 AbstractCegarLoop]: === Iteration 69 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:01,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:01,212 INFO L82 PathProgramCache]: Analyzing trace with hash -903815988, now seen corresponding path program 14 times [2021-03-10 22:31:01,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:01,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507043632] [2021-03-10 22:31:01,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:01,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507043632] [2021-03-10 22:31:01,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957085177] [2021-03-10 22:31:01,299 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 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 [2021-03-10 22:31:01,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:01,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:01,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:31:01,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:01,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:01,493 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 [2021-03-10 22:31:01,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:31:01,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:01,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:01,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-03-10 22:31:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:01,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:01,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:31:01,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608594633] [2021-03-10 22:31:01,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:31:01,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:01,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:31:01,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:01,591 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:02,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:02,705 INFO L93 Difference]: Finished difference Result 1718 states and 6716 transitions. [2021-03-10 22:31:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:31:02,705 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:02,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:02,710 INFO L225 Difference]: With dead ends: 1718 [2021-03-10 22:31:02,710 INFO L226 Difference]: Without dead ends: 1645 [2021-03-10 22:31:02,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 659.3ms TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:31:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-03-10 22:31:02,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 958. [2021-03-10 22:31:02,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 3.941483803552769) internal successors, (3772), 957 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3772 transitions. [2021-03-10 22:31:02,733 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3772 transitions. Word has length 26 [2021-03-10 22:31:02,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:02,733 INFO L480 AbstractCegarLoop]: Abstraction has 958 states and 3772 transitions. [2021-03-10 22:31:02,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:02,734 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3772 transitions. [2021-03-10 22:31:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:02,736 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:02,736 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:02,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:02,936 INFO L428 AbstractCegarLoop]: === Iteration 70 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:02,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:02,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1614115146, now seen corresponding path program 14 times [2021-03-10 22:31:02,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:02,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582103272] [2021-03-10 22:31:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:03,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582103272] [2021-03-10 22:31:03,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667351253] [2021-03-10 22:31:03,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:03,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:03,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:03,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:31:03,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:03,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:03,226 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 [2021-03-10 22:31:03,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:31:03,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:03,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:03,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-03-10 22:31:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:03,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:03,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:31:03,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646535097] [2021-03-10 22:31:03,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:31:03,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:03,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:31:03,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:03,331 INFO L87 Difference]: Start difference. First operand 958 states and 3772 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:04,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:04,325 INFO L93 Difference]: Finished difference Result 1671 states and 6552 transitions. [2021-03-10 22:31:04,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:31:04,325 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:04,329 INFO L225 Difference]: With dead ends: 1671 [2021-03-10 22:31:04,329 INFO L226 Difference]: Without dead ends: 1598 [2021-03-10 22:31:04,329 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 681.6ms TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:31:04,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2021-03-10 22:31:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 931. [2021-03-10 22:31:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:04,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-03-10 22:31:04,348 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-03-10 22:31:04,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:04,348 INFO L480 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-03-10 22:31:04,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:04,348 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-03-10 22:31:04,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:04,350 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:04,350 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:04,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-03-10 22:31:04,551 INFO L428 AbstractCegarLoop]: === Iteration 71 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:04,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:04,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1878957560, now seen corresponding path program 15 times [2021-03-10 22:31:04,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:04,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878167802] [2021-03-10 22:31:04,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:04,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878167802] [2021-03-10 22:31:04,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329829224] [2021-03-10 22:31:04,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:04,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:31:04,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:04,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:31:04,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:04,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:04,753 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 [2021-03-10 22:31:04,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:31:04,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:04,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:04,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:31:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:04,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:04,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:31:04,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285928757] [2021-03-10 22:31:04,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:31:04,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:04,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:31:04,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:04,924 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:06,455 INFO L93 Difference]: Finished difference Result 1783 states and 6937 transitions. [2021-03-10 22:31:06,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 22:31:06,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:06,459 INFO L225 Difference]: With dead ends: 1783 [2021-03-10 22:31:06,459 INFO L226 Difference]: Without dead ends: 1710 [2021-03-10 22:31:06,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1065.9ms TimeCoverageRelationStatistics Valid=337, Invalid=1223, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:31:06,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-03-10 22:31:06,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 940. [2021-03-10 22:31:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.9605963791267307) internal successors, (3719), 939 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:06,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3719 transitions. [2021-03-10 22:31:06,488 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3719 transitions. Word has length 26 [2021-03-10 22:31:06,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:06,489 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 3719 transitions. [2021-03-10 22:31:06,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:06,489 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3719 transitions. [2021-03-10 22:31:06,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:06,491 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:06,491 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:06,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:06,707 INFO L428 AbstractCegarLoop]: === Iteration 72 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:06,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:06,707 INFO L82 PathProgramCache]: Analyzing trace with hash 2102483340, now seen corresponding path program 16 times [2021-03-10 22:31:06,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:06,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312984621] [2021-03-10 22:31:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:06,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312984621] [2021-03-10 22:31:06,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229584641] [2021-03-10 22:31:06,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:06,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:06,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:06,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:06,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:06,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:06,887 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 [2021-03-10 22:31:06,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:06,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:06,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:06,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:31:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:06,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:06,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:31:06,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712410002] [2021-03-10 22:31:06,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:31:06,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:06,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:31:06,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:06,958 INFO L87 Difference]: Start difference. First operand 940 states and 3719 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:07,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:07,216 INFO L93 Difference]: Finished difference Result 1357 states and 5334 transitions. [2021-03-10 22:31:07,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:31:07,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:07,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:07,220 INFO L225 Difference]: With dead ends: 1357 [2021-03-10 22:31:07,220 INFO L226 Difference]: Without dead ends: 1274 [2021-03-10 22:31:07,220 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:07,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-03-10 22:31:07,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 931. [2021-03-10 22:31:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-03-10 22:31:07,237 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-03-10 22:31:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:07,237 INFO L480 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-03-10 22:31:07,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:07,237 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-03-10 22:31:07,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:07,239 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:07,239 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:07,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:07,440 INFO L428 AbstractCegarLoop]: === Iteration 73 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:07,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1242984242, now seen corresponding path program 15 times [2021-03-10 22:31:07,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:07,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450017878] [2021-03-10 22:31:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:07,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450017878] [2021-03-10 22:31:07,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937700888] [2021-03-10 22:31:07,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:31:07,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:31:07,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:07,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:31:07,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:07,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:07,648 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 [2021-03-10 22:31:07,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:31:07,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:07,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:07,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:31:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:07,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:07,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:31:07,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143247513] [2021-03-10 22:31:07,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:31:07,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:07,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:31:07,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:07,806 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:08,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:08,768 INFO L93 Difference]: Finished difference Result 1660 states and 6502 transitions. [2021-03-10 22:31:08,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:31:08,768 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:08,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:08,772 INFO L225 Difference]: With dead ends: 1660 [2021-03-10 22:31:08,772 INFO L226 Difference]: Without dead ends: 1587 [2021-03-10 22:31:08,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 715.5ms TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:31:08,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-03-10 22:31:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 940. [2021-03-10 22:31:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.961661341853035) internal successors, (3720), 939 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3720 transitions. [2021-03-10 22:31:08,791 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3720 transitions. Word has length 26 [2021-03-10 22:31:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:08,791 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 3720 transitions. [2021-03-10 22:31:08,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3720 transitions. [2021-03-10 22:31:08,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:08,793 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:08,793 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:08,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:08,993 INFO L428 AbstractCegarLoop]: === Iteration 74 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:08,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:08,994 INFO L82 PathProgramCache]: Analyzing trace with hash 786699224, now seen corresponding path program 16 times [2021-03-10 22:31:08,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:08,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417878103] [2021-03-10 22:31:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:09,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417878103] [2021-03-10 22:31:09,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830815153] [2021-03-10 22:31:09,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:09,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:09,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:09,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:09,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:09,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:09,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:31:09,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:09,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:09,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:09,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:31:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:09,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:09,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:31:09,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821323960] [2021-03-10 22:31:09,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:31:09,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:09,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:31:09,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:09,253 INFO L87 Difference]: Start difference. First operand 940 states and 3720 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:09,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:09,610 INFO L93 Difference]: Finished difference Result 1301 states and 5111 transitions. [2021-03-10 22:31:09,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:31:09,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:09,613 INFO L225 Difference]: With dead ends: 1301 [2021-03-10 22:31:09,614 INFO L226 Difference]: Without dead ends: 1226 [2021-03-10 22:31:09,614 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:09,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-03-10 22:31:09,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 922. [2021-03-10 22:31:09,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-03-10 22:31:09,631 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-03-10 22:31:09,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:09,631 INFO L480 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-03-10 22:31:09,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:09,631 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-03-10 22:31:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:09,633 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:09,633 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:09,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-03-10 22:31:09,833 INFO L428 AbstractCegarLoop]: === Iteration 75 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:09,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1972528020, now seen corresponding path program 14 times [2021-03-10 22:31:09,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:09,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277517867] [2021-03-10 22:31:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:09,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277517867] [2021-03-10 22:31:09,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535834502] [2021-03-10 22:31:09,927 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 [2021-03-10 22:31:09,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:09,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:09,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:10,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:10,059 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 [2021-03-10 22:31:10,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:10,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:10,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:10,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:31:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:10,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:10,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:31:10,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479416604] [2021-03-10 22:31:10,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:31:10,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:10,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:31:10,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:10,115 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:10,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:10,597 INFO L93 Difference]: Finished difference Result 1634 states and 6315 transitions. [2021-03-10 22:31:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:31:10,598 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:10,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:10,603 INFO L225 Difference]: With dead ends: 1634 [2021-03-10 22:31:10,603 INFO L226 Difference]: Without dead ends: 1543 [2021-03-10 22:31:10,603 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 251.8ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:31:10,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-03-10 22:31:10,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 964. [2021-03-10 22:31:10,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 3.936656282450675) internal successors, (3791), 963 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3791 transitions. [2021-03-10 22:31:10,652 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3791 transitions. Word has length 26 [2021-03-10 22:31:10,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:10,652 INFO L480 AbstractCegarLoop]: Abstraction has 964 states and 3791 transitions. [2021-03-10 22:31:10,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3791 transitions. [2021-03-10 22:31:10,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:10,655 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:10,655 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:10,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-10 22:31:10,880 INFO L428 AbstractCegarLoop]: === Iteration 76 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:10,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:10,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1612140118, now seen corresponding path program 14 times [2021-03-10 22:31:10,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:10,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950074311] [2021-03-10 22:31:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:11,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950074311] [2021-03-10 22:31:11,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56523766] [2021-03-10 22:31:11,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:11,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:11,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:11,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:31:11,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:11,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:11,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-03-10 22:31:11,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:31:11,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:11,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:11,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-03-10 22:31:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:11,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:11,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 22:31:11,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260052758] [2021-03-10 22:31:11,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:31:11,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:11,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:31:11,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:31:11,314 INFO L87 Difference]: Start difference. First operand 964 states and 3791 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:12,348 INFO L93 Difference]: Finished difference Result 1767 states and 6932 transitions. [2021-03-10 22:31:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:31:12,349 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:12,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:12,353 INFO L225 Difference]: With dead ends: 1767 [2021-03-10 22:31:12,353 INFO L226 Difference]: Without dead ends: 1685 [2021-03-10 22:31:12,353 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 732.0ms TimeCoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:31:12,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-03-10 22:31:12,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 931. [2021-03-10 22:31:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-03-10 22:31:12,374 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-03-10 22:31:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:12,374 INFO L480 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-03-10 22:31:12,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:12,374 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-03-10 22:31:12,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:12,376 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:12,376 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:12,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-03-10 22:31:12,578 INFO L428 AbstractCegarLoop]: === Iteration 77 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:12,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:12,579 INFO L82 PathProgramCache]: Analyzing trace with hash -832793512, now seen corresponding path program 15 times [2021-03-10 22:31:12,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:12,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77984123] [2021-03-10 22:31:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:12,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77984123] [2021-03-10 22:31:12,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052398601] [2021-03-10 22:31:12,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:31:12,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:31:12,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:12,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:12,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:12,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:12,805 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 [2021-03-10 22:31:12,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:31:12,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:12,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:12,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-03-10 22:31:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:12,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:12,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:31:12,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356481210] [2021-03-10 22:31:12,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:31:12,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:12,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:31:12,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:31:12,989 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:13,867 INFO L93 Difference]: Finished difference Result 1732 states and 6724 transitions. [2021-03-10 22:31:13,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:31:13,867 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:13,871 INFO L225 Difference]: With dead ends: 1732 [2021-03-10 22:31:13,871 INFO L226 Difference]: Without dead ends: 1568 [2021-03-10 22:31:13,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 702.0ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:31:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-03-10 22:31:13,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 931. [2021-03-10 22:31:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-03-10 22:31:13,892 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-03-10 22:31:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:13,892 INFO L480 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-03-10 22:31:13,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-03-10 22:31:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:13,894 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:13,894 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:14,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:14,096 INFO L428 AbstractCegarLoop]: === Iteration 78 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:14,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1849695216, now seen corresponding path program 16 times [2021-03-10 22:31:14,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:14,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243736052] [2021-03-10 22:31:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:14,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243736052] [2021-03-10 22:31:14,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295276769] [2021-03-10 22:31:14,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:14,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:14,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:14,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:14,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:14,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:14,356 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 [2021-03-10 22:31:14,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:14,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:14,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:14,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:31:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:14,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:14,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:31:14,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192365731] [2021-03-10 22:31:14,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:31:14,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:14,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:31:14,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:14,435 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:14,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:14,848 INFO L93 Difference]: Finished difference Result 1446 states and 5660 transitions. [2021-03-10 22:31:14,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:31:14,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:14,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:14,852 INFO L225 Difference]: With dead ends: 1446 [2021-03-10 22:31:14,852 INFO L226 Difference]: Without dead ends: 1356 [2021-03-10 22:31:14,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:31:14,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-03-10 22:31:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 931. [2021-03-10 22:31:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-03-10 22:31:14,870 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-03-10 22:31:14,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:14,871 INFO L480 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-03-10 22:31:14,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-03-10 22:31:14,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:14,873 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:14,873 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:15,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-03-10 22:31:15,073 INFO L428 AbstractCegarLoop]: === Iteration 79 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:15,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:15,074 INFO L82 PathProgramCache]: Analyzing trace with hash 992583964, now seen corresponding path program 15 times [2021-03-10 22:31:15,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:15,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972855481] [2021-03-10 22:31:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:15,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972855481] [2021-03-10 22:31:15,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625319191] [2021-03-10 22:31:15,175 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 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 [2021-03-10 22:31:15,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:31:15,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:15,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:31:15,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:15,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:15,302 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 [2021-03-10 22:31:15,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:31:15,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:15,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:15,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-03-10 22:31:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:15,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:15,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 22:31:15,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192341438] [2021-03-10 22:31:15,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:31:15,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:15,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:31:15,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:31:15,443 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:16,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:16,800 INFO L93 Difference]: Finished difference Result 1803 states and 7103 transitions. [2021-03-10 22:31:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:31:16,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:16,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:16,805 INFO L225 Difference]: With dead ends: 1803 [2021-03-10 22:31:16,805 INFO L226 Difference]: Without dead ends: 1721 [2021-03-10 22:31:16,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1028.1ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:31:16,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-03-10 22:31:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 940. [2021-03-10 22:31:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.957401490947817) internal successors, (3716), 939 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:16,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3716 transitions. [2021-03-10 22:31:16,826 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3716 transitions. Word has length 26 [2021-03-10 22:31:16,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:16,826 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 3716 transitions. [2021-03-10 22:31:16,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:16,826 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3716 transitions. [2021-03-10 22:31:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:16,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:16,828 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:17,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-10 22:31:17,028 INFO L428 AbstractCegarLoop]: === Iteration 80 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1536354800, now seen corresponding path program 16 times [2021-03-10 22:31:17,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:17,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520462947] [2021-03-10 22:31:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:17,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:17,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520462947] [2021-03-10 22:31:17,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177561646] [2021-03-10 22:31:17,126 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 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 [2021-03-10 22:31:17,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:17,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:17,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:17,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:17,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:17,270 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 [2021-03-10 22:31:17,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:17,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:17,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:17,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:31:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:17,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:17,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:31:17,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075314139] [2021-03-10 22:31:17,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:31:17,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:17,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:31:17,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:17,349 INFO L87 Difference]: Start difference. First operand 940 states and 3716 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:17,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:17,597 INFO L93 Difference]: Finished difference Result 1341 states and 5252 transitions. [2021-03-10 22:31:17,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:31:17,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:17,600 INFO L225 Difference]: With dead ends: 1341 [2021-03-10 22:31:17,600 INFO L226 Difference]: Without dead ends: 1268 [2021-03-10 22:31:17,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-03-10 22:31:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 922. [2021-03-10 22:31:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:17,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-03-10 22:31:17,622 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-03-10 22:31:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:17,622 INFO L480 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-03-10 22:31:17,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-03-10 22:31:17,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:17,624 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:17,624 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:17,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-03-10 22:31:17,827 INFO L428 AbstractCegarLoop]: === Iteration 81 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:17,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1371947268, now seen corresponding path program 17 times [2021-03-10 22:31:17,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:17,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231767911] [2021-03-10 22:31:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:17,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231767911] [2021-03-10 22:31:17,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146426284] [2021-03-10 22:31:17,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:17,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:17,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:17,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:17,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:18,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:18,053 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 [2021-03-10 22:31:18,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:18,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:18,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:18,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:31:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:18,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:18,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:31:18,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710435976] [2021-03-10 22:31:18,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:31:18,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:18,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:31:18,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:18,109 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:18,697 INFO L93 Difference]: Finished difference Result 1898 states and 7325 transitions. [2021-03-10 22:31:18,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:31:18,698 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:18,702 INFO L225 Difference]: With dead ends: 1898 [2021-03-10 22:31:18,702 INFO L226 Difference]: Without dead ends: 1825 [2021-03-10 22:31:18,702 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:31:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-03-10 22:31:18,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 972. [2021-03-10 22:31:18,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.9155509783728117) internal successors, (3802), 971 states have internal predecessors, (3802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:18,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 3802 transitions. [2021-03-10 22:31:18,725 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 3802 transitions. Word has length 26 [2021-03-10 22:31:18,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:18,725 INFO L480 AbstractCegarLoop]: Abstraction has 972 states and 3802 transitions. [2021-03-10 22:31:18,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:18,726 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 3802 transitions. [2021-03-10 22:31:18,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:18,728 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:18,728 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:18,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:18,928 INFO L428 AbstractCegarLoop]: === Iteration 82 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:18,929 INFO L82 PathProgramCache]: Analyzing trace with hash -2082246426, now seen corresponding path program 17 times [2021-03-10 22:31:18,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:18,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884083998] [2021-03-10 22:31:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:19,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884083998] [2021-03-10 22:31:19,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832556547] [2021-03-10 22:31:19,007 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 [2021-03-10 22:31:19,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:19,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:19,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:19,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:19,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:19,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-10 22:31:19,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:19,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:19,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:19,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:31:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:19,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:19,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:31:19,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613386265] [2021-03-10 22:31:19,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:31:19,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:19,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:31:19,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:19,202 INFO L87 Difference]: Start difference. First operand 972 states and 3802 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:19,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:19,802 INFO L93 Difference]: Finished difference Result 1853 states and 7166 transitions. [2021-03-10 22:31:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:31:19,802 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:19,806 INFO L225 Difference]: With dead ends: 1853 [2021-03-10 22:31:19,807 INFO L226 Difference]: Without dead ends: 1780 [2021-03-10 22:31:19,807 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:31:19,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2021-03-10 22:31:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 945. [2021-03-10 22:31:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 3.9322033898305087) internal successors, (3712), 944 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:19,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 3712 transitions. [2021-03-10 22:31:19,827 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 3712 transitions. Word has length 26 [2021-03-10 22:31:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:19,827 INFO L480 AbstractCegarLoop]: Abstraction has 945 states and 3712 transitions. [2021-03-10 22:31:19,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:19,827 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 3712 transitions. [2021-03-10 22:31:19,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:19,829 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:19,829 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:20,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-03-10 22:31:20,030 INFO L428 AbstractCegarLoop]: === Iteration 83 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:20,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:20,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1901734716, now seen corresponding path program 18 times [2021-03-10 22:31:20,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:20,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5766052] [2021-03-10 22:31:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:20,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5766052] [2021-03-10 22:31:20,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909110581] [2021-03-10 22:31:20,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:20,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:31:20,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:20,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:31:20,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:20,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:20,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 22:31:20,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:31:20,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:20,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:20,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-03-10 22:31:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:20,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:20,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:31:20,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660125733] [2021-03-10 22:31:20,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:31:20,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:31:20,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:20,387 INFO L87 Difference]: Start difference. First operand 945 states and 3712 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:21,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:21,537 INFO L93 Difference]: Finished difference Result 1734 states and 6750 transitions. [2021-03-10 22:31:21,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:31:21,538 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:21,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:21,542 INFO L225 Difference]: With dead ends: 1734 [2021-03-10 22:31:21,542 INFO L226 Difference]: Without dead ends: 1661 [2021-03-10 22:31:21,542 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 732.2ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:31:21,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-03-10 22:31:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 981. [2021-03-10 22:31:21,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 3.916326530612245) internal successors, (3838), 980 states have internal predecessors, (3838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 3838 transitions. [2021-03-10 22:31:21,563 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 3838 transitions. Word has length 26 [2021-03-10 22:31:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:21,563 INFO L480 AbstractCegarLoop]: Abstraction has 981 states and 3838 transitions. [2021-03-10 22:31:21,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:21,563 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 3838 transitions. [2021-03-10 22:31:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:21,564 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:21,565 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:21,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:21,766 INFO L428 AbstractCegarLoop]: === Iteration 84 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:21,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:21,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1191435558, now seen corresponding path program 18 times [2021-03-10 22:31:21,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:21,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015107426] [2021-03-10 22:31:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:21,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015107426] [2021-03-10 22:31:21,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056175995] [2021-03-10 22:31:21,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:21,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:31:21,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:21,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:31:21,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:22,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:22,027 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 [2021-03-10 22:31:22,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:31:22,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:22,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:22,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-03-10 22:31:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:22,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:22,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:31:22,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907928646] [2021-03-10 22:31:22,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:31:22,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:22,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:31:22,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:22,128 INFO L87 Difference]: Start difference. First operand 981 states and 3838 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:23,346 INFO L93 Difference]: Finished difference Result 1687 states and 6586 transitions. [2021-03-10 22:31:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:31:23,346 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:23,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:23,350 INFO L225 Difference]: With dead ends: 1687 [2021-03-10 22:31:23,350 INFO L226 Difference]: Without dead ends: 1614 [2021-03-10 22:31:23,351 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 724.3ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:31:23,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-03-10 22:31:23,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 954. [2021-03-10 22:31:23,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.9328436516264427) internal successors, (3748), 953 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:23,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3748 transitions. [2021-03-10 22:31:23,370 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3748 transitions. Word has length 26 [2021-03-10 22:31:23,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:23,370 INFO L480 AbstractCegarLoop]: Abstraction has 954 states and 3748 transitions. [2021-03-10 22:31:23,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:23,370 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3748 transitions. [2021-03-10 22:31:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:23,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:23,372 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:23,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:23,579 INFO L428 AbstractCegarLoop]: === Iteration 85 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:23,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1969961148, now seen corresponding path program 19 times [2021-03-10 22:31:23,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:23,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419299972] [2021-03-10 22:31:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:23,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419299972] [2021-03-10 22:31:23,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706106335] [2021-03-10 22:31:23,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:23,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:23,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:23,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:23,813 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 [2021-03-10 22:31:23,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:23,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:23,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:23,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:31:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:23,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:23,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:31:23,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415094265] [2021-03-10 22:31:23,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:31:23,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:23,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:31:23,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:23,905 INFO L87 Difference]: Start difference. First operand 954 states and 3748 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:24,265 INFO L93 Difference]: Finished difference Result 1477 states and 5784 transitions. [2021-03-10 22:31:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:31:24,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:24,269 INFO L225 Difference]: With dead ends: 1477 [2021-03-10 22:31:24,269 INFO L226 Difference]: Without dead ends: 1404 [2021-03-10 22:31:24,269 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:31:24,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-03-10 22:31:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 963. [2021-03-10 22:31:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9345114345114345) internal successors, (3785), 962 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3785 transitions. [2021-03-10 22:31:24,289 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3785 transitions. Word has length 26 [2021-03-10 22:31:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:24,289 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3785 transitions. [2021-03-10 22:31:24,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3785 transitions. [2021-03-10 22:31:24,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:24,291 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:24,291 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:24,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:24,495 INFO L428 AbstractCegarLoop]: === Iteration 86 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:24,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:24,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1656434752, now seen corresponding path program 20 times [2021-03-10 22:31:24,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:24,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596721694] [2021-03-10 22:31:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:24,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596721694] [2021-03-10 22:31:24,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97743817] [2021-03-10 22:31:24,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:24,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:24,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:24,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:31:24,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:24,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:24,679 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 [2021-03-10 22:31:24,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:31:24,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:24,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:24,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:31:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:24,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:24,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:31:24,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600948993] [2021-03-10 22:31:24,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:31:24,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:24,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:31:24,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:24,827 INFO L87 Difference]: Start difference. First operand 963 states and 3785 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:26,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:26,300 INFO L93 Difference]: Finished difference Result 1777 states and 6940 transitions. [2021-03-10 22:31:26,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:31:26,300 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:26,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:26,305 INFO L225 Difference]: With dead ends: 1777 [2021-03-10 22:31:26,305 INFO L226 Difference]: Without dead ends: 1694 [2021-03-10 22:31:26,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 918.3ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:31:26,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-03-10 22:31:26,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 954. [2021-03-10 22:31:26,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.9328436516264427) internal successors, (3748), 953 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3748 transitions. [2021-03-10 22:31:26,327 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3748 transitions. Word has length 26 [2021-03-10 22:31:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:26,327 INFO L480 AbstractCegarLoop]: Abstraction has 954 states and 3748 transitions. [2021-03-10 22:31:26,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:26,327 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3748 transitions. [2021-03-10 22:31:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:26,330 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:26,330 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:26,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-03-10 22:31:26,547 INFO L428 AbstractCegarLoop]: === Iteration 87 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:26,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:26,548 INFO L82 PathProgramCache]: Analyzing trace with hash 796935654, now seen corresponding path program 19 times [2021-03-10 22:31:26,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:26,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996206236] [2021-03-10 22:31:26,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:26,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996206236] [2021-03-10 22:31:26,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468490607] [2021-03-10 22:31:26,621 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 [2021-03-10 22:31:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:26,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:26,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:26,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:26,731 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 [2021-03-10 22:31:26,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:26,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:26,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:26,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:31:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:26,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:26,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:31:26,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479636064] [2021-03-10 22:31:26,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:31:26,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:26,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:31:26,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:26,805 INFO L87 Difference]: Start difference. First operand 954 states and 3748 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:27,138 INFO L93 Difference]: Finished difference Result 1424 states and 5591 transitions. [2021-03-10 22:31:27,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:31:27,139 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:27,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:27,142 INFO L225 Difference]: With dead ends: 1424 [2021-03-10 22:31:27,142 INFO L226 Difference]: Without dead ends: 1351 [2021-03-10 22:31:27,142 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:31:27,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-03-10 22:31:27,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 963. [2021-03-10 22:31:27,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9355509355509355) internal successors, (3786), 962 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3786 transitions. [2021-03-10 22:31:27,160 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3786 transitions. Word has length 26 [2021-03-10 22:31:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:27,160 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3786 transitions. [2021-03-10 22:31:27,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3786 transitions. [2021-03-10 22:31:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:27,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:27,162 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:27,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-03-10 22:31:27,363 INFO L428 AbstractCegarLoop]: === Iteration 88 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:27,363 INFO L82 PathProgramCache]: Analyzing trace with hash 340650636, now seen corresponding path program 20 times [2021-03-10 22:31:27,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:27,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745644742] [2021-03-10 22:31:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:27,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745644742] [2021-03-10 22:31:27,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449696421] [2021-03-10 22:31:27,449 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 [2021-03-10 22:31:27,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:27,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:27,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:31:27,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:27,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:27,581 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-03-10 22:31:27,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:31:27,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:27,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:27,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-03-10 22:31:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:27,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:27,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:31:27,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179643025] [2021-03-10 22:31:27,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:31:27,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:27,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:31:27,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:27,771 INFO L87 Difference]: Start difference. First operand 963 states and 3786 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:29,289 INFO L93 Difference]: Finished difference Result 1706 states and 6660 transitions. [2021-03-10 22:31:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:31:29,290 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:29,294 INFO L225 Difference]: With dead ends: 1706 [2021-03-10 22:31:29,294 INFO L226 Difference]: Without dead ends: 1631 [2021-03-10 22:31:29,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 997.8ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:31:29,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-03-10 22:31:29,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 945. [2021-03-10 22:31:29,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 3.9322033898305087) internal successors, (3712), 944 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 3712 transitions. [2021-03-10 22:31:29,316 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 3712 transitions. Word has length 26 [2021-03-10 22:31:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:29,316 INFO L480 AbstractCegarLoop]: Abstraction has 945 states and 3712 transitions. [2021-03-10 22:31:29,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:29,317 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 3712 transitions. [2021-03-10 22:31:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:29,318 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:29,318 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:29,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-03-10 22:31:29,519 INFO L428 AbstractCegarLoop]: === Iteration 89 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:29,519 INFO L82 PathProgramCache]: Analyzing trace with hash -779527332, now seen corresponding path program 17 times [2021-03-10 22:31:29,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:29,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302895067] [2021-03-10 22:31:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:29,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302895067] [2021-03-10 22:31:29,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766592855] [2021-03-10 22:31:29,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:29,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:31:29,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:29,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:29,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:29,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:29,792 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 [2021-03-10 22:31:29,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:29,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:29,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:29,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-03-10 22:31:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:29,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:29,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:31:29,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613501814] [2021-03-10 22:31:29,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:31:29,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:29,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:31:29,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:29,872 INFO L87 Difference]: Start difference. First operand 945 states and 3712 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:30,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:30,904 INFO L93 Difference]: Finished difference Result 1955 states and 7444 transitions. [2021-03-10 22:31:30,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:31:30,904 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:30,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:30,909 INFO L225 Difference]: With dead ends: 1955 [2021-03-10 22:31:30,909 INFO L226 Difference]: Without dead ends: 1819 [2021-03-10 22:31:30,909 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 539.5ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:31:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2021-03-10 22:31:30,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 1022. [2021-03-10 22:31:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.853085210577865) internal successors, (3934), 1021 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:30,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3934 transitions. [2021-03-10 22:31:30,931 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3934 transitions. Word has length 26 [2021-03-10 22:31:30,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:30,931 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3934 transitions. [2021-03-10 22:31:30,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:30,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3934 transitions. [2021-03-10 22:31:30,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:30,933 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:30,933 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:31,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:31,133 INFO L428 AbstractCegarLoop]: === Iteration 90 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:31,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:31,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1489826490, now seen corresponding path program 17 times [2021-03-10 22:31:31,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:31,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197356430] [2021-03-10 22:31:31,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:31,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197356430] [2021-03-10 22:31:31,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980956765] [2021-03-10 22:31:31,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:31,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:31,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:31,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:31,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:31,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:31,367 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 [2021-03-10 22:31:31,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:31,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:31,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:31,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-03-10 22:31:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:31,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:31,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:31:31,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292169637] [2021-03-10 22:31:31,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:31:31,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:31,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:31:31,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:31,425 INFO L87 Difference]: Start difference. First operand 1022 states and 3934 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:32,071 INFO L93 Difference]: Finished difference Result 2154 states and 8372 transitions. [2021-03-10 22:31:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:31:32,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:32,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:32,076 INFO L225 Difference]: With dead ends: 2154 [2021-03-10 22:31:32,077 INFO L226 Difference]: Without dead ends: 2072 [2021-03-10 22:31:32,077 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 295.0ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:31:32,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-03-10 22:31:32,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1022. [2021-03-10 22:31:32,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.853085210577865) internal successors, (3934), 1021 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3934 transitions. [2021-03-10 22:31:32,099 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3934 transitions. Word has length 26 [2021-03-10 22:31:32,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:32,099 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3934 transitions. [2021-03-10 22:31:32,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:32,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3934 transitions. [2021-03-10 22:31:32,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:32,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:32,101 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:32,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:32,302 INFO L428 AbstractCegarLoop]: === Iteration 91 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:32,302 INFO L82 PathProgramCache]: Analyzing trace with hash 266522242, now seen corresponding path program 18 times [2021-03-10 22:31:32,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:32,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193498392] [2021-03-10 22:31:32,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:32,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193498392] [2021-03-10 22:31:32,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793197928] [2021-03-10 22:31:32,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:32,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:31:32,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:32,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:32,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:32,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:32,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-03-10 22:31:32,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:31:32,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:32,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:32,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-03-10 22:31:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:32,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:32,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:31:32,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910617375] [2021-03-10 22:31:32,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:31:32,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:31:32,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:32,660 INFO L87 Difference]: Start difference. First operand 1022 states and 3934 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:33,504 INFO L93 Difference]: Finished difference Result 2276 states and 8661 transitions. [2021-03-10 22:31:33,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:31:33,504 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:33,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:33,508 INFO L225 Difference]: With dead ends: 2276 [2021-03-10 22:31:33,508 INFO L226 Difference]: Without dead ends: 2112 [2021-03-10 22:31:33,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 558.5ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:31:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-03-10 22:31:33,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1064. [2021-03-10 22:31:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.83725305738476) internal successors, (4079), 1063 states have internal predecessors, (4079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 4079 transitions. [2021-03-10 22:31:33,526 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 4079 transitions. Word has length 26 [2021-03-10 22:31:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:33,526 INFO L480 AbstractCegarLoop]: Abstraction has 1064 states and 4079 transitions. [2021-03-10 22:31:33,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 4079 transitions. [2021-03-10 22:31:33,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:33,528 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:33,528 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:33,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:33,729 INFO L428 AbstractCegarLoop]: === Iteration 92 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:33,729 INFO L82 PathProgramCache]: Analyzing trace with hash -443776916, now seen corresponding path program 18 times [2021-03-10 22:31:33,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:33,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134612014] [2021-03-10 22:31:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:33,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134612014] [2021-03-10 22:31:33,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264168616] [2021-03-10 22:31:33,841 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 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 [2021-03-10 22:31:33,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:31:33,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:33,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:31:33,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:33,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:33,993 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 [2021-03-10 22:31:33,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:31:34,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:34,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:34,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-03-10 22:31:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:34,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:34,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 22:31:34,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763681084] [2021-03-10 22:31:34,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:31:34,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:34,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:31:34,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:31:34,091 INFO L87 Difference]: Start difference. First operand 1064 states and 4079 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:35,191 INFO L93 Difference]: Finished difference Result 1786 states and 6915 transitions. [2021-03-10 22:31:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:31:35,192 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:35,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:35,196 INFO L225 Difference]: With dead ends: 1786 [2021-03-10 22:31:35,196 INFO L226 Difference]: Without dead ends: 1704 [2021-03-10 22:31:35,196 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 748.3ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:31:35,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2021-03-10 22:31:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1031. [2021-03-10 22:31:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 3.8514563106796116) internal successors, (3967), 1030 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3967 transitions. [2021-03-10 22:31:35,216 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3967 transitions. Word has length 26 [2021-03-10 22:31:35,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:35,216 INFO L480 AbstractCegarLoop]: Abstraction has 1031 states and 3967 transitions. [2021-03-10 22:31:35,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3967 transitions. [2021-03-10 22:31:35,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:35,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:35,218 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:35,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:35,418 INFO L428 AbstractCegarLoop]: === Iteration 93 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:35,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:35,419 INFO L82 PathProgramCache]: Analyzing trace with hash 99242704, now seen corresponding path program 19 times [2021-03-10 22:31:35,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:35,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126983750] [2021-03-10 22:31:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:35,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126983750] [2021-03-10 22:31:35,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644847201] [2021-03-10 22:31:35,541 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 [2021-03-10 22:31:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:35,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:35,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:35,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:35,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 22:31:35,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:35,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:35,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:35,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:31:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:35,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:35,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:31:35,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440259731] [2021-03-10 22:31:35,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:31:35,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:35,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:31:35,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:31:35,780 INFO L87 Difference]: Start difference. First operand 1031 states and 3967 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:36,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:36,453 INFO L93 Difference]: Finished difference Result 1827 states and 7043 transitions. [2021-03-10 22:31:36,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:31:36,453 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:36,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:36,457 INFO L225 Difference]: With dead ends: 1827 [2021-03-10 22:31:36,457 INFO L226 Difference]: Without dead ends: 1736 [2021-03-10 22:31:36,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:36,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-03-10 22:31:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1031. [2021-03-10 22:31:36,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 3.8514563106796116) internal successors, (3967), 1030 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3967 transitions. [2021-03-10 22:31:36,478 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3967 transitions. Word has length 26 [2021-03-10 22:31:36,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:36,479 INFO L480 AbstractCegarLoop]: Abstraction has 1031 states and 3967 transitions. [2021-03-10 22:31:36,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3967 transitions. [2021-03-10 22:31:36,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:36,480 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:36,481 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:36,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-03-10 22:31:36,681 INFO L428 AbstractCegarLoop]: === Iteration 94 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:36,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:36,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1513235864, now seen corresponding path program 20 times [2021-03-10 22:31:36,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:36,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183215681] [2021-03-10 22:31:36,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:36,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183215681] [2021-03-10 22:31:36,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744700914] [2021-03-10 22:31:36,831 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 [2021-03-10 22:31:36,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:36,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:36,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:36,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:36,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:36,954 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 [2021-03-10 22:31:36,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:36,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:36,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:36,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:31:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:37,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:37,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-03-10 22:31:37,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007099687] [2021-03-10 22:31:37,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:31:37,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:37,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:31:37,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:31:37,032 INFO L87 Difference]: Start difference. First operand 1031 states and 3967 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:37,753 INFO L93 Difference]: Finished difference Result 1786 states and 6895 transitions. [2021-03-10 22:31:37,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:31:37,753 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:37,757 INFO L225 Difference]: With dead ends: 1786 [2021-03-10 22:31:37,757 INFO L226 Difference]: Without dead ends: 1696 [2021-03-10 22:31:37,757 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 472.1ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:31:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-03-10 22:31:37,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1031. [2021-03-10 22:31:37,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 3.8514563106796116) internal successors, (3967), 1030 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3967 transitions. [2021-03-10 22:31:37,779 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3967 transitions. Word has length 26 [2021-03-10 22:31:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:37,779 INFO L480 AbstractCegarLoop]: Abstraction has 1031 states and 3967 transitions. [2021-03-10 22:31:37,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:37,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3967 transitions. [2021-03-10 22:31:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:37,782 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:37,782 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:37,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-03-10 22:31:37,999 INFO L428 AbstractCegarLoop]: === Iteration 95 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:37,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:37,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1924620180, now seen corresponding path program 19 times [2021-03-10 22:31:38,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:38,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960497914] [2021-03-10 22:31:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:38,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960497914] [2021-03-10 22:31:38,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125757897] [2021-03-10 22:31:38,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:38,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:38,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:38,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:38,207 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 [2021-03-10 22:31:38,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:38,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:38,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:38,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:31:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:38,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:38,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:31:38,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694447921] [2021-03-10 22:31:38,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:31:38,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:38,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:31:38,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:38,280 INFO L87 Difference]: Start difference. First operand 1031 states and 3967 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:38,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:38,670 INFO L93 Difference]: Finished difference Result 1577 states and 6093 transitions. [2021-03-10 22:31:38,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:31:38,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:38,674 INFO L225 Difference]: With dead ends: 1577 [2021-03-10 22:31:38,674 INFO L226 Difference]: Without dead ends: 1495 [2021-03-10 22:31:38,674 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:31:38,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2021-03-10 22:31:38,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1040. [2021-03-10 22:31:38,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 3.8537054860442734) internal successors, (4004), 1039 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:38,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 4004 transitions. [2021-03-10 22:31:38,693 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 4004 transitions. Word has length 26 [2021-03-10 22:31:38,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:38,694 INFO L480 AbstractCegarLoop]: Abstraction has 1040 states and 4004 transitions. [2021-03-10 22:31:38,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:38,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 4004 transitions. [2021-03-10 22:31:38,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:31:38,695 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:38,696 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:38,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-03-10 22:31:38,896 INFO L428 AbstractCegarLoop]: === Iteration 96 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:38,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:38,896 INFO L82 PathProgramCache]: Analyzing trace with hash -604318584, now seen corresponding path program 20 times [2021-03-10 22:31:38,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:38,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555239352] [2021-03-10 22:31:38,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:39,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555239352] [2021-03-10 22:31:39,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763569775] [2021-03-10 22:31:39,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:39,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:39,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:39,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:31:39,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:39,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:31:39,171 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 [2021-03-10 22:31:39,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:31:39,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:31:39,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:31:39,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-03-10 22:31:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:39,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:39,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:31:39,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919468830] [2021-03-10 22:31:39,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:31:39,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:39,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:31:39,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:39,269 INFO L87 Difference]: Start difference. First operand 1040 states and 4004 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:39,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:39,842 INFO L93 Difference]: Finished difference Result 1561 states and 6013 transitions. [2021-03-10 22:31:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:31:39,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 22:31:39,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:39,847 INFO L225 Difference]: With dead ends: 1561 [2021-03-10 22:31:39,847 INFO L226 Difference]: Without dead ends: 1488 [2021-03-10 22:31:39,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 371.8ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:31:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-03-10 22:31:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1022. [2021-03-10 22:31:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.853085210577865) internal successors, (3934), 1021 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:39,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3934 transitions. [2021-03-10 22:31:39,876 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3934 transitions. Word has length 26 [2021-03-10 22:31:39,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:39,876 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3934 transitions. [2021-03-10 22:31:39,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:39,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3934 transitions. [2021-03-10 22:31:39,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:39,878 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:39,879 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:40,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 22:31:40,106 INFO L428 AbstractCegarLoop]: === Iteration 97 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:40,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:40,106 INFO L82 PathProgramCache]: Analyzing trace with hash -424605, now seen corresponding path program 21 times [2021-03-10 22:31:40,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:40,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322581240] [2021-03-10 22:31:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:40,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322581240] [2021-03-10 22:31:40,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422983404] [2021-03-10 22:31:40,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:40,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:31:40,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:40,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:40,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:40,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:40,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 22:31:40,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694820546] [2021-03-10 22:31:40,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:31:40,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:40,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:31:40,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:31:40,252 INFO L87 Difference]: Start difference. First operand 1022 states and 3934 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:40,567 INFO L93 Difference]: Finished difference Result 3341 states and 12590 transitions. [2021-03-10 22:31:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:31:40,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:40,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:40,573 INFO L225 Difference]: With dead ends: 3341 [2021-03-10 22:31:40,573 INFO L226 Difference]: Without dead ends: 3164 [2021-03-10 22:31:40,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2021-03-10 22:31:40,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 1496. [2021-03-10 22:31:40,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 4.113043478260869) internal successors, (6149), 1495 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:40,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 6149 transitions. [2021-03-10 22:31:40,600 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 6149 transitions. Word has length 28 [2021-03-10 22:31:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:40,600 INFO L480 AbstractCegarLoop]: Abstraction has 1496 states and 6149 transitions. [2021-03-10 22:31:40,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 6149 transitions. [2021-03-10 22:31:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:40,603 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:40,603 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:40,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-03-10 22:31:40,808 INFO L428 AbstractCegarLoop]: === Iteration 98 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:40,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:40,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2039590629, now seen corresponding path program 22 times [2021-03-10 22:31:40,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:40,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179513842] [2021-03-10 22:31:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:40,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179513842] [2021-03-10 22:31:40,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862434648] [2021-03-10 22:31:40,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:40,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:40,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:40,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:40,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:40,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:40,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 22:31:40,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64536633] [2021-03-10 22:31:40,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:31:40,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:40,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:31:40,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:31:40,955 INFO L87 Difference]: Start difference. First operand 1496 states and 6149 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:41,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:41,235 INFO L93 Difference]: Finished difference Result 3298 states and 12722 transitions. [2021-03-10 22:31:41,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:31:41,236 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:41,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:41,243 INFO L225 Difference]: With dead ends: 3298 [2021-03-10 22:31:41,243 INFO L226 Difference]: Without dead ends: 3044 [2021-03-10 22:31:41,244 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:31:41,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2021-03-10 22:31:41,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 1857. [2021-03-10 22:31:41,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 4.1438577586206895) internal successors, (7691), 1856 states have internal predecessors, (7691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 7691 transitions. [2021-03-10 22:31:41,317 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 7691 transitions. Word has length 28 [2021-03-10 22:31:41,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:41,317 INFO L480 AbstractCegarLoop]: Abstraction has 1857 states and 7691 transitions. [2021-03-10 22:31:41,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:41,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 7691 transitions. [2021-03-10 22:31:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:41,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:41,322 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:41,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:41,522 INFO L428 AbstractCegarLoop]: === Iteration 99 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:41,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1769348101, now seen corresponding path program 23 times [2021-03-10 22:31:41,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:41,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148112581] [2021-03-10 22:31:41,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:41,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148112581] [2021-03-10 22:31:41,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967478323] [2021-03-10 22:31:41,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:41,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:31:41,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:41,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:41,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:41,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:41,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:31:41,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268497264] [2021-03-10 22:31:41,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:41,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:41,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:41,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:41,672 INFO L87 Difference]: Start difference. First operand 1857 states and 7691 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:41,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:41,965 INFO L93 Difference]: Finished difference Result 3249 states and 12628 transitions. [2021-03-10 22:31:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:31:41,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:41,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:41,974 INFO L225 Difference]: With dead ends: 3249 [2021-03-10 22:31:41,975 INFO L226 Difference]: Without dead ends: 3151 [2021-03-10 22:31:41,975 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:41,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-03-10 22:31:42,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 1852. [2021-03-10 22:31:42,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 4.13290113452188) internal successors, (7650), 1851 states have internal predecessors, (7650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 7650 transitions. [2021-03-10 22:31:42,020 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 7650 transitions. Word has length 28 [2021-03-10 22:31:42,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:42,020 INFO L480 AbstractCegarLoop]: Abstraction has 1852 states and 7650 transitions. [2021-03-10 22:31:42,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:42,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 7650 transitions. [2021-03-10 22:31:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:42,024 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:42,024 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:42,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:42,225 INFO L428 AbstractCegarLoop]: === Iteration 100 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:42,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:42,225 INFO L82 PathProgramCache]: Analyzing trace with hash 292393427, now seen corresponding path program 24 times [2021-03-10 22:31:42,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:42,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685919899] [2021-03-10 22:31:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:42,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685919899] [2021-03-10 22:31:42,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237628459] [2021-03-10 22:31:42,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:42,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:31:42,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:42,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:42,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:42,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:42,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:31:42,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097516491] [2021-03-10 22:31:42,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:42,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:42,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:42,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:42,357 INFO L87 Difference]: Start difference. First operand 1852 states and 7650 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:42,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:42,551 INFO L93 Difference]: Finished difference Result 3569 states and 13833 transitions. [2021-03-10 22:31:42,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:31:42,552 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:42,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:42,560 INFO L225 Difference]: With dead ends: 3569 [2021-03-10 22:31:42,560 INFO L226 Difference]: Without dead ends: 3317 [2021-03-10 22:31:42,560 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:31:42,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3317 states. [2021-03-10 22:31:42,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3317 to 2221. [2021-03-10 22:31:42,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2221 states, 2220 states have (on average 4.201351351351351) internal successors, (9327), 2220 states have internal predecessors, (9327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 9327 transitions. [2021-03-10 22:31:42,613 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 9327 transitions. Word has length 28 [2021-03-10 22:31:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:42,613 INFO L480 AbstractCegarLoop]: Abstraction has 2221 states and 9327 transitions. [2021-03-10 22:31:42,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 9327 transitions. [2021-03-10 22:31:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:42,617 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:42,617 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:42,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:42,817 INFO L428 AbstractCegarLoop]: === Iteration 101 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:42,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:42,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1655877393, now seen corresponding path program 25 times [2021-03-10 22:31:42,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:42,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716434083] [2021-03-10 22:31:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:42,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716434083] [2021-03-10 22:31:42,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742858320] [2021-03-10 22:31:42,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:42,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:42,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:42,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:42,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 22:31:42,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337186106] [2021-03-10 22:31:42,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:31:42,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:42,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:31:42,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:31:42,962 INFO L87 Difference]: Start difference. First operand 2221 states and 9327 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:43,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:43,302 INFO L93 Difference]: Finished difference Result 5363 states and 21241 transitions. [2021-03-10 22:31:43,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:31:43,303 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:43,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:43,316 INFO L225 Difference]: With dead ends: 5363 [2021-03-10 22:31:43,317 INFO L226 Difference]: Without dead ends: 5161 [2021-03-10 22:31:43,317 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:31:43,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-03-10 22:31:43,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 2722. [2021-03-10 22:31:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 4.300624770305035) internal successors, (11702), 2721 states have internal predecessors, (11702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 11702 transitions. [2021-03-10 22:31:43,396 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 11702 transitions. Word has length 28 [2021-03-10 22:31:43,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:43,396 INFO L480 AbstractCegarLoop]: Abstraction has 2722 states and 11702 transitions. [2021-03-10 22:31:43,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:43,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 11702 transitions. [2021-03-10 22:31:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:43,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:43,402 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:43,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:43,615 INFO L428 AbstractCegarLoop]: === Iteration 102 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:43,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1838985111, now seen corresponding path program 26 times [2021-03-10 22:31:43,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:43,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955083749] [2021-03-10 22:31:43,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:43,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955083749] [2021-03-10 22:31:43,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603844825] [2021-03-10 22:31:43,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:43,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:43,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:43,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:43,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:43,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:43,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:31:43,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170579167] [2021-03-10 22:31:43,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:43,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:43,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:43,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:43,752 INFO L87 Difference]: Start difference. First operand 2722 states and 11702 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:44,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:44,006 INFO L93 Difference]: Finished difference Result 3984 states and 16212 transitions. [2021-03-10 22:31:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:31:44,007 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:44,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:44,017 INFO L225 Difference]: With dead ends: 3984 [2021-03-10 22:31:44,018 INFO L226 Difference]: Without dead ends: 3895 [2021-03-10 22:31:44,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:31:44,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3895 states. [2021-03-10 22:31:44,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3895 to 2791. [2021-03-10 22:31:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 4.337992831541219) internal successors, (12103), 2790 states have internal predecessors, (12103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 12103 transitions. [2021-03-10 22:31:44,084 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 12103 transitions. Word has length 28 [2021-03-10 22:31:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:44,084 INFO L480 AbstractCegarLoop]: Abstraction has 2791 states and 12103 transitions. [2021-03-10 22:31:44,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:44,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 12103 transitions. [2021-03-10 22:31:44,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:44,090 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:44,090 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:44,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:44,291 INFO L428 AbstractCegarLoop]: === Iteration 103 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:44,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:44,291 INFO L82 PathProgramCache]: Analyzing trace with hash 931528637, now seen corresponding path program 27 times [2021-03-10 22:31:44,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:44,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816311432] [2021-03-10 22:31:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:44,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816311432] [2021-03-10 22:31:44,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792084033] [2021-03-10 22:31:44,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:44,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:31:44,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:44,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:44,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:44,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:44,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:31:44,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682045435] [2021-03-10 22:31:44,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:44,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:44,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:44,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:44,429 INFO L87 Difference]: Start difference. First operand 2791 states and 12103 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:44,695 INFO L93 Difference]: Finished difference Result 5795 states and 23459 transitions. [2021-03-10 22:31:44,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:31:44,696 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:44,711 INFO L225 Difference]: With dead ends: 5795 [2021-03-10 22:31:44,711 INFO L226 Difference]: Without dead ends: 5676 [2021-03-10 22:31:44,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:31:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-03-10 22:31:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 3317. [2021-03-10 22:31:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3317 states, 3316 states have (on average 4.408926417370326) internal successors, (14620), 3316 states have internal predecessors, (14620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:44,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 14620 transitions. [2021-03-10 22:31:44,805 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 14620 transitions. Word has length 28 [2021-03-10 22:31:44,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:44,805 INFO L480 AbstractCegarLoop]: Abstraction has 3317 states and 14620 transitions. [2021-03-10 22:31:44,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:44,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 14620 transitions. [2021-03-10 22:31:44,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:44,812 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:44,812 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:45,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:45,013 INFO L428 AbstractCegarLoop]: === Iteration 104 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:45,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2051339415, now seen corresponding path program 28 times [2021-03-10 22:31:45,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:45,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457448137] [2021-03-10 22:31:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:45,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457448137] [2021-03-10 22:31:45,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966868688] [2021-03-10 22:31:45,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:45,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:45,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:45,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:45,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:45,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:45,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:31:45,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080704605] [2021-03-10 22:31:45,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:45,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:45,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:45,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:45,187 INFO L87 Difference]: Start difference. First operand 3317 states and 14620 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:45,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:45,483 INFO L93 Difference]: Finished difference Result 5598 states and 22674 transitions. [2021-03-10 22:31:45,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:31:45,483 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:45,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:45,498 INFO L225 Difference]: With dead ends: 5598 [2021-03-10 22:31:45,499 INFO L226 Difference]: Without dead ends: 5510 [2021-03-10 22:31:45,499 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:31:45,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2021-03-10 22:31:45,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 3445. [2021-03-10 22:31:45,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3444 states have (on average 4.398664343786295) internal successors, (15149), 3444 states have internal predecessors, (15149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 15149 transitions. [2021-03-10 22:31:45,593 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 15149 transitions. Word has length 28 [2021-03-10 22:31:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:45,593 INFO L480 AbstractCegarLoop]: Abstraction has 3445 states and 15149 transitions. [2021-03-10 22:31:45,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 15149 transitions. [2021-03-10 22:31:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:45,601 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:45,601 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:45,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:45,802 INFO L428 AbstractCegarLoop]: === Iteration 105 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:45,802 INFO L82 PathProgramCache]: Analyzing trace with hash -11324181, now seen corresponding path program 29 times [2021-03-10 22:31:45,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:45,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395153080] [2021-03-10 22:31:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:45,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395153080] [2021-03-10 22:31:45,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263070283] [2021-03-10 22:31:45,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:45,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:31:45,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:45,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:45,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:45,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:45,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:31:45,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568657181] [2021-03-10 22:31:45,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:45,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:45,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:45,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:45,937 INFO L87 Difference]: Start difference. First operand 3445 states and 15149 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:46,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:46,173 INFO L93 Difference]: Finished difference Result 4269 states and 18217 transitions. [2021-03-10 22:31:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:31:46,174 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:46,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:46,186 INFO L225 Difference]: With dead ends: 4269 [2021-03-10 22:31:46,187 INFO L226 Difference]: Without dead ends: 4269 [2021-03-10 22:31:46,187 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:31:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4269 states. [2021-03-10 22:31:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4269 to 3397. [2021-03-10 22:31:46,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3396 states have (on average 4.38545347467609) internal successors, (14893), 3396 states have internal predecessors, (14893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:46,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 14893 transitions. [2021-03-10 22:31:46,277 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 14893 transitions. Word has length 28 [2021-03-10 22:31:46,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:46,277 INFO L480 AbstractCegarLoop]: Abstraction has 3397 states and 14893 transitions. [2021-03-10 22:31:46,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:46,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 14893 transitions. [2021-03-10 22:31:46,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:46,284 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:46,284 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:46,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-03-10 22:31:46,499 INFO L428 AbstractCegarLoop]: === Iteration 106 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:46,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:46,499 INFO L82 PathProgramCache]: Analyzing trace with hash 956315095, now seen corresponding path program 30 times [2021-03-10 22:31:46,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:46,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236412229] [2021-03-10 22:31:46,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:46,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236412229] [2021-03-10 22:31:46,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108988955] [2021-03-10 22:31:46,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:46,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:31:46,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:46,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:46,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:46,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:46,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:31:46,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295060775] [2021-03-10 22:31:46,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:46,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:46,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:46,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:46,637 INFO L87 Difference]: Start difference. First operand 3397 states and 14893 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:46,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:46,992 INFO L93 Difference]: Finished difference Result 5336 states and 21844 transitions. [2021-03-10 22:31:46,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:31:46,993 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:46,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:47,007 INFO L225 Difference]: With dead ends: 5336 [2021-03-10 22:31:47,007 INFO L226 Difference]: Without dead ends: 5222 [2021-03-10 22:31:47,007 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5222 states. [2021-03-10 22:31:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5222 to 3511. [2021-03-10 22:31:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 3510 states have (on average 4.41965811965812) internal successors, (15513), 3510 states have internal predecessors, (15513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 15513 transitions. [2021-03-10 22:31:47,096 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 15513 transitions. Word has length 28 [2021-03-10 22:31:47,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:47,096 INFO L480 AbstractCegarLoop]: Abstraction has 3511 states and 15513 transitions. [2021-03-10 22:31:47,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:47,096 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 15513 transitions. [2021-03-10 22:31:47,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:47,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:47,104 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:47,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-03-10 22:31:47,305 INFO L428 AbstractCegarLoop]: === Iteration 107 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:47,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:47,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1758521383, now seen corresponding path program 31 times [2021-03-10 22:31:47,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:47,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903777521] [2021-03-10 22:31:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:47,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903777521] [2021-03-10 22:31:47,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058406221] [2021-03-10 22:31:47,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:47,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:47,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:47,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:47,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:31:47,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085096599] [2021-03-10 22:31:47,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:47,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:47,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:47,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:47,433 INFO L87 Difference]: Start difference. First operand 3511 states and 15513 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:47,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:47,646 INFO L93 Difference]: Finished difference Result 6122 states and 25138 transitions. [2021-03-10 22:31:47,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:31:47,647 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:47,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:47,662 INFO L225 Difference]: With dead ends: 6122 [2021-03-10 22:31:47,662 INFO L226 Difference]: Without dead ends: 5828 [2021-03-10 22:31:47,663 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:47,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2021-03-10 22:31:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 3569. [2021-03-10 22:31:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 3568 states have (on average 4.414237668161435) internal successors, (15750), 3568 states have internal predecessors, (15750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 15750 transitions. [2021-03-10 22:31:47,794 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 15750 transitions. Word has length 28 [2021-03-10 22:31:47,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:47,795 INFO L480 AbstractCegarLoop]: Abstraction has 3569 states and 15750 transitions. [2021-03-10 22:31:47,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 15750 transitions. [2021-03-10 22:31:47,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:47,804 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:47,804 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:48,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-03-10 22:31:48,019 INFO L428 AbstractCegarLoop]: === Iteration 108 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:48,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:48,019 INFO L82 PathProgramCache]: Analyzing trace with hash -520222033, now seen corresponding path program 32 times [2021-03-10 22:31:48,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:48,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406307830] [2021-03-10 22:31:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:48,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406307830] [2021-03-10 22:31:48,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524779464] [2021-03-10 22:31:48,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:48,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:48,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:48,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:48,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:48,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:48,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:31:48,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451785710] [2021-03-10 22:31:48,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:48,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:48,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:48,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:48,150 INFO L87 Difference]: Start difference. First operand 3569 states and 15750 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:48,462 INFO L93 Difference]: Finished difference Result 5817 states and 23783 transitions. [2021-03-10 22:31:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:31:48,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:48,478 INFO L225 Difference]: With dead ends: 5817 [2021-03-10 22:31:48,478 INFO L226 Difference]: Without dead ends: 5666 [2021-03-10 22:31:48,478 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:31:48,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2021-03-10 22:31:48,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 3449. [2021-03-10 22:31:48,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3448 states have (on average 4.444605568445476) internal successors, (15325), 3448 states have internal predecessors, (15325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 15325 transitions. [2021-03-10 22:31:48,581 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 15325 transitions. Word has length 28 [2021-03-10 22:31:48,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:48,581 INFO L480 AbstractCegarLoop]: Abstraction has 3449 states and 15325 transitions. [2021-03-10 22:31:48,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 15325 transitions. [2021-03-10 22:31:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:48,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:48,589 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:48,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:48,789 INFO L428 AbstractCegarLoop]: === Iteration 109 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:48,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1821034983, now seen corresponding path program 33 times [2021-03-10 22:31:48,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:48,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798777512] [2021-03-10 22:31:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:48,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798777512] [2021-03-10 22:31:48,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561683804] [2021-03-10 22:31:48,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:48,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:31:48,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:48,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:48,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:48,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:48,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 22:31:48,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728748296] [2021-03-10 22:31:48,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:31:48,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:48,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:31:48,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:31:48,913 INFO L87 Difference]: Start difference. First operand 3449 states and 15325 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:49,074 INFO L93 Difference]: Finished difference Result 4110 states and 17975 transitions. [2021-03-10 22:31:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:31:49,075 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:49,086 INFO L225 Difference]: With dead ends: 4110 [2021-03-10 22:31:49,086 INFO L226 Difference]: Without dead ends: 4067 [2021-03-10 22:31:49,087 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:49,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4067 states. [2021-03-10 22:31:49,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4067 to 3438. [2021-03-10 22:31:49,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 4.451556590049462) internal successors, (15300), 3437 states have internal predecessors, (15300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 15300 transitions. [2021-03-10 22:31:49,161 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 15300 transitions. Word has length 28 [2021-03-10 22:31:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:49,161 INFO L480 AbstractCegarLoop]: Abstraction has 3438 states and 15300 transitions. [2021-03-10 22:31:49,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 15300 transitions. [2021-03-10 22:31:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:49,168 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:49,168 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:49,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-03-10 22:31:49,401 INFO L428 AbstractCegarLoop]: === Iteration 110 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:49,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:49,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1143597769, now seen corresponding path program 34 times [2021-03-10 22:31:49,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:49,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490952146] [2021-03-10 22:31:49,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:49,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490952146] [2021-03-10 22:31:49,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113895234] [2021-03-10 22:31:49,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:49,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:49,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:49,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:49,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:49,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:49,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 22:31:49,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39638837] [2021-03-10 22:31:49,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:31:49,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:49,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:31:49,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:31:49,540 INFO L87 Difference]: Start difference. First operand 3438 states and 15300 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:49,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:49,679 INFO L93 Difference]: Finished difference Result 4436 states and 19277 transitions. [2021-03-10 22:31:49,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:31:49,680 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:49,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:49,692 INFO L225 Difference]: With dead ends: 4436 [2021-03-10 22:31:49,693 INFO L226 Difference]: Without dead ends: 4436 [2021-03-10 22:31:49,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:49,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-03-10 22:31:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3438. [2021-03-10 22:31:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 4.442828047716032) internal successors, (15270), 3437 states have internal predecessors, (15270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 15270 transitions. [2021-03-10 22:31:49,773 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 15270 transitions. Word has length 28 [2021-03-10 22:31:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:49,773 INFO L480 AbstractCegarLoop]: Abstraction has 3438 states and 15270 transitions. [2021-03-10 22:31:49,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:49,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 15270 transitions. [2021-03-10 22:31:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:49,780 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:49,780 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:49,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:49,981 INFO L428 AbstractCegarLoop]: === Iteration 111 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:49,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:49,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1856145151, now seen corresponding path program 35 times [2021-03-10 22:31:49,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:49,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288470879] [2021-03-10 22:31:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:50,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288470879] [2021-03-10 22:31:50,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837622085] [2021-03-10 22:31:50,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:50,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:31:50,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:50,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:50,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:50,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:50,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 22:31:50,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854353477] [2021-03-10 22:31:50,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:31:50,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:50,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:31:50,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:31:50,124 INFO L87 Difference]: Start difference. First operand 3438 states and 15270 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:50,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:50,484 INFO L93 Difference]: Finished difference Result 5603 states and 22995 transitions. [2021-03-10 22:31:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:31:50,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:50,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:50,499 INFO L225 Difference]: With dead ends: 5603 [2021-03-10 22:31:50,500 INFO L226 Difference]: Without dead ends: 5426 [2021-03-10 22:31:50,500 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:31:50,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-03-10 22:31:50,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 3523. [2021-03-10 22:31:50,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3523 states, 3522 states have (on average 4.458262350936968) internal successors, (15702), 3522 states have internal predecessors, (15702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3523 states to 3523 states and 15702 transitions. [2021-03-10 22:31:50,593 INFO L78 Accepts]: Start accepts. Automaton has 3523 states and 15702 transitions. Word has length 28 [2021-03-10 22:31:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:50,593 INFO L480 AbstractCegarLoop]: Abstraction has 3523 states and 15702 transitions. [2021-03-10 22:31:50,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3523 states and 15702 transitions. [2021-03-10 22:31:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:50,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:50,601 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:50,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:50,802 INFO L428 AbstractCegarLoop]: === Iteration 112 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:50,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:50,802 INFO L82 PathProgramCache]: Analyzing trace with hash -398806911, now seen corresponding path program 36 times [2021-03-10 22:31:50,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:50,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334567480] [2021-03-10 22:31:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:50,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334567480] [2021-03-10 22:31:50,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358637081] [2021-03-10 22:31:50,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:50,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:31:50,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:50,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:50,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:50,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:50,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 22:31:50,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839256834] [2021-03-10 22:31:50,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:31:50,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:50,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:31:50,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:31:50,975 INFO L87 Difference]: Start difference. First operand 3523 states and 15702 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:51,247 INFO L93 Difference]: Finished difference Result 5173 states and 21715 transitions. [2021-03-10 22:31:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:31:51,247 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:51,260 INFO L225 Difference]: With dead ends: 5173 [2021-03-10 22:31:51,261 INFO L226 Difference]: Without dead ends: 4874 [2021-03-10 22:31:51,261 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:31:51,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2021-03-10 22:31:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 3688. [2021-03-10 22:31:51,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 4.490100352590182) internal successors, (16555), 3687 states have internal predecessors, (16555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 16555 transitions. [2021-03-10 22:31:51,330 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 16555 transitions. Word has length 28 [2021-03-10 22:31:51,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:51,330 INFO L480 AbstractCegarLoop]: Abstraction has 3688 states and 16555 transitions. [2021-03-10 22:31:51,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:51,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 16555 transitions. [2021-03-10 22:31:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:51,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:51,335 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:51,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:51,536 INFO L428 AbstractCegarLoop]: === Iteration 113 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:51,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:51,536 INFO L82 PathProgramCache]: Analyzing trace with hash 87221655, now seen corresponding path program 37 times [2021-03-10 22:31:51,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:51,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266827191] [2021-03-10 22:31:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:51,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266827191] [2021-03-10 22:31:51,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744733491] [2021-03-10 22:31:51,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:51,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:51,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:51,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:31:51,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836669987] [2021-03-10 22:31:51,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:51,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:51,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:51,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:51,672 INFO L87 Difference]: Start difference. First operand 3688 states and 16555 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:51,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:51,927 INFO L93 Difference]: Finished difference Result 4799 states and 20479 transitions. [2021-03-10 22:31:51,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:31:51,928 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:51,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:51,941 INFO L225 Difference]: With dead ends: 4799 [2021-03-10 22:31:51,941 INFO L226 Difference]: Without dead ends: 4701 [2021-03-10 22:31:51,941 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:31:51,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2021-03-10 22:31:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 3505. [2021-03-10 22:31:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3505 states, 3504 states have (on average 4.476027397260274) internal successors, (15684), 3504 states have internal predecessors, (15684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3505 states to 3505 states and 15684 transitions. [2021-03-10 22:31:52,021 INFO L78 Accepts]: Start accepts. Automaton has 3505 states and 15684 transitions. Word has length 28 [2021-03-10 22:31:52,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:52,022 INFO L480 AbstractCegarLoop]: Abstraction has 3505 states and 15684 transitions. [2021-03-10 22:31:52,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3505 states and 15684 transitions. [2021-03-10 22:31:52,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:52,029 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:52,029 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:52,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:52,231 INFO L428 AbstractCegarLoop]: === Iteration 114 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:52,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:52,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2146004113, now seen corresponding path program 38 times [2021-03-10 22:31:52,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:52,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435004903] [2021-03-10 22:31:52,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:52,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435004903] [2021-03-10 22:31:52,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793864503] [2021-03-10 22:31:52,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:52,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:52,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:52,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:52,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:52,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:52,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:31:52,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993378957] [2021-03-10 22:31:52,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:52,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:52,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:52,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:52,361 INFO L87 Difference]: Start difference. First operand 3505 states and 15684 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:52,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:52,585 INFO L93 Difference]: Finished difference Result 6407 states and 26477 transitions. [2021-03-10 22:31:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:31:52,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:52,603 INFO L225 Difference]: With dead ends: 6407 [2021-03-10 22:31:52,603 INFO L226 Difference]: Without dead ends: 6155 [2021-03-10 22:31:52,603 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:31:52,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6155 states. [2021-03-10 22:31:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6155 to 3796. [2021-03-10 22:31:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.4574440052700925) internal successors, (16916), 3795 states have internal predecessors, (16916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 16916 transitions. [2021-03-10 22:31:52,750 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 16916 transitions. Word has length 28 [2021-03-10 22:31:52,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:52,750 INFO L480 AbstractCegarLoop]: Abstraction has 3796 states and 16916 transitions. [2021-03-10 22:31:52,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:52,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 16916 transitions. [2021-03-10 22:31:52,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:52,758 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:52,758 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:52,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-03-10 22:31:52,958 INFO L428 AbstractCegarLoop]: === Iteration 115 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:52,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:52,959 INFO L82 PathProgramCache]: Analyzing trace with hash 200692363, now seen corresponding path program 39 times [2021-03-10 22:31:52,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:52,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370822610] [2021-03-10 22:31:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:52,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370822610] [2021-03-10 22:31:52,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173295341] [2021-03-10 22:31:52,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:53,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:31:53,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:53,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:53,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:53,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:53,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 22:31:53,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986460865] [2021-03-10 22:31:53,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:31:53,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:53,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:31:53,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:31:53,111 INFO L87 Difference]: Start difference. First operand 3796 states and 16916 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:53,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:53,451 INFO L93 Difference]: Finished difference Result 6642 states and 28034 transitions. [2021-03-10 22:31:53,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:31:53,452 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:53,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:53,470 INFO L225 Difference]: With dead ends: 6642 [2021-03-10 22:31:53,471 INFO L226 Difference]: Without dead ends: 6448 [2021-03-10 22:31:53,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:31:53,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6448 states. [2021-03-10 22:31:53,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6448 to 4066. [2021-03-10 22:31:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4066 states, 4065 states have (on average 4.525707257072571) internal successors, (18397), 4065 states have internal predecessors, (18397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4066 states to 4066 states and 18397 transitions. [2021-03-10 22:31:53,574 INFO L78 Accepts]: Start accepts. Automaton has 4066 states and 18397 transitions. Word has length 28 [2021-03-10 22:31:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:53,574 INFO L480 AbstractCegarLoop]: Abstraction has 4066 states and 18397 transitions. [2021-03-10 22:31:53,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 4066 states and 18397 transitions. [2021-03-10 22:31:53,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:53,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:53,583 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:53,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-10 22:31:53,783 INFO L428 AbstractCegarLoop]: === Iteration 116 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:53,784 INFO L82 PathProgramCache]: Analyzing trace with hash 17584645, now seen corresponding path program 40 times [2021-03-10 22:31:53,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:53,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871406555] [2021-03-10 22:31:53,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:53,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871406555] [2021-03-10 22:31:53,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159590766] [2021-03-10 22:31:53,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:53,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:53,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:53,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:53,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:53,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:53,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:31:53,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774074109] [2021-03-10 22:31:53,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:53,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:53,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:53,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:53,916 INFO L87 Difference]: Start difference. First operand 4066 states and 18397 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:54,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:54,232 INFO L93 Difference]: Finished difference Result 5715 states and 24180 transitions. [2021-03-10 22:31:54,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:31:54,233 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:54,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:54,248 INFO L225 Difference]: With dead ends: 5715 [2021-03-10 22:31:54,248 INFO L226 Difference]: Without dead ends: 5626 [2021-03-10 22:31:54,248 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2021-03-10 22:31:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 3989. [2021-03-10 22:31:54,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3989 states, 3988 states have (on average 4.533600802407221) internal successors, (18080), 3988 states have internal predecessors, (18080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3989 states to 3989 states and 18080 transitions. [2021-03-10 22:31:54,346 INFO L78 Accepts]: Start accepts. Automaton has 3989 states and 18080 transitions. Word has length 28 [2021-03-10 22:31:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:54,346 INFO L480 AbstractCegarLoop]: Abstraction has 3989 states and 18080 transitions. [2021-03-10 22:31:54,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3989 states and 18080 transitions. [2021-03-10 22:31:54,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:54,354 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:54,354 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:54,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:54,555 INFO L428 AbstractCegarLoop]: === Iteration 117 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:54,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:54,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1506868903, now seen corresponding path program 41 times [2021-03-10 22:31:54,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:54,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366575022] [2021-03-10 22:31:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:54,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366575022] [2021-03-10 22:31:54,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321861144] [2021-03-10 22:31:54,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:31:54,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:31:54,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:54,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:54,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:54,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:54,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 22:31:54,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391462658] [2021-03-10 22:31:54,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:54,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:54,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:54,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:54,724 INFO L87 Difference]: Start difference. First operand 3989 states and 18080 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:54,929 INFO L93 Difference]: Finished difference Result 6786 states and 28942 transitions. [2021-03-10 22:31:54,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:31:54,929 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:54,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:54,949 INFO L225 Difference]: With dead ends: 6786 [2021-03-10 22:31:54,950 INFO L226 Difference]: Without dead ends: 6667 [2021-03-10 22:31:54,950 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:31:54,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2021-03-10 22:31:55,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 3772. [2021-03-10 22:31:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3772 states, 3771 states have (on average 4.483426146910634) internal successors, (16907), 3771 states have internal predecessors, (16907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3772 states to 3772 states and 16907 transitions. [2021-03-10 22:31:55,057 INFO L78 Accepts]: Start accepts. Automaton has 3772 states and 16907 transitions. Word has length 28 [2021-03-10 22:31:55,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:55,057 INFO L480 AbstractCegarLoop]: Abstraction has 3772 states and 16907 transitions. [2021-03-10 22:31:55,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:55,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3772 states and 16907 transitions. [2021-03-10 22:31:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:55,065 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:55,065 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:55,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-03-10 22:31:55,267 INFO L428 AbstractCegarLoop]: === Iteration 118 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:55,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1298098363, now seen corresponding path program 42 times [2021-03-10 22:31:55,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:55,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960040146] [2021-03-10 22:31:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:55,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960040146] [2021-03-10 22:31:55,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373894745] [2021-03-10 22:31:55,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:55,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:31:55,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:55,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:55,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:55,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:55,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 22:31:55,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236189218] [2021-03-10 22:31:55,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:31:55,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:55,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:31:55,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:31:55,410 INFO L87 Difference]: Start difference. First operand 3772 states and 16907 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:55,592 INFO L93 Difference]: Finished difference Result 4650 states and 20206 transitions. [2021-03-10 22:31:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:31:55,593 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:55,605 INFO L225 Difference]: With dead ends: 4650 [2021-03-10 22:31:55,605 INFO L226 Difference]: Without dead ends: 4486 [2021-03-10 22:31:55,605 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:55,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-03-10 22:31:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3725. [2021-03-10 22:31:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 4.506176154672395) internal successors, (16781), 3724 states have internal predecessors, (16781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 16781 transitions. [2021-03-10 22:31:55,672 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 16781 transitions. Word has length 28 [2021-03-10 22:31:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:55,672 INFO L480 AbstractCegarLoop]: Abstraction has 3725 states and 16781 transitions. [2021-03-10 22:31:55,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 16781 transitions. [2021-03-10 22:31:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:55,678 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:55,678 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:55,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:55,890 INFO L428 AbstractCegarLoop]: === Iteration 119 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:55,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:55,890 INFO L82 PathProgramCache]: Analyzing trace with hash 571732251, now seen corresponding path program 43 times [2021-03-10 22:31:55,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:55,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567181862] [2021-03-10 22:31:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:55,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567181862] [2021-03-10 22:31:55,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45855785] [2021-03-10 22:31:55,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:55,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:55,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:56,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:56,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 22:31:56,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725780630] [2021-03-10 22:31:56,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:31:56,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:56,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:31:56,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:31:56,011 INFO L87 Difference]: Start difference. First operand 3725 states and 16781 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:56,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:56,152 INFO L93 Difference]: Finished difference Result 4894 states and 21444 transitions. [2021-03-10 22:31:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:31:56,153 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:56,166 INFO L225 Difference]: With dead ends: 4894 [2021-03-10 22:31:56,166 INFO L226 Difference]: Without dead ends: 4894 [2021-03-10 22:31:56,166 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4894 states. [2021-03-10 22:31:56,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4894 to 3755. [2021-03-10 22:31:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 4.508790623335109) internal successors, (16926), 3754 states have internal predecessors, (16926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:56,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 16926 transitions. [2021-03-10 22:31:56,250 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 16926 transitions. Word has length 28 [2021-03-10 22:31:56,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:56,251 INFO L480 AbstractCegarLoop]: Abstraction has 3755 states and 16926 transitions. [2021-03-10 22:31:56,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:56,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 16926 transitions. [2021-03-10 22:31:56,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:56,303 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:56,303 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:56,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-03-10 22:31:56,504 INFO L428 AbstractCegarLoop]: === Iteration 120 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:56,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:56,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1136343519, now seen corresponding path program 44 times [2021-03-10 22:31:56,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:56,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345627836] [2021-03-10 22:31:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:56,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345627836] [2021-03-10 22:31:56,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215712633] [2021-03-10 22:31:56,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:56,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:56,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:56,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:56,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:56,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:56,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:31:56,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160154223] [2021-03-10 22:31:56,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:56,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:56,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:56,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:56,634 INFO L87 Difference]: Start difference. First operand 3755 states and 16926 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:56,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:56,916 INFO L93 Difference]: Finished difference Result 5651 states and 23907 transitions. [2021-03-10 22:31:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:31:56,917 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:56,932 INFO L225 Difference]: With dead ends: 5651 [2021-03-10 22:31:56,932 INFO L226 Difference]: Without dead ends: 5528 [2021-03-10 22:31:56,932 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:31:56,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5528 states. [2021-03-10 22:31:57,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5528 to 3782. [2021-03-10 22:31:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3782 states, 3781 states have (on average 4.539539804284581) internal successors, (17164), 3781 states have internal predecessors, (17164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:57,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3782 states to 3782 states and 17164 transitions. [2021-03-10 22:31:57,020 INFO L78 Accepts]: Start accepts. Automaton has 3782 states and 17164 transitions. Word has length 28 [2021-03-10 22:31:57,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:57,020 INFO L480 AbstractCegarLoop]: Abstraction has 3782 states and 17164 transitions. [2021-03-10 22:31:57,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:57,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3782 states and 17164 transitions. [2021-03-10 22:31:57,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:57,028 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:57,028 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:57,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:57,229 INFO L428 AbstractCegarLoop]: === Iteration 121 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:57,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1410972353, now seen corresponding path program 45 times [2021-03-10 22:31:57,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:57,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859821041] [2021-03-10 22:31:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:57,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859821041] [2021-03-10 22:31:57,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175673848] [2021-03-10 22:31:57,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:57,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:31:57,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:57,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:57,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:57,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:57,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:31:57,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206523965] [2021-03-10 22:31:57,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:57,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:57,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:57,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:57,357 INFO L87 Difference]: Start difference. First operand 3782 states and 17164 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:57,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:57,572 INFO L93 Difference]: Finished difference Result 4632 states and 20315 transitions. [2021-03-10 22:31:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:31:57,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:57,585 INFO L225 Difference]: With dead ends: 4632 [2021-03-10 22:31:57,585 INFO L226 Difference]: Without dead ends: 4632 [2021-03-10 22:31:57,585 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:31:57,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4632 states. [2021-03-10 22:31:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 3902. [2021-03-10 22:31:57,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3902 states, 3901 states have (on average 4.535247372468598) internal successors, (17692), 3901 states have internal predecessors, (17692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3902 states to 3902 states and 17692 transitions. [2021-03-10 22:31:57,668 INFO L78 Accepts]: Start accepts. Automaton has 3902 states and 17692 transitions. Word has length 28 [2021-03-10 22:31:57,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:57,668 INFO L480 AbstractCegarLoop]: Abstraction has 3902 states and 17692 transitions. [2021-03-10 22:31:57,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3902 states and 17692 transitions. [2021-03-10 22:31:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:57,676 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:57,676 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:57,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-03-10 22:31:57,877 INFO L428 AbstractCegarLoop]: === Iteration 122 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:57,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:57,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1216055663, now seen corresponding path program 46 times [2021-03-10 22:31:57,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:57,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955511388] [2021-03-10 22:31:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:57,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955511388] [2021-03-10 22:31:57,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521392833] [2021-03-10 22:31:57,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:57,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:57,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:57,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:57,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:58,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:58,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:31:58,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923486664] [2021-03-10 22:31:58,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:58,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:58,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:58,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:58,004 INFO L87 Difference]: Start difference. First operand 3902 states and 17692 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:58,330 INFO L93 Difference]: Finished difference Result 7832 states and 33399 transitions. [2021-03-10 22:31:58,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:31:58,331 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:58,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:58,389 INFO L225 Difference]: With dead ends: 7832 [2021-03-10 22:31:58,390 INFO L226 Difference]: Without dead ends: 7734 [2021-03-10 22:31:58,390 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:31:58,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7734 states. [2021-03-10 22:31:58,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7734 to 4483. [2021-03-10 22:31:58,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4483 states, 4482 states have (on average 4.557340473003124) internal successors, (20426), 4482 states have internal predecessors, (20426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4483 states to 4483 states and 20426 transitions. [2021-03-10 22:31:58,513 INFO L78 Accepts]: Start accepts. Automaton has 4483 states and 20426 transitions. Word has length 28 [2021-03-10 22:31:58,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:58,513 INFO L480 AbstractCegarLoop]: Abstraction has 4483 states and 20426 transitions. [2021-03-10 22:31:58,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:58,513 INFO L276 IsEmpty]: Start isEmpty. Operand 4483 states and 20426 transitions. [2021-03-10 22:31:58,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:58,522 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:58,522 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:58,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:58,723 INFO L428 AbstractCegarLoop]: === Iteration 123 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:58,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:58,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1753521871, now seen corresponding path program 47 times [2021-03-10 22:31:58,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:58,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746969624] [2021-03-10 22:31:58,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:58,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746969624] [2021-03-10 22:31:58,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115755040] [2021-03-10 22:31:58,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:58,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:31:58,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:58,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:58,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:58,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:58,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:31:58,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492745735] [2021-03-10 22:31:58,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:58,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:58,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:58,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:58,856 INFO L87 Difference]: Start difference. First operand 4483 states and 20426 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:59,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:59,067 INFO L93 Difference]: Finished difference Result 6775 states and 28653 transitions. [2021-03-10 22:31:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:31:59,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:59,087 INFO L225 Difference]: With dead ends: 6775 [2021-03-10 22:31:59,088 INFO L226 Difference]: Without dead ends: 6523 [2021-03-10 22:31:59,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:31:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6523 states. [2021-03-10 22:31:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6523 to 4878. [2021-03-10 22:31:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4878 states, 4877 states have (on average 4.533729751896658) internal successors, (22111), 4877 states have internal predecessors, (22111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4878 states to 4878 states and 22111 transitions. [2021-03-10 22:31:59,206 INFO L78 Accepts]: Start accepts. Automaton has 4878 states and 22111 transitions. Word has length 28 [2021-03-10 22:31:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:59,206 INFO L480 AbstractCegarLoop]: Abstraction has 4878 states and 22111 transitions. [2021-03-10 22:31:59,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4878 states and 22111 transitions. [2021-03-10 22:31:59,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:31:59,216 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:59,216 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:59,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:59,417 INFO L428 AbstractCegarLoop]: === Iteration 124 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:59,417 INFO L82 PathProgramCache]: Analyzing trace with hash 629820639, now seen corresponding path program 48 times [2021-03-10 22:31:59,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:59,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887276964] [2021-03-10 22:31:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:59,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887276964] [2021-03-10 22:31:59,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693032778] [2021-03-10 22:31:59,444 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 [2021-03-10 22:31:59,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:31:59,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:59,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:31:59,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:59,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:59,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:31:59,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664058309] [2021-03-10 22:31:59,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:31:59,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:59,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:31:59,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:31:59,547 INFO L87 Difference]: Start difference. First operand 4878 states and 22111 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:59,845 INFO L93 Difference]: Finished difference Result 5978 states and 25883 transitions. [2021-03-10 22:31:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:31:59,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:31:59,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:59,862 INFO L225 Difference]: With dead ends: 5978 [2021-03-10 22:31:59,863 INFO L226 Difference]: Without dead ends: 5889 [2021-03-10 22:31:59,863 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:59,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5889 states. [2021-03-10 22:32:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5889 to 4685. [2021-03-10 22:32:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 4684 states have (on average 4.536720751494449) internal successors, (21250), 4684 states have internal predecessors, (21250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:00,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 21250 transitions. [2021-03-10 22:32:00,041 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 21250 transitions. Word has length 28 [2021-03-10 22:32:00,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:00,041 INFO L480 AbstractCegarLoop]: Abstraction has 4685 states and 21250 transitions. [2021-03-10 22:32:00,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 21250 transitions. [2021-03-10 22:32:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:32:00,053 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:00,053 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:00,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:00,253 INFO L428 AbstractCegarLoop]: === Iteration 125 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:00,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:00,254 INFO L82 PathProgramCache]: Analyzing trace with hash -894632909, now seen corresponding path program 49 times [2021-03-10 22:32:00,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:00,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445379743] [2021-03-10 22:32:00,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:00,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445379743] [2021-03-10 22:32:00,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853201418] [2021-03-10 22:32:00,288 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 [2021-03-10 22:32:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:00,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:32:00,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:00,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:00,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:32:00,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92639859] [2021-03-10 22:32:00,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:32:00,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:00,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:32:00,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:32:00,422 INFO L87 Difference]: Start difference. First operand 4685 states and 21250 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:00,679 INFO L93 Difference]: Finished difference Result 7586 states and 32323 transitions. [2021-03-10 22:32:00,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:32:00,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 22:32:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:00,704 INFO L225 Difference]: With dead ends: 7586 [2021-03-10 22:32:00,705 INFO L226 Difference]: Without dead ends: 7449 [2021-03-10 22:32:00,705 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:32:00,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7449 states. [2021-03-10 22:32:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7449 to 4472. [2021-03-10 22:32:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4472 states, 4471 states have (on average 4.534779691344219) internal successors, (20275), 4471 states have internal predecessors, (20275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 20275 transitions. [2021-03-10 22:32:00,844 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 20275 transitions. Word has length 28 [2021-03-10 22:32:00,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:00,844 INFO L480 AbstractCegarLoop]: Abstraction has 4472 states and 20275 transitions. [2021-03-10 22:32:00,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 20275 transitions. [2021-03-10 22:32:00,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:00,854 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:00,854 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:01,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:01,054 INFO L428 AbstractCegarLoop]: === Iteration 126 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:01,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:01,055 INFO L82 PathProgramCache]: Analyzing trace with hash -2020102972, now seen corresponding path program 50 times [2021-03-10 22:32:01,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:01,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703447598] [2021-03-10 22:32:01,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:01,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703447598] [2021-03-10 22:32:01,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634780373] [2021-03-10 22:32:01,352 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 [2021-03-10 22:32:01,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:01,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:01,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:32:01,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:01,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:01,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:01,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:01,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:01,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-03-10 22:32:01,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:01,944 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-03-10 22:32:01,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:01,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-03-10 22:32:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:02,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:02,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-03-10 22:32:02,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964331288] [2021-03-10 22:32:02,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:32:02,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:02,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:32:02,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:32:02,021 INFO L87 Difference]: Start difference. First operand 4472 states and 20275 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:04,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:04,031 INFO L93 Difference]: Finished difference Result 5694 states and 24665 transitions. [2021-03-10 22:32:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:32:04,032 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:04,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:04,048 INFO L225 Difference]: With dead ends: 5694 [2021-03-10 22:32:04,048 INFO L226 Difference]: Without dead ends: 5532 [2021-03-10 22:32:04,048 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1292.6ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:32:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2021-03-10 22:32:04,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 4549. [2021-03-10 22:32:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4549 states, 4548 states have (on average 4.516051011433597) internal successors, (20539), 4548 states have internal predecessors, (20539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:04,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4549 states to 4549 states and 20539 transitions. [2021-03-10 22:32:04,154 INFO L78 Accepts]: Start accepts. Automaton has 4549 states and 20539 transitions. Word has length 30 [2021-03-10 22:32:04,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:04,154 INFO L480 AbstractCegarLoop]: Abstraction has 4549 states and 20539 transitions. [2021-03-10 22:32:04,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:04,154 INFO L276 IsEmpty]: Start isEmpty. Operand 4549 states and 20539 transitions. [2021-03-10 22:32:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:04,163 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:04,164 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:04,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:04,387 INFO L428 AbstractCegarLoop]: === Iteration 127 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:04,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:04,387 INFO L82 PathProgramCache]: Analyzing trace with hash -334675676, now seen corresponding path program 1 times [2021-03-10 22:32:04,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:04,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796012811] [2021-03-10 22:32:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:04,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796012811] [2021-03-10 22:32:04,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781222107] [2021-03-10 22:32:04,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:04,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:32:04,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:05,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:05,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:05,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:05,050 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 [2021-03-10 22:32:05,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:05,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:05,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:05,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-03-10 22:32:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:05,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:05,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-03-10 22:32:05,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136470448] [2021-03-10 22:32:05,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:05,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:05,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:05,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:05,124 INFO L87 Difference]: Start difference. First operand 4549 states and 20539 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:06,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:06,728 INFO L93 Difference]: Finished difference Result 5260 states and 23354 transitions. [2021-03-10 22:32:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:32:06,729 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:06,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:06,744 INFO L225 Difference]: With dead ends: 5260 [2021-03-10 22:32:06,744 INFO L226 Difference]: Without dead ends: 5187 [2021-03-10 22:32:06,744 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 904.7ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:32:06,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5187 states. [2021-03-10 22:32:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5187 to 4573. [2021-03-10 22:32:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4573 states, 4572 states have (on average 4.5150918635170605) internal successors, (20643), 4572 states have internal predecessors, (20643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4573 states to 4573 states and 20643 transitions. [2021-03-10 22:32:06,850 INFO L78 Accepts]: Start accepts. Automaton has 4573 states and 20643 transitions. Word has length 30 [2021-03-10 22:32:06,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:06,850 INFO L480 AbstractCegarLoop]: Abstraction has 4573 states and 20643 transitions. [2021-03-10 22:32:06,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:06,850 INFO L276 IsEmpty]: Start isEmpty. Operand 4573 states and 20643 transitions. [2021-03-10 22:32:06,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:06,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:06,860 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:07,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-03-10 22:32:07,063 INFO L428 AbstractCegarLoop]: === Iteration 128 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:07,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:07,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1057468870, now seen corresponding path program 2 times [2021-03-10 22:32:07,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:07,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037521503] [2021-03-10 22:32:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:07,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037521503] [2021-03-10 22:32:07,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464803695] [2021-03-10 22:32:07,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:07,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:07,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:07,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:32:07,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:07,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:07,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:07,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:07,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-03-10 22:32:07,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:07,781 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-03-10 22:32:07,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:07,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:14 [2021-03-10 22:32:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:07,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:07,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-03-10 22:32:07,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570614037] [2021-03-10 22:32:07,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:32:07,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:07,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:32:07,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:32:07,882 INFO L87 Difference]: Start difference. First operand 4573 states and 20643 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:09,278 INFO L93 Difference]: Finished difference Result 4953 states and 22062 transitions. [2021-03-10 22:32:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:32:09,279 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:09,289 INFO L225 Difference]: With dead ends: 4953 [2021-03-10 22:32:09,289 INFO L226 Difference]: Without dead ends: 4872 [2021-03-10 22:32:09,290 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1005.8ms TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:32:09,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2021-03-10 22:32:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 4581. [2021-03-10 22:32:09,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 4.513100436681222) internal successors, (20670), 4580 states have internal predecessors, (20670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 20670 transitions. [2021-03-10 22:32:09,387 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 20670 transitions. Word has length 30 [2021-03-10 22:32:09,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:09,387 INFO L480 AbstractCegarLoop]: Abstraction has 4581 states and 20670 transitions. [2021-03-10 22:32:09,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:09,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 20670 transitions. [2021-03-10 22:32:09,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:09,395 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:09,395 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:09,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-03-10 22:32:09,599 INFO L428 AbstractCegarLoop]: === Iteration 129 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:09,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:09,599 INFO L82 PathProgramCache]: Analyzing trace with hash 551122604, now seen corresponding path program 3 times [2021-03-10 22:32:09,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:09,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352749640] [2021-03-10 22:32:09,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:09,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352749640] [2021-03-10 22:32:09,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146822601] [2021-03-10 22:32:09,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:09,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:32:09,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:09,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:32:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:10,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:10,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:10,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:10,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-03-10 22:32:10,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:10,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:10,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:10,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-03-10 22:32:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:10,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:10,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-03-10 22:32:10,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079239116] [2021-03-10 22:32:10,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:10,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:10,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:10,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:10,267 INFO L87 Difference]: Start difference. First operand 4581 states and 20670 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:11,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:11,801 INFO L93 Difference]: Finished difference Result 5288 states and 23473 transitions. [2021-03-10 22:32:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:32:11,802 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:11,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:11,816 INFO L225 Difference]: With dead ends: 5288 [2021-03-10 22:32:11,816 INFO L226 Difference]: Without dead ends: 5215 [2021-03-10 22:32:11,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 879.2ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:32:11,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5215 states. [2021-03-10 22:32:11,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5215 to 4583. [2021-03-10 22:32:11,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4582 states have (on average 4.513531209079005) internal successors, (20681), 4582 states have internal predecessors, (20681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 20681 transitions. [2021-03-10 22:32:11,915 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 20681 transitions. Word has length 30 [2021-03-10 22:32:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:11,915 INFO L480 AbstractCegarLoop]: Abstraction has 4583 states and 20681 transitions. [2021-03-10 22:32:11,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 20681 transitions. [2021-03-10 22:32:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:11,924 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:11,924 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:12,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:12,125 INFO L428 AbstractCegarLoop]: === Iteration 130 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:12,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:12,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1527142108, now seen corresponding path program 4 times [2021-03-10 22:32:12,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:12,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197940786] [2021-03-10 22:32:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:12,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197940786] [2021-03-10 22:32:12,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755217815] [2021-03-10 22:32:12,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:12,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:12,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:12,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:32:12,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:12,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-03-10 22:32:12,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:12,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:12,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:12,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-03-10 22:32:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:12,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:12,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 22:32:12,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965776310] [2021-03-10 22:32:12,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:12,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:12,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:12,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:12,751 INFO L87 Difference]: Start difference. First operand 4583 states and 20681 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:14,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:14,630 INFO L93 Difference]: Finished difference Result 6197 states and 27339 transitions. [2021-03-10 22:32:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 22:32:14,630 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:14,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:14,647 INFO L225 Difference]: With dead ends: 6197 [2021-03-10 22:32:14,647 INFO L226 Difference]: Without dead ends: 6116 [2021-03-10 22:32:14,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1226.4ms TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:32:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2021-03-10 22:32:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 4656. [2021-03-10 22:32:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4656 states, 4655 states have (on average 4.501825993555316) internal successors, (20956), 4655 states have internal predecessors, (20956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4656 states to 4656 states and 20956 transitions. [2021-03-10 22:32:14,753 INFO L78 Accepts]: Start accepts. Automaton has 4656 states and 20956 transitions. Word has length 30 [2021-03-10 22:32:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:14,753 INFO L480 AbstractCegarLoop]: Abstraction has 4656 states and 20956 transitions. [2021-03-10 22:32:14,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 4656 states and 20956 transitions. [2021-03-10 22:32:14,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:14,762 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:14,762 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:14,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:14,967 INFO L428 AbstractCegarLoop]: === Iteration 131 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:14,967 INFO L82 PathProgramCache]: Analyzing trace with hash 158285188, now seen corresponding path program 21 times [2021-03-10 22:32:14,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:14,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032614795] [2021-03-10 22:32:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:15,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032614795] [2021-03-10 22:32:15,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806168474] [2021-03-10 22:32:15,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:15,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:32:15,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:15,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:32:15,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:15,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:15,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:15,534 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 [2021-03-10 22:32:15,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:15,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:15,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:15,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-10 22:32:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:15,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:15,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-03-10 22:32:15,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890480004] [2021-03-10 22:32:15,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:32:15,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:15,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:32:15,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:32:15,586 INFO L87 Difference]: Start difference. First operand 4656 states and 20956 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:17,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:17,557 INFO L93 Difference]: Finished difference Result 6304 states and 27617 transitions. [2021-03-10 22:32:17,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 22:32:17,557 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:17,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:17,575 INFO L225 Difference]: With dead ends: 6304 [2021-03-10 22:32:17,575 INFO L226 Difference]: Without dead ends: 6223 [2021-03-10 22:32:17,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1136.0ms TimeCoverageRelationStatistics Valid=278, Invalid=1614, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:32:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6223 states. [2021-03-10 22:32:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6223 to 4652. [2021-03-10 22:32:17,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 4.50505267684369) internal successors, (20953), 4651 states have internal predecessors, (20953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:17,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 20953 transitions. [2021-03-10 22:32:17,680 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 20953 transitions. Word has length 30 [2021-03-10 22:32:17,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:17,680 INFO L480 AbstractCegarLoop]: Abstraction has 4652 states and 20953 transitions. [2021-03-10 22:32:17,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 20953 transitions. [2021-03-10 22:32:17,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:17,689 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:17,689 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:17,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-03-10 22:32:17,890 INFO L428 AbstractCegarLoop]: === Iteration 132 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:17,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:17,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1970041248, now seen corresponding path program 5 times [2021-03-10 22:32:17,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:17,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91658017] [2021-03-10 22:32:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:18,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91658017] [2021-03-10 22:32:18,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770185957] [2021-03-10 22:32:18,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:18,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:32:18,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:18,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:32:18,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:18,352 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 [2021-03-10 22:32:18,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:18,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:18,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:18,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-03-10 22:32:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:18,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:18,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 22:32:18,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814940084] [2021-03-10 22:32:18,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:18,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:18,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:18,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:18,433 INFO L87 Difference]: Start difference. First operand 4652 states and 20953 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:20,258 INFO L93 Difference]: Finished difference Result 6187 states and 27312 transitions. [2021-03-10 22:32:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 22:32:20,259 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:20,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:20,275 INFO L225 Difference]: With dead ends: 6187 [2021-03-10 22:32:20,275 INFO L226 Difference]: Without dead ends: 6106 [2021-03-10 22:32:20,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1181.8ms TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:32:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2021-03-10 22:32:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 4662. [2021-03-10 22:32:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4662 states, 4661 states have (on average 4.503540012872774) internal successors, (20991), 4661 states have internal predecessors, (20991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:20,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4662 states to 4662 states and 20991 transitions. [2021-03-10 22:32:20,382 INFO L78 Accepts]: Start accepts. Automaton has 4662 states and 20991 transitions. Word has length 30 [2021-03-10 22:32:20,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:20,382 INFO L480 AbstractCegarLoop]: Abstraction has 4662 states and 20991 transitions. [2021-03-10 22:32:20,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 4662 states and 20991 transitions. [2021-03-10 22:32:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:20,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:20,392 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:20,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:20,592 INFO L428 AbstractCegarLoop]: === Iteration 133 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:20,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:20,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1818579782, now seen corresponding path program 6 times [2021-03-10 22:32:20,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:20,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263963723] [2021-03-10 22:32:20,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:20,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263963723] [2021-03-10 22:32:20,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381571145] [2021-03-10 22:32:20,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:32:20,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:32:20,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:20,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:32:20,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:21,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:21,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:21,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:21,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:21,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-03-10 22:32:21,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:21,234 INFO L628 ElimStorePlain]: treesize reduction 18, result has 60.0 percent of original size [2021-03-10 22:32:21,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:21,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-03-10 22:32:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:21,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:21,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-03-10 22:32:21,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901888561] [2021-03-10 22:32:21,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:32:21,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:21,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:32:21,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:32:21,389 INFO L87 Difference]: Start difference. First operand 4662 states and 20991 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:24,044 INFO L93 Difference]: Finished difference Result 6267 states and 27331 transitions. [2021-03-10 22:32:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 22:32:24,045 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:24,061 INFO L225 Difference]: With dead ends: 6267 [2021-03-10 22:32:24,061 INFO L226 Difference]: Without dead ends: 6121 [2021-03-10 22:32:24,061 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1871.2ms TimeCoverageRelationStatistics Valid=468, Invalid=2502, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 22:32:24,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6121 states. [2021-03-10 22:32:24,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6121 to 4638. [2021-03-10 22:32:24,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4637 states have (on average 4.509381065343972) internal successors, (20910), 4637 states have internal predecessors, (20910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 20910 transitions. [2021-03-10 22:32:24,196 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 20910 transitions. Word has length 30 [2021-03-10 22:32:24,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:24,196 INFO L480 AbstractCegarLoop]: Abstraction has 4638 states and 20910 transitions. [2021-03-10 22:32:24,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 20910 transitions. [2021-03-10 22:32:24,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:24,205 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:24,205 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:24,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:24,406 INFO L428 AbstractCegarLoop]: === Iteration 134 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:24,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:24,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1727284940, now seen corresponding path program 51 times [2021-03-10 22:32:24,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:24,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548772840] [2021-03-10 22:32:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:24,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548772840] [2021-03-10 22:32:24,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916771364] [2021-03-10 22:32:24,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:24,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:32:24,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:24,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:32:24,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:25,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:25,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:25,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:25,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-03-10 22:32:25,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:25,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:25,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:25,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:93 [2021-03-10 22:32:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:25,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:25,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-03-10 22:32:25,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526021049] [2021-03-10 22:32:25,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:32:25,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:25,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:32:25,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:32:25,340 INFO L87 Difference]: Start difference. First operand 4638 states and 20910 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:25,717 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-03-10 22:32:26,008 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-03-10 22:32:28,156 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-03-10 22:32:28,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:28,745 INFO L93 Difference]: Finished difference Result 5966 states and 25985 transitions. [2021-03-10 22:32:28,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 22:32:28,746 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:28,760 INFO L225 Difference]: With dead ends: 5966 [2021-03-10 22:32:28,760 INFO L226 Difference]: Without dead ends: 5651 [2021-03-10 22:32:28,760 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 2764.8ms TimeCoverageRelationStatistics Valid=413, Invalid=1939, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 22:32:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-03-10 22:32:28,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4651. [2021-03-10 22:32:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 4.51247311827957) internal successors, (20983), 4650 states have internal predecessors, (20983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 20983 transitions. [2021-03-10 22:32:28,862 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 20983 transitions. Word has length 30 [2021-03-10 22:32:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:28,863 INFO L480 AbstractCegarLoop]: Abstraction has 4651 states and 20983 transitions. [2021-03-10 22:32:28,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 20983 transitions. [2021-03-10 22:32:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:28,872 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:28,872 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:29,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-03-10 22:32:29,072 INFO L428 AbstractCegarLoop]: === Iteration 135 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:29,073 INFO L82 PathProgramCache]: Analyzing trace with hash 806718224, now seen corresponding path program 7 times [2021-03-10 22:32:29,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:29,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052917441] [2021-03-10 22:32:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:29,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052917441] [2021-03-10 22:32:29,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759006813] [2021-03-10 22:32:29,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:29,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:32:29,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:29,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:29,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:29,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:29,884 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 [2021-03-10 22:32:29,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:29,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:29,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:29,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-03-10 22:32:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:29,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:29,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 22:32:29,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262253789] [2021-03-10 22:32:29,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:32:29,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:29,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:32:29,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:32:29,992 INFO L87 Difference]: Start difference. First operand 4651 states and 20983 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:32,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:32,020 INFO L93 Difference]: Finished difference Result 5747 states and 25410 transitions. [2021-03-10 22:32:32,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 22:32:32,021 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:32,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:32,036 INFO L225 Difference]: With dead ends: 5747 [2021-03-10 22:32:32,036 INFO L226 Difference]: Without dead ends: 5666 [2021-03-10 22:32:32,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1331.5ms TimeCoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:32:32,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2021-03-10 22:32:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 4653. [2021-03-10 22:32:32,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 4.512897678417885) internal successors, (20994), 4652 states have internal predecessors, (20994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:32,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 20994 transitions. [2021-03-10 22:32:32,141 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 20994 transitions. Word has length 30 [2021-03-10 22:32:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:32,141 INFO L480 AbstractCegarLoop]: Abstraction has 4653 states and 20994 transitions. [2021-03-10 22:32:32,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 20994 transitions. [2021-03-10 22:32:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:32,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:32,150 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:32,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-03-10 22:32:32,351 INFO L428 AbstractCegarLoop]: === Iteration 136 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:32,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:32,351 INFO L82 PathProgramCache]: Analyzing trace with hash 594062564, now seen corresponding path program 52 times [2021-03-10 22:32:32,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:32,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637003803] [2021-03-10 22:32:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:32,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637003803] [2021-03-10 22:32:32,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908530654] [2021-03-10 22:32:32,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:32,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:32,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:32,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:32:32,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:33,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:33,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:33,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:33,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-10 22:32:33,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:33,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:33,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:33,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-03-10 22:32:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:33,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:33,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-03-10 22:32:33,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578570475] [2021-03-10 22:32:33,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:32:33,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:33,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:32:33,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:32:33,333 INFO L87 Difference]: Start difference. First operand 4653 states and 20994 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:34,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:34,928 INFO L93 Difference]: Finished difference Result 5264 states and 23407 transitions. [2021-03-10 22:32:34,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:32:34,928 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:34,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:34,942 INFO L225 Difference]: With dead ends: 5264 [2021-03-10 22:32:34,942 INFO L226 Difference]: Without dead ends: 5191 [2021-03-10 22:32:34,942 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1401.7ms TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:32:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5191 states. [2021-03-10 22:32:35,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5191 to 4670. [2021-03-10 22:32:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4670 states, 4669 states have (on average 4.512315270935961) internal successors, (21068), 4669 states have internal predecessors, (21068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4670 states to 4670 states and 21068 transitions. [2021-03-10 22:32:35,038 INFO L78 Accepts]: Start accepts. Automaton has 4670 states and 21068 transitions. Word has length 30 [2021-03-10 22:32:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:35,038 INFO L480 AbstractCegarLoop]: Abstraction has 4670 states and 21068 transitions. [2021-03-10 22:32:35,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 4670 states and 21068 transitions. [2021-03-10 22:32:35,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:35,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:35,047 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:35,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:35,248 INFO L428 AbstractCegarLoop]: === Iteration 137 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:35,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:35,248 INFO L82 PathProgramCache]: Analyzing trace with hash -801524512, now seen corresponding path program 53 times [2021-03-10 22:32:35,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:35,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622515013] [2021-03-10 22:32:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:35,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622515013] [2021-03-10 22:32:35,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789976588] [2021-03-10 22:32:35,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:35,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:32:35,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:35,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:32:35,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:35,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:35,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:35,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:35,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:35,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-03-10 22:32:35,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:35,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:35,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:35,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:91 [2021-03-10 22:32:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:36,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:36,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-03-10 22:32:36,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840971562] [2021-03-10 22:32:36,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:32:36,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:36,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:32:36,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:32:36,114 INFO L87 Difference]: Start difference. First operand 4670 states and 21068 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:38,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:38,788 INFO L93 Difference]: Finished difference Result 5699 states and 25183 transitions. [2021-03-10 22:32:38,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 22:32:38,795 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:38,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:38,810 INFO L225 Difference]: With dead ends: 5699 [2021-03-10 22:32:38,810 INFO L226 Difference]: Without dead ends: 5537 [2021-03-10 22:32:38,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 2085.0ms TimeCoverageRelationStatistics Valid=292, Invalid=2060, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 22:32:38,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5537 states. [2021-03-10 22:32:38,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5537 to 4663. [2021-03-10 22:32:38,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 4.513513513513513) internal successors, (21042), 4662 states have internal predecessors, (21042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:38,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 21042 transitions. [2021-03-10 22:32:38,911 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 21042 transitions. Word has length 30 [2021-03-10 22:32:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:38,912 INFO L480 AbstractCegarLoop]: Abstraction has 4663 states and 21042 transitions. [2021-03-10 22:32:38,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:38,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 21042 transitions. [2021-03-10 22:32:38,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:38,921 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:38,921 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:39,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-03-10 22:32:39,121 INFO L428 AbstractCegarLoop]: === Iteration 138 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:39,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:39,121 INFO L82 PathProgramCache]: Analyzing trace with hash 492452108, now seen corresponding path program 54 times [2021-03-10 22:32:39,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:39,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142710960] [2021-03-10 22:32:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:39,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142710960] [2021-03-10 22:32:39,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341107182] [2021-03-10 22:32:39,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:39,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:32:39,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:39,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:32:39,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:39,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:39,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:39,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:39,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 52 [2021-03-10 22:32:39,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:32:39,848 INFO L628 ElimStorePlain]: treesize reduction 47, result has 33.8 percent of original size [2021-03-10 22:32:39,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:39,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:24 [2021-03-10 22:32:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:40,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:40,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-03-10 22:32:40,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205519712] [2021-03-10 22:32:40,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 22:32:40,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:40,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 22:32:40,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:32:40,084 INFO L87 Difference]: Start difference. First operand 4663 states and 21042 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:43,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:43,228 INFO L93 Difference]: Finished difference Result 5925 states and 26103 transitions. [2021-03-10 22:32:43,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 22:32:43,229 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:43,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:43,244 INFO L225 Difference]: With dead ends: 5925 [2021-03-10 22:32:43,244 INFO L226 Difference]: Without dead ends: 5828 [2021-03-10 22:32:43,244 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1907.3ms TimeCoverageRelationStatistics Valid=276, Invalid=2076, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 22:32:43,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2021-03-10 22:32:43,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 4665. [2021-03-10 22:32:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 4.513936535162951) internal successors, (21053), 4664 states have internal predecessors, (21053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 21053 transitions. [2021-03-10 22:32:43,352 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 21053 transitions. Word has length 30 [2021-03-10 22:32:43,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:43,352 INFO L480 AbstractCegarLoop]: Abstraction has 4665 states and 21053 transitions. [2021-03-10 22:32:43,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:43,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 21053 transitions. [2021-03-10 22:32:43,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:43,361 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:43,361 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:43,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-03-10 22:32:43,562 INFO L428 AbstractCegarLoop]: === Iteration 139 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:43,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:43,562 INFO L82 PathProgramCache]: Analyzing trace with hash -172480814, now seen corresponding path program 8 times [2021-03-10 22:32:43,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:43,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587451037] [2021-03-10 22:32:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:43,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587451037] [2021-03-10 22:32:43,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858624221] [2021-03-10 22:32:43,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:43,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:43,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:43,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 22:32:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:44,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:44,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:44,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:44,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2021-03-10 22:32:44,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:44,470 INFO L628 ElimStorePlain]: treesize reduction 29, result has 56.7 percent of original size [2021-03-10 22:32:44,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:44,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:39 [2021-03-10 22:32:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:44,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:44,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-03-10 22:32:44,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126957231] [2021-03-10 22:32:44,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:32:44,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:44,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:32:44,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:32:44,608 INFO L87 Difference]: Start difference. First operand 4665 states and 21053 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:46,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:46,956 INFO L93 Difference]: Finished difference Result 6052 states and 26629 transitions. [2021-03-10 22:32:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 22:32:46,957 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:46,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:46,972 INFO L225 Difference]: With dead ends: 6052 [2021-03-10 22:32:46,973 INFO L226 Difference]: Without dead ends: 5971 [2021-03-10 22:32:46,973 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1567.7ms TimeCoverageRelationStatistics Valid=311, Invalid=1851, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 22:32:46,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2021-03-10 22:32:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 4663. [2021-03-10 22:32:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 4.513513513513513) internal successors, (21042), 4662 states have internal predecessors, (21042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 21042 transitions. [2021-03-10 22:32:47,079 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 21042 transitions. Word has length 30 [2021-03-10 22:32:47,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:47,079 INFO L480 AbstractCegarLoop]: Abstraction has 4663 states and 21042 transitions. [2021-03-10 22:32:47,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:47,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 21042 transitions. [2021-03-10 22:32:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:47,088 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:47,088 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:47,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:47,289 INFO L428 AbstractCegarLoop]: === Iteration 140 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:47,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1897976964, now seen corresponding path program 9 times [2021-03-10 22:32:47,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:47,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273239130] [2021-03-10 22:32:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:47,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273239130] [2021-03-10 22:32:47,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418508269] [2021-03-10 22:32:47,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:47,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:32:47,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:47,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:32:47,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:48,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:48,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:48,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:48,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-03-10 22:32:48,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:48,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:48,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:48,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:92 [2021-03-10 22:32:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:48,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:48,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-03-10 22:32:48,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028831751] [2021-03-10 22:32:48,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:32:48,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:48,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:32:48,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:32:48,406 INFO L87 Difference]: Start difference. First operand 4663 states and 21042 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:49,066 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-03-10 22:32:49,390 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 22:32:50,864 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-10 22:32:51,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:51,649 INFO L93 Difference]: Finished difference Result 5288 states and 23418 transitions. [2021-03-10 22:32:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:32:51,650 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:51,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:51,664 INFO L225 Difference]: With dead ends: 5288 [2021-03-10 22:32:51,664 INFO L226 Difference]: Without dead ends: 5206 [2021-03-10 22:32:51,664 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2370.9ms TimeCoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:32:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2021-03-10 22:32:51,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 4668. [2021-03-10 22:32:51,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 4.51339190057853) internal successors, (21064), 4667 states have internal predecessors, (21064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:51,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 21064 transitions. [2021-03-10 22:32:51,763 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 21064 transitions. Word has length 30 [2021-03-10 22:32:51,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:51,763 INFO L480 AbstractCegarLoop]: Abstraction has 4668 states and 21064 transitions. [2021-03-10 22:32:51,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:51,763 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 21064 transitions. [2021-03-10 22:32:51,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:51,773 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:51,773 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:51,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:51,982 INFO L428 AbstractCegarLoop]: === Iteration 141 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:51,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:51,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1365219982, now seen corresponding path program 10 times [2021-03-10 22:32:51,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:51,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415076122] [2021-03-10 22:32:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:52,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415076122] [2021-03-10 22:32:52,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822126075] [2021-03-10 22:32:52,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:52,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:52,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:52,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:32:52,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:52,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:52,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:52,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:52,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-10 22:32:52,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:52,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:52,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:52,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-03-10 22:32:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:52,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:52,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-03-10 22:32:52,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807747961] [2021-03-10 22:32:52,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:32:52,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:52,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:32:52,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:32:52,749 INFO L87 Difference]: Start difference. First operand 4668 states and 21064 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-03-10 22:32:53,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:53,942 INFO L93 Difference]: Finished difference Result 5291 states and 23516 transitions. [2021-03-10 22:32:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:32:53,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:53,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:53,956 INFO L225 Difference]: With dead ends: 5291 [2021-03-10 22:32:53,957 INFO L226 Difference]: Without dead ends: 5217 [2021-03-10 22:32:53,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 898.4ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:32:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5217 states. [2021-03-10 22:32:54,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5217 to 4664. [2021-03-10 22:32:54,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4664 states, 4663 states have (on average 4.514261205232683) internal successors, (21050), 4663 states have internal predecessors, (21050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4664 states to 4664 states and 21050 transitions. [2021-03-10 22:32:54,053 INFO L78 Accepts]: Start accepts. Automaton has 4664 states and 21050 transitions. Word has length 30 [2021-03-10 22:32:54,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:54,053 INFO L480 AbstractCegarLoop]: Abstraction has 4664 states and 21050 transitions. [2021-03-10 22:32:54,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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) [2021-03-10 22:32:54,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4664 states and 21050 transitions. [2021-03-10 22:32:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:54,063 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:54,063 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:54,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:54,263 INFO L428 AbstractCegarLoop]: === Iteration 142 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:54,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:54,264 INFO L82 PathProgramCache]: Analyzing trace with hash 87177790, now seen corresponding path program 55 times [2021-03-10 22:32:54,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:54,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907184755] [2021-03-10 22:32:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:54,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907184755] [2021-03-10 22:32:54,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656262244] [2021-03-10 22:32:54,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:54,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:32:54,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:54,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:32:54,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:54,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:32:54,974 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 [2021-03-10 22:32:54,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:32:54,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:32:54,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:32:54,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-03-10 22:32:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:55,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:55,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-03-10 22:32:55,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229850342] [2021-03-10 22:32:55,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:32:55,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:55,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:32:55,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:32:55,092 INFO L87 Difference]: Start difference. First operand 4664 states and 21050 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:56,569 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-03-10 22:32:58,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:58,761 INFO L93 Difference]: Finished difference Result 5878 states and 25735 transitions. [2021-03-10 22:32:58,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 22:32:58,762 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:32:58,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:58,776 INFO L225 Difference]: With dead ends: 5878 [2021-03-10 22:32:58,777 INFO L226 Difference]: Without dead ends: 5777 [2021-03-10 22:32:58,777 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2603.8ms TimeCoverageRelationStatistics Valid=322, Invalid=1934, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:32:58,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5777 states. [2021-03-10 22:32:58,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5777 to 4696. [2021-03-10 22:32:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4696 states, 4695 states have (on average 4.518849840255591) internal successors, (21216), 4695 states have internal predecessors, (21216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:58,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4696 states to 4696 states and 21216 transitions. [2021-03-10 22:32:58,877 INFO L78 Accepts]: Start accepts. Automaton has 4696 states and 21216 transitions. Word has length 30 [2021-03-10 22:32:58,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:58,877 INFO L480 AbstractCegarLoop]: Abstraction has 4696 states and 21216 transitions. [2021-03-10 22:32:58,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:58,877 INFO L276 IsEmpty]: Start isEmpty. Operand 4696 states and 21216 transitions. [2021-03-10 22:32:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:32:58,886 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:58,886 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:59,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-03-10 22:32:59,095 INFO L428 AbstractCegarLoop]: === Iteration 143 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:59,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:59,095 INFO L82 PathProgramCache]: Analyzing trace with hash -577755132, now seen corresponding path program 11 times [2021-03-10 22:32:59,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:59,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972953829] [2021-03-10 22:32:59,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:59,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972953829] [2021-03-10 22:32:59,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116217211] [2021-03-10 22:32:59,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:59,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:32:59,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:59,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:32:59,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:00,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:00,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:00,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:00,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:00,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-03-10 22:33:00,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:33:00,103 INFO L628 ElimStorePlain]: treesize reduction 27, result has 47.1 percent of original size [2021-03-10 22:33:00,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:00,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:18 [2021-03-10 22:33:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:00,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:00,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-03-10 22:33:00,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624045730] [2021-03-10 22:33:00,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:33:00,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:00,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:33:00,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:33:00,221 INFO L87 Difference]: Start difference. First operand 4696 states and 21216 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:03,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:03,101 INFO L93 Difference]: Finished difference Result 6056 states and 26644 transitions. [2021-03-10 22:33:03,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 22:33:03,102 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:33:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:03,118 INFO L225 Difference]: With dead ends: 6056 [2021-03-10 22:33:03,118 INFO L226 Difference]: Without dead ends: 5975 [2021-03-10 22:33:03,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2044.0ms TimeCoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 22:33:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5975 states. [2021-03-10 22:33:03,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5975 to 4704. [2021-03-10 22:33:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4703 states have (on average 4.516904103763555) internal successors, (21243), 4703 states have internal predecessors, (21243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 21243 transitions. [2021-03-10 22:33:03,223 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 21243 transitions. Word has length 30 [2021-03-10 22:33:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:03,223 INFO L480 AbstractCegarLoop]: Abstraction has 4704 states and 21243 transitions. [2021-03-10 22:33:03,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 21243 transitions. [2021-03-10 22:33:03,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:03,233 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:03,233 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:03,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-03-10 22:33:03,434 INFO L428 AbstractCegarLoop]: === Iteration 144 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:03,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:03,434 INFO L82 PathProgramCache]: Analyzing trace with hash -346038464, now seen corresponding path program 12 times [2021-03-10 22:33:03,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:03,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793759464] [2021-03-10 22:33:03,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:03,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793759464] [2021-03-10 22:33:03,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4304165] [2021-03-10 22:33:03,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:03,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:33:03,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:03,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:03,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:04,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:04,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:04,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:04,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-03-10 22:33:04,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 22:33:04,297 INFO L628 ElimStorePlain]: treesize reduction 16, result has 63.6 percent of original size [2021-03-10 22:33:04,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:04,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:22 [2021-03-10 22:33:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:04,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:04,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-03-10 22:33:04,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178388091] [2021-03-10 22:33:04,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:33:04,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:04,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:33:04,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:33:04,481 INFO L87 Difference]: Start difference. First operand 4704 states and 21243 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:07,310 INFO L93 Difference]: Finished difference Result 6255 states and 27383 transitions. [2021-03-10 22:33:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 22:33:07,311 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:33:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:07,327 INFO L225 Difference]: With dead ends: 6255 [2021-03-10 22:33:07,327 INFO L226 Difference]: Without dead ends: 6037 [2021-03-10 22:33:07,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1759.9ms TimeCoverageRelationStatistics Valid=300, Invalid=1862, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 22:33:07,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6037 states. [2021-03-10 22:33:07,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6037 to 4711. [2021-03-10 22:33:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4711 states, 4710 states have (on average 4.517409766454352) internal successors, (21277), 4710 states have internal predecessors, (21277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:07,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4711 states to 4711 states and 21277 transitions. [2021-03-10 22:33:07,441 INFO L78 Accepts]: Start accepts. Automaton has 4711 states and 21277 transitions. Word has length 30 [2021-03-10 22:33:07,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:07,441 INFO L480 AbstractCegarLoop]: Abstraction has 4711 states and 21277 transitions. [2021-03-10 22:33:07,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 4711 states and 21277 transitions. [2021-03-10 22:33:07,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:07,454 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:07,454 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:07,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:07,666 INFO L428 AbstractCegarLoop]: === Iteration 145 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:07,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:07,666 INFO L82 PathProgramCache]: Analyzing trace with hash -852384730, now seen corresponding path program 13 times [2021-03-10 22:33:07,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:07,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085579687] [2021-03-10 22:33:07,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:08,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085579687] [2021-03-10 22:33:08,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666021911] [2021-03-10 22:33:08,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:08,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:08,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:08,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:08,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:33:08,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:33:08,406 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 [2021-03-10 22:33:08,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:08,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:08,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:08,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-03-10 22:33:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:08,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:08,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 22:33:08,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53979074] [2021-03-10 22:33:08,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:33:08,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:08,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:33:08,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:33:08,532 INFO L87 Difference]: Start difference. First operand 4711 states and 21277 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:10,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:10,684 INFO L93 Difference]: Finished difference Result 5573 states and 24647 transitions. [2021-03-10 22:33:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:33:10,685 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:33:10,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:10,700 INFO L225 Difference]: With dead ends: 5573 [2021-03-10 22:33:10,700 INFO L226 Difference]: Without dead ends: 5500 [2021-03-10 22:33:10,701 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1222.9ms TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:33:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5500 states. [2021-03-10 22:33:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5500 to 4703. [2021-03-10 22:33:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 4.519353466609953) internal successors, (21250), 4702 states have internal predecessors, (21250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 21250 transitions. [2021-03-10 22:33:10,804 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 21250 transitions. Word has length 30 [2021-03-10 22:33:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:10,804 INFO L480 AbstractCegarLoop]: Abstraction has 4703 states and 21250 transitions. [2021-03-10 22:33:10,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:10,804 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 21250 transitions. [2021-03-10 22:33:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:10,814 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:10,814 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:11,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:11,014 INFO L428 AbstractCegarLoop]: === Iteration 146 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:11,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:11,015 INFO L82 PathProgramCache]: Analyzing trace with hash 496859426, now seen corresponding path program 14 times [2021-03-10 22:33:11,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:11,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252075690] [2021-03-10 22:33:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:11,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252075690] [2021-03-10 22:33:11,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708295978] [2021-03-10 22:33:11,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:11,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:33:11,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:11,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:33:11,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:11,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:33:11,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:11,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:11,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-03-10 22:33:11,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:11,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:11,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:11,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-03-10 22:33:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:12,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:12,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-03-10 22:33:12,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482460899] [2021-03-10 22:33:12,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:12,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:12,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:12,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:12,491 INFO L87 Difference]: Start difference. First operand 4703 states and 21250 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:13,130 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 22:33:13,360 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-03-10 22:33:14,507 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-10 22:33:15,184 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2021-03-10 22:33:15,476 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-10 22:33:15,754 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 22:33:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:17,073 INFO L93 Difference]: Finished difference Result 5168 states and 22940 transitions. [2021-03-10 22:33:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:33:17,074 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:33:17,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:17,087 INFO L225 Difference]: With dead ends: 5168 [2021-03-10 22:33:17,087 INFO L226 Difference]: Without dead ends: 5085 [2021-03-10 22:33:17,087 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 3256.5ms TimeCoverageRelationStatistics Valid=234, Invalid=1836, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:33:17,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5085 states. [2021-03-10 22:33:17,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5085 to 4715. [2021-03-10 22:33:17,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4715 states, 4714 states have (on average 4.518243529910904) internal successors, (21299), 4714 states have internal predecessors, (21299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 21299 transitions. [2021-03-10 22:33:17,176 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 21299 transitions. Word has length 30 [2021-03-10 22:33:17,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:17,179 INFO L480 AbstractCegarLoop]: Abstraction has 4715 states and 21299 transitions. [2021-03-10 22:33:17,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 21299 transitions. [2021-03-10 22:33:17,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:17,193 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:17,193 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:17,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:17,407 INFO L428 AbstractCegarLoop]: === Iteration 147 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:17,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:17,407 INFO L82 PathProgramCache]: Analyzing trace with hash -898727650, now seen corresponding path program 15 times [2021-03-10 22:33:17,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:17,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578787649] [2021-03-10 22:33:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:17,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578787649] [2021-03-10 22:33:17,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622888754] [2021-03-10 22:33:17,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:17,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:33:17,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:17,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:33:17,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:18,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:33:18,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:18,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-03-10 22:33:18,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:18,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:18,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:18,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-03-10 22:33:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:18,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:18,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-03-10 22:33:18,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259036416] [2021-03-10 22:33:18,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:18,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:18,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:18,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:18,715 INFO L87 Difference]: Start difference. First operand 4715 states and 21299 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:19,249 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 22:33:19,472 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-10 22:33:20,678 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 22:33:21,415 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2021-03-10 22:33:21,775 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 22:33:22,062 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 22:33:22,204 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 22:33:23,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:23,281 INFO L93 Difference]: Finished difference Result 5305 states and 23484 transitions. [2021-03-10 22:33:23,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 22:33:23,282 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:33:23,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:23,296 INFO L225 Difference]: With dead ends: 5305 [2021-03-10 22:33:23,296 INFO L226 Difference]: Without dead ends: 5206 [2021-03-10 22:33:23,296 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3296.6ms TimeCoverageRelationStatistics Valid=301, Invalid=1955, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:33:23,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2021-03-10 22:33:23,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 4706. [2021-03-10 22:33:23,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4706 states, 4705 states have (on average 4.519022316684378) internal successors, (21262), 4705 states have internal predecessors, (21262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4706 states to 4706 states and 21262 transitions. [2021-03-10 22:33:23,392 INFO L78 Accepts]: Start accepts. Automaton has 4706 states and 21262 transitions. Word has length 30 [2021-03-10 22:33:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:23,392 INFO L480 AbstractCegarLoop]: Abstraction has 4706 states and 21262 transitions. [2021-03-10 22:33:23,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 4706 states and 21262 transitions. [2021-03-10 22:33:23,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:23,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:23,402 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:23,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-03-10 22:33:23,602 INFO L428 AbstractCegarLoop]: === Iteration 148 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:23,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:23,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1262431236, now seen corresponding path program 16 times [2021-03-10 22:33:23,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:23,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13655158] [2021-03-10 22:33:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:24,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13655158] [2021-03-10 22:33:24,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306473329] [2021-03-10 22:33:24,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:24,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:33:24,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:24,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:24,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:24,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:24,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:33:24,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:33:24,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-10 22:33:24,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:24,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:24,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:24,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-03-10 22:33:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:24,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:24,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-03-10 22:33:24,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171792173] [2021-03-10 22:33:24,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:33:24,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:24,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:33:24,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:33:24,648 INFO L87 Difference]: Start difference. First operand 4706 states and 21262 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:26,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:26,747 INFO L93 Difference]: Finished difference Result 5331 states and 23716 transitions. [2021-03-10 22:33:26,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:33:26,748 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:33:26,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:26,761 INFO L225 Difference]: With dead ends: 5331 [2021-03-10 22:33:26,762 INFO L226 Difference]: Without dead ends: 5258 [2021-03-10 22:33:26,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1535.0ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:33:26,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5258 states. [2021-03-10 22:33:26,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5258 to 4711. [2021-03-10 22:33:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4711 states, 4710 states have (on average 4.518895966029724) internal successors, (21284), 4710 states have internal predecessors, (21284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:26,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4711 states to 4711 states and 21284 transitions. [2021-03-10 22:33:26,855 INFO L78 Accepts]: Start accepts. Automaton has 4711 states and 21284 transitions. Word has length 30 [2021-03-10 22:33:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:26,855 INFO L480 AbstractCegarLoop]: Abstraction has 4711 states and 21284 transitions. [2021-03-10 22:33:26,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 4711 states and 21284 transitions. [2021-03-10 22:33:26,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:26,863 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:26,863 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:27,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-03-10 22:33:27,063 INFO L428 AbstractCegarLoop]: === Iteration 149 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:27,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:27,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1795188218, now seen corresponding path program 17 times [2021-03-10 22:33:27,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:27,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455305109] [2021-03-10 22:33:27,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:27,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455305109] [2021-03-10 22:33:27,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316913591] [2021-03-10 22:33:27,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:27,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:33:27,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:27,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:27,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:27,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:27,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:27,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:27,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-03-10 22:33:27,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:27,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:28,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:28,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:220 [2021-03-10 22:33:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:28,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:28,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-03-10 22:33:28,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98045915] [2021-03-10 22:33:28,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:28,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:28,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:28,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:28,288 INFO L87 Difference]: Start difference. First operand 4711 states and 21284 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:30,630 INFO L93 Difference]: Finished difference Result 5534 states and 24661 transitions. [2021-03-10 22:33:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:33:30,632 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:33:30,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:30,646 INFO L225 Difference]: With dead ends: 5534 [2021-03-10 22:33:30,647 INFO L226 Difference]: Without dead ends: 5497 [2021-03-10 22:33:30,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1903.7ms TimeCoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:33:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5497 states. [2021-03-10 22:33:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5497 to 4714. [2021-03-10 22:33:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4714 states, 4713 states have (on average 4.517929132187566) internal successors, (21293), 4713 states have internal predecessors, (21293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4714 states to 4714 states and 21293 transitions. [2021-03-10 22:33:30,746 INFO L78 Accepts]: Start accepts. Automaton has 4714 states and 21293 transitions. Word has length 30 [2021-03-10 22:33:30,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:30,746 INFO L480 AbstractCegarLoop]: Abstraction has 4714 states and 21293 transitions. [2021-03-10 22:33:30,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 4714 states and 21293 transitions. [2021-03-10 22:33:30,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:30,756 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:30,756 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:30,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-03-10 22:33:30,957 INFO L428 AbstractCegarLoop]: === Iteration 150 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:30,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:30,957 INFO L82 PathProgramCache]: Analyzing trace with hash -913654306, now seen corresponding path program 18 times [2021-03-10 22:33:30,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:30,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277190157] [2021-03-10 22:33:30,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:31,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277190157] [2021-03-10 22:33:31,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139493385] [2021-03-10 22:33:31,632 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 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 [2021-03-10 22:33:31,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:33:31,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:31,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:33:31,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:31,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:31,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:31,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:31,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-03-10 22:33:31,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:31,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:31,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:31,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-03-10 22:33:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:32,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:32,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-03-10 22:33:32,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809992251] [2021-03-10 22:33:32,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:33:32,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:32,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:33:32,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:33:32,406 INFO L87 Difference]: Start difference. First operand 4714 states and 21293 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:33,403 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-03-10 22:33:33,839 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-03-10 22:33:34,472 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-10 22:33:35,262 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-03-10 22:33:35,648 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 22:33:36,686 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 22:33:38,590 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 22:33:38,968 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 22:33:39,145 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 22:33:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:39,550 INFO L93 Difference]: Finished difference Result 5898 states and 26039 transitions. [2021-03-10 22:33:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 22:33:39,551 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:33:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:39,566 INFO L225 Difference]: With dead ends: 5898 [2021-03-10 22:33:39,566 INFO L226 Difference]: Without dead ends: 5801 [2021-03-10 22:33:39,566 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 5834.6ms TimeCoverageRelationStatistics Valid=702, Invalid=4410, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 22:33:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-03-10 22:33:39,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 4732. [2021-03-10 22:33:39,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4732 states, 4731 states have (on average 4.515324455717607) internal successors, (21362), 4731 states have internal predecessors, (21362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4732 states to 4732 states and 21362 transitions. [2021-03-10 22:33:39,667 INFO L78 Accepts]: Start accepts. Automaton has 4732 states and 21362 transitions. Word has length 30 [2021-03-10 22:33:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:39,667 INFO L480 AbstractCegarLoop]: Abstraction has 4732 states and 21362 transitions. [2021-03-10 22:33:39,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:39,667 INFO L276 IsEmpty]: Start isEmpty. Operand 4732 states and 21362 transitions. [2021-03-10 22:33:39,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:39,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:39,677 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:39,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:39,877 INFO L428 AbstractCegarLoop]: === Iteration 151 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:39,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:39,878 INFO L82 PathProgramCache]: Analyzing trace with hash 654044294, now seen corresponding path program 19 times [2021-03-10 22:33:39,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:39,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354457083] [2021-03-10 22:33:39,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:40,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354457083] [2021-03-10 22:33:40,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286338385] [2021-03-10 22:33:40,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:40,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:33:40,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:40,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 22:33:40,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:33:40,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:33:40,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-10 22:33:40,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:40,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:40,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:40,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-03-10 22:33:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:40,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:40,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 22:33:40,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275407973] [2021-03-10 22:33:40,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:33:40,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:40,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:33:40,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:33:40,963 INFO L87 Difference]: Start difference. First operand 4732 states and 21362 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:41,232 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 22:33:41,571 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 22:33:41,901 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-03-10 22:33:42,387 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-03-10 22:33:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:43,381 INFO L93 Difference]: Finished difference Result 5359 states and 23854 transitions. [2021-03-10 22:33:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:33:43,383 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:33:43,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:43,396 INFO L225 Difference]: With dead ends: 5359 [2021-03-10 22:33:43,396 INFO L226 Difference]: Without dead ends: 5278 [2021-03-10 22:33:43,397 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1883.5ms TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:33:43,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5278 states. [2021-03-10 22:33:43,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5278 to 4732. [2021-03-10 22:33:43,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4732 states, 4731 states have (on average 4.515324455717607) internal successors, (21362), 4731 states have internal predecessors, (21362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4732 states to 4732 states and 21362 transitions. [2021-03-10 22:33:43,498 INFO L78 Accepts]: Start accepts. Automaton has 4732 states and 21362 transitions. Word has length 30 [2021-03-10 22:33:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:43,498 INFO L480 AbstractCegarLoop]: Abstraction has 4732 states and 21362 transitions. [2021-03-10 22:33:43,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:43,498 INFO L276 IsEmpty]: Start isEmpty. Operand 4732 states and 21362 transitions. [2021-03-10 22:33:43,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:43,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:43,507 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:43,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-03-10 22:33:43,708 INFO L428 AbstractCegarLoop]: === Iteration 152 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:43,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:43,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1896558996, now seen corresponding path program 20 times [2021-03-10 22:33:43,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:43,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012351251] [2021-03-10 22:33:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:44,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012351251] [2021-03-10 22:33:44,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718445176] [2021-03-10 22:33:44,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:44,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:33:44,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:44,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:33:44,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:44,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:33:44,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:44,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-03-10 22:33:44,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:44,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:44,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:44,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-03-10 22:33:44,959 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 22:33:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:45,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:45,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-03-10 22:33:45,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797607793] [2021-03-10 22:33:45,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:45,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:45,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:45,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:45,229 INFO L87 Difference]: Start difference. First operand 4732 states and 21362 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:45,519 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-10 22:33:46,023 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-03-10 22:33:46,229 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 22:33:47,346 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 22:33:47,809 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 22:33:48,135 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-03-10 22:33:48,517 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 22:33:48,811 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 22:33:48,990 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 22:33:49,163 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 22:33:49,545 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-10 22:33:50,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:50,267 INFO L93 Difference]: Finished difference Result 5205 states and 23100 transitions. [2021-03-10 22:33:50,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:33:50,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:33:50,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:50,282 INFO L225 Difference]: With dead ends: 5205 [2021-03-10 22:33:50,282 INFO L226 Difference]: Without dead ends: 5124 [2021-03-10 22:33:50,282 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 3595.1ms TimeCoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:33:50,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5124 states. [2021-03-10 22:33:50,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5124 to 4730. [2021-03-10 22:33:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4730 states, 4729 states have (on average 4.515965320363713) internal successors, (21356), 4729 states have internal predecessors, (21356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:50,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 21356 transitions. [2021-03-10 22:33:50,380 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 21356 transitions. Word has length 30 [2021-03-10 22:33:50,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:50,380 INFO L480 AbstractCegarLoop]: Abstraction has 4730 states and 21356 transitions. [2021-03-10 22:33:50,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:50,381 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 21356 transitions. [2021-03-10 22:33:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:33:50,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:50,390 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:50,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-03-10 22:33:50,591 INFO L428 AbstractCegarLoop]: === Iteration 153 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:50,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:50,591 INFO L82 PathProgramCache]: Analyzing trace with hash -474649468, now seen corresponding path program 21 times [2021-03-10 22:33:50,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:50,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165544478] [2021-03-10 22:33:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:50,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165544478] [2021-03-10 22:33:50,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87991027] [2021-03-10 22:33:50,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:33:50,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:33:50,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:50,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:33:50,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:51,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:51,283 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 [2021-03-10 22:33:51,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:33:51,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:33:51,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:33:51,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-03-10 22:33:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:51,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:51,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-03-10 22:33:51,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647583860] [2021-03-10 22:33:51,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:51,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:51,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:51,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:51,522 INFO L87 Difference]: Start difference. First operand 4730 states and 21356 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:52,020 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-03-10 22:33:52,170 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-10 22:33:52,528 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 22:33:54,120 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-10 22:33:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:55,634 INFO L93 Difference]: Finished difference Result 5998 states and 26401 transitions. [2021-03-10 22:33:55,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 22:33:55,635 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:33:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:55,635 INFO L225 Difference]: With dead ends: 5998 [2021-03-10 22:33:55,635 INFO L226 Difference]: Without dead ends: 0 [2021-03-10 22:33:55,636 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 2983.3ms TimeCoverageRelationStatistics Valid=375, Invalid=2595, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 22:33:55,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-10 22:33:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-10 22:33:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-10 22:33:55,636 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-03-10 22:33:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:55,636 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-10 22:33:55,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-10 22:33:55,636 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-10 22:33:55,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-03-10 22:33:55,841 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 10:33:55 BasicIcfg [2021-03-10 22:33:55,841 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 22:33:55,841 INFO L168 Benchmark]: Toolchain (without parser) took 250570.79 ms. Allocated memory was 255.9 MB in the beginning and 1.4 GB in the end (delta: 1.1 GB). Free memory was 235.8 MB in the beginning and 659.0 MB in the end (delta: -423.2 MB). Peak memory consumption was 674.5 MB. Max. memory is 16.0 GB. [2021-03-10 22:33:55,842 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 255.9 MB. Free memory is still 237.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:33:55,842 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.27 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 233.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:33:55,842 INFO L168 Benchmark]: Boogie Preprocessor took 36.96 ms. Allocated memory is still 255.9 MB. Free memory was 233.9 MB in the beginning and 233.0 MB in the end (delta: 912.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:33:55,842 INFO L168 Benchmark]: RCFGBuilder took 529.92 ms. Allocated memory is still 255.9 MB. Free memory was 232.8 MB in the beginning and 228.9 MB in the end (delta: 3.9 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.0 GB. [2021-03-10 22:33:55,842 INFO L168 Benchmark]: TraceAbstraction took 249951.87 ms. Allocated memory was 255.9 MB in the beginning and 1.4 GB in the end (delta: 1.1 GB). Free memory was 228.3 MB in the beginning and 659.0 MB in the end (delta: -430.8 MB). Peak memory consumption was 665.6 MB. Max. memory is 16.0 GB. [2021-03-10 22:33:55,842 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 0.23 ms. Allocated memory is still 255.9 MB. Free memory is still 237.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 40.27 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 233.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 36.96 ms. Allocated memory is still 255.9 MB. Free memory was 233.9 MB in the beginning and 233.0 MB in the end (delta: 912.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 529.92 ms. Allocated memory is still 255.9 MB. Free memory was 232.8 MB in the beginning and 228.9 MB in the end (delta: 3.9 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 249951.87 ms. Allocated memory was 255.9 MB in the beginning and 1.4 GB in the end (delta: 1.1 GB). Free memory was 228.3 MB in the beginning and 659.0 MB in the end (delta: -430.8 MB). Peak memory consumption was 665.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 110]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 249768.2ms, OverallIterations: 153, TraceHistogramMax: 2, EmptinessCheckTime: 771.3ms, AutomataDifference: 149364.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 72.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14416 SDtfs, 34008 SDslu, 96866 SDs, 0 SdLazy, 93765 SolverSat, 7869 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 51423.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6873 GetRequests, 3136 SyntacticMatches, 188 SemanticMatches, 3549 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23333 ImplicationChecksByTransitivity, 100540.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4878occurred in iteration=123, InterpolantAutomatonStates: 3119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7815.0ms AutomataMinimizationTime, 153 MinimizatonAttempts, 124619 StatesRemovedByMinimization, 149 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1074.7ms SsaConstructionTime, 2427.8ms SatisfiabilityAnalysisTime, 55094.7ms InterpolantComputationTime, 7988 NumberOfCodeBlocks, 7988 NumberOfCodeBlocksAsserted, 441 NumberOfCheckSat, 7692 ConstructedInterpolants, 396 QuantifiedInterpolants, 82527 SizeOfPredicates, 917 NumberOfNonLiveVariables, 17141 ConjunctsInSsa, 2767 ConjunctsInUnsatCore, 296 InterpolantComputations, 10 PerfectInterpolantSequences, 164/994 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 proved your program to be correct! Received shutdown request...